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Posted to commits@wicket.apache.org by "Stefan Wille (JIRA)" <ji...@apache.org> on 2007/03/30 19:20:25 UTC
[jira] Created: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
File handles are leaked when loading images from a jar file, Tomcat crashes
---------------------------------------------------------------------------
Key: WICKET-438
URL: https://issues.apache.org/jira/browse/WICKET-438
Project: Wicket
Issue Type: Bug
Components: wicket
Affects Versions: 1.2.5
Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
and also
java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
Firefox 2.0.3 with Web developer Toolbar
Reporter: Stefan Wille
Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
To reproduce this bug, please switch off the browser cache.
My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
"lsof | grep wicket" gives me:
firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
[...many lines like this deleted]
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[jira] Reopened: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Stefan Wille (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Stefan Wille reopened WICKET-438:
---------------------------------
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Johan Compagner (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12489863 ]
Johan Compagner commented on WICKET-438:
----------------------------------------
and it needs to load all the resources at least once. The question is now does it grow and grow when
there are really no new resources accessed?
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Johan Compagner (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490276 ]
Johan Compagner commented on WICKET-438:
----------------------------------------
If you could see what code triggers a file handle then we can look at it.
But i am affraid that we can't really do more about it, it really seems to be an jvm issue. We do try to close everything we can.
(but ofcourse maybe somewhere there is a place where we forget it...)\
You always can use the 2 tomcat context properties:
antiJARLocking and antiResourceLocking: http://tomcat.apache.org/tomcat-5.5-doc/config/context.html
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Jean-Baptiste Quenot (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12485724 ]
Jean-Baptiste Quenot commented on WICKET-438:
---------------------------------------------
Did you ensure to deploy your application in *deployment* mode? Did you have a look at the mailing-list archives? This problem has been reported numerous times, and it's a bug in the JVM. But a workaround exists in Wicket.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Stefan Wille (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12485999 ]
Stefan Wille commented on WICKET-438:
-------------------------------------
Yes, I put my WebApplication in deployment mode. This is the code:
@Override
protected void init() {
...
configure(DEPLOYMENT);
}
I just searched the mailing list. In this posting
http://www.nabble.com/File-descriptor-leak-in-DEVELOPMENT-mode-tf2280488.html#a6340061
Jean-Baptiste says the problem occurs not only in development but also in deployment mode.
We are using Wicket 1.2.5, so a backport of the workaround to 1.2.x would be great.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Stefan Wille (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12488672 ]
Stefan Wille commented on WICKET-438:
-------------------------------------
We have backported the file UrlResourceStream.java from the trunk. This version works perfectly on Mac OS X. On Linux, the problem is reduced, but we can still get Tomcat to the point that it produces errors. We would appreciate if somebody from the Wicket team could do a proper backport of the workaround from 1.3.
I have attached our copy of UrlResourceStream.java in case somebody would like to use it.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Johan Compagner (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12485760 ]
Johan Compagner commented on WICKET-438:
----------------------------------------
that workaround is only in 1.3 i think
We could backport this to 1.2.x if needed
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Stefan Wille (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490642 ]
Stefan Wille commented on WICKET-438:
-------------------------------------
I have just tested our application with Wicket 1.2.6 on a fresh install of OpenSuse 10.2 Linux, and it works fine - no more leaking. If somebody else has a problem with leaked file handles, please try a later Linux version. For me, the issue is solved. Thank you for helping.
I used Sun JDK 1.5.0_11 and Tomcat 5.5.20 for this test.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Closed: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Johan Compagner (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Johan Compagner closed WICKET-438.
----------------------------------
Resolution: Fixed
Fix Version/s: 1.2.6
backported it for 1.2.6
Dont know why you still are able to crash tomcat. with that fix
do you still have that also with 1.3?
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Assigned: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Igor Vaynberg (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Igor Vaynberg reassigned WICKET-438:
------------------------------------
Assignee: Johan Compagner
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Updated: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Stefan Wille (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Stefan Wille updated WICKET-438:
--------------------------------
Attachment: UrlResourceStream.java
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Ingram Chen (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490262 ]
Ingram Chen commented on WICKET-438:
------------------------------------
We have tried with latest Tomcat 6.0.10 but still have file-handle-grows-issue. This cause our site crashes twice a month...
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Closed: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Johan Compagner (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Johan Compagner closed WICKET-438.
----------------------------------
Resolution: Fixed
Fix Version/s: 1.3
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6, 1.3
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Eelco Hillenius (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490394 ]
Eelco Hillenius commented on WICKET-438:
----------------------------------------
The problems I've seen in the past with this also solely were with Linux.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Stefan Wille (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490420 ]
Stefan Wille commented on WICKET-438:
-------------------------------------
For Wicket 1.2.5, we've seen the problem both on Mac OS X and on Linux. With Wicket 1.2.6, the problem seems to be fixed on Mac OS X.
We are going to try Wicket 1.2.6 with Linux next week.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Eelco Hillenius (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12489807 ]
Eelco Hillenius commented on WICKET-438:
----------------------------------------
Ensure it realy is Wicket though. For my day project we recently fixed a file leak bug in Jetty (6.0/ 6.1), so it is entirely possible it's the container.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Johan Compagner (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490291 ]
Johan Compagner commented on WICKET-438:
----------------------------------------
That code IS the fix if we don't test if it is jar url connection and we do just what is in the else then we have a much much bigger problem.
Because then we are not able to close the jar file. And then we will leak a file handle everytime we access lastModifiedTime() (in developement mode you will run out of handles very shortly)
The only thing i can think of is that there are constantly new ResourceReferences/Resources created somehow to the same resouce (gif/css/js)
because in the constructor we have to do once: urlconnection.getContentType() and getContentLenght()
that will open the jar file. But this shouldn't happen becaues (package)resources are registered and loaded once.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Stefan Wille (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490392 ]
Stefan Wille commented on WICKET-438:
-------------------------------------
We think that the remaining issue is caused by Linux, not Wicket.
We have tried Jetty 6.1.1 instead of Tomcat 5.5 on our Linux server, which didn't help.
Then we tried Wicket 1.3 with wicket-examples and Jetty on two other Linux machines, and the problem seems to be gone.
These two machines have a newer kernel and probably a newer glibc.
We still see the number of open wicket jar files increase by about 15, but it also decreases to the starting point, although slowly.
Next Monday we are going to try the 1.2.6 development branch with our application on the two new Linux machines.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Stefan Wille (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12489804 ]
Stefan Wille commented on WICKET-438:
-------------------------------------
Wicket 1.3 has the same problem. We we were not able to use our application with 1.3 because of the changed package names, but we tried wicket-examples on our Linux server. We saw the same situation.
We have disabled the browser cache. In wicket-examples, we opened the "Tree and TreeTable" example in the ajax demo. Then we clicked "Expand All Nodes". We got this:
$ while [ true ]; do lsof | grep wicket | wc -l; sleep 1;done
127
127
127
127
125
185
185
185
185
...
The jump to 185 file handles happened when we clicked the link.
The server has Java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17.
Can I do anything to help with this issue?
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Stefan Wille (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12489712 ]
Stefan Wille commented on WICKET-438:
-------------------------------------
Hi Johan, thank you. We have built Wicket from the branch 1.2.x in order to try your backport. The behaviour is the same as with the backport from 2.0 that we did ourselves - we still get more than 900 open wicket-extensions.jar files.
Next we will try 1.3.
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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[jira] Commented: (WICKET-438) File handles are leaked when loading
images from a jar file, Tomcat crashes
Posted by "Jean-Baptiste Quenot (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/WICKET-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12490290 ]
Jean-Baptiste Quenot commented on WICKET-438:
---------------------------------------------
In UrlResourceStream#lastModifiedTime() have you tried to remove the whole code within the "if (urlConnection instanceof JarURLConnection)" statement to see if it helps? Also be careful with the finally statement that might open a connection to the JAR if (close == true).
> File handles are leaked when loading images from a jar file, Tomcat crashes
> ---------------------------------------------------------------------------
>
> Key: WICKET-438
> URL: https://issues.apache.org/jira/browse/WICKET-438
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.2.5
> Environment: java version "1.5.0_07", Mac OS X 10.4, Tomcat 5.5.20
> and also
> java version "1.5.0_07", Linux 2.6.8, Tomcat 5.5.17
> Firefox 2.0.3 with Web developer Toolbar
> Reporter: Stefan Wille
> Assigned To: Johan Compagner
> Fix For: 1.2.6
>
> Attachments: UrlResourceStream.java
>
>
> Wicket leaks file handles when it accesses image files that are part of a jar file, e.g. wicket-1.2.5.jar.
> To reproduce this bug, please switch off the browser cache.
> My Wicket application uses TreeTable. When I access the page with the TreeTable on my Mac server, I see the number of open file handles jump. If I do that repeatedly, I can leak about 50 file handles.
> I observe the number of open file handles via this shell command: while true; do sleep 1; lsof | grep wicket | wc -l; done
> If I do the same test on a Linux server, the number of open files jumps so quickly that I reach 1015 open files after about 4 requests. At this point, Tomcat runs out of file handles, writes a log entry in catalina.out and dies. Probably Tomcat shouldn't crash, but the problem is that Wicket leaks file handles.
> I can also see leaked file handles when I repeatedly access an image from a jar file via http://localhost:8070/wicket-examples/ajax/resources/wicket.extensions.markup.html.tree.DefaultAbstractTree/res/tree-images.png
> The problem can also be reproduced via wicket-examples 1.2.5 and its TreeTable example page by exanding and collapsing the tree table repeatedly.
> If I unpack both wicket-1.2.5.jar and wicket-extensions-1.2.5.jar in WEB-INF/classes and delete the jars afterwards, the number of used file handles remains constant at 5! So access to images in WEB-INF/classes works fine.
> "lsof | grep wicket" gives me:
> firefox-b 1372 stefan 19r REG 14,2 486664 1733273 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> bash 1880 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> bash 4339 stefan cwd DIR 14,2 578 1058285 /Users/stefan/Software/wicket-1.2.5
> java 9529 stefan txt REG 14,2 1249210 1750285 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-1.2.zoomos-SNAPSHOT.jar
> java 9529 stefan txt REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan txt REG 14,2 11063 1750305 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-annot-1.2.5.jar
> java 9529 stefan txt REG 14,2 24890 1750306 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-spring-1.2.5.jar
> java 9529 stefan 29r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 30r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 31r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 32r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 33r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 34r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 35r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 36r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 37r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 38r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 39r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 40r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> java 9529 stefan 41r REG 14,2 486664 1750274 /Users/stefan/Software/apache-tomcat-5.5.20/webapps/middletier/WEB-INF/lib/wicket-extensions-1.2.5.jar
> [...many lines like this deleted]
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