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Posted to dev@tomcat.apache.org by bu...@apache.org on 2018/11/18 15:34:37 UTC
[Bug 62924] New: tomcat-users.xml has open file descriptors and
opens tomcat-users.xml all the time
https://bz.apache.org/bugzilla/show_bug.cgi?id=62924
Bug ID: 62924
Summary: tomcat-users.xml has open file descriptors and opens
tomcat-users.xml all the time
Product: Tomcat 9
Version: 9.0.13
Hardware: Other
OS: Linux
Status: NEW
Severity: major
Priority: P2
Component: Manager
Assignee: dev@tomcat.apache.org
Reporter: siffi@yahoo.com
Target Milestone: -----
Hi everybody
Since tomcat 9.0.13 and the ability to monitor "tomcat-users.xml" was
introduced we encounter quite strange behaviour:
we run into "too many files open" exception after a certain time when tomcat is
running.
nothing changed on the apps which run on this instance, except the version of
tomcat (from 9.0.12 to 9.0.13)
I found now the following strange thing:
when doing "lsof" on the PID runnning tomcat, I see:
[gtt@tgttcn0:~/tomcat/logs:1061> lsof -p 16829 | grep tomcat-users | wc -l
260
a couple of seconds later:
[gtt@tgttcn0:~/tomcat/logs:1062> lsof -p 16829 | grep tomcat-users | wc -l
262
and about 20 seconds later:
[gtt@tgttcn0:~/tomcat/logs:1062> lsof -p 16829 | grep tomcat-users | wc -l
264
and nothing is really going on on the tomcat at the moment.
It looks like something is opening tomcat-users.xml all the time and does not
close it anymore....
Here the same "lsof" command on one of our servers running tomcat 9.0.12:
[gtt@pgttcn1:~:1008> lsof -p 26572 | grep tomcat-users | wc -l
0
thanks for having a look into this
Erich
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[Bug 62924] tomcat-users.xml has open file descriptors and opens
tomcat-users.xml all the time
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62924
--- Comment #3 from Remy Maucherat <re...@apache.org> ---
There is nothing that can be closed here, and the URL is a regular file URL.
However, calling getLastModified on it indeed leaks a descriptor. There's a
problem somewhere and more investigation is needed, but this is odd.
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[Bug 62924] tomcat-users.xml has open file descriptors and opens
tomcat-users.xml all the time
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62924
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |shawn.durbin@eagletg.com
--- Comment #5 from Mark Thomas <ma...@apache.org> ---
*** Bug 62958 has been marked as a duplicate of this bug. ***
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[Bug 62924] tomcat-users.xml has open file descriptors and opens
tomcat-users.xml all the time
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62924
--- Comment #2 from Erich Siffert <si...@yahoo.com> ---
ok, I digged into this a little bit deeper -- I figured out that there is a new
flag "watchSource=false" (default is true) which can be set:
<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved"
factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml"
watchSource="false" />
when I set the flag to false, everything seems to be fine!
I suspect the issue is somewhere here:
MemoryUserDatabase.java
in method "public void backgroundProcess()" which reads the file:
[...]
URI uri = ConfigFileLoader.getURI(getPathname());
try {
URL url = uri.toURL();
URLConnection uConn = url.openConnection();
[...]
but it looks like it remains open....
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[Bug 62924] tomcat-users.xml has open file descriptors and opens
tomcat-users.xml all the time
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62924
charyGao <ga...@126.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gaoyabing@126.com
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[Bug 62924] tomcat-users.xml has open file descriptors and opens
tomcat-users.xml all the time
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62924
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Mark Thomas <ma...@apache.org> ---
Thanks for the report.
Fixed in:
- trunk for 9.0.14 onwards
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[Bug 62924] tomcat-users.xml has open file descriptors and opens
tomcat-users.xml all the time
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62924
--- Comment #6 from Eduardo Guadalupe Quintanilla <ed...@gmail.com> ---
I found a question about a possibly related bug in Tomcat
https://stackoverflow.com/questions/53745188/tomcat-undeploys-wars-automatically-after-some-time.
Could the log include details of the exception to easily confirm the cause of
the issue?
https://github.com/apache/tomcat/blob/40500131c71ec8116eb35628ddf6abd515c012ba/java/org/apache/catalina/users/MemoryUserDatabase.java#L447
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[Bug 62924] tomcat-users.xml has open file descriptors and opens
tomcat-users.xml all the time
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62924
--- Comment #7 from Mark Thomas <ma...@apache.org> ---
(In reply to Eduardo Guadalupe Quintanilla from comment #6)
> I found a question about a possibly related bug in Tomcat
> https://stackoverflow.com/questions/53745188/tomcat-undeploys-wars-
> automatically-after-some-time.
>
> Could the log include details of the exception to easily confirm the cause
> of the issue?
>
> https://github.com/apache/tomcat/blob/
> 40500131c71ec8116eb35628ddf6abd515c012ba/java/org/apache/catalina/users/
> MemoryUserDatabase.java#L447
That is a network issue and unrelated to this bug.
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[Bug 62924] tomcat-users.xml has open file descriptors and opens
tomcat-users.xml all the time
Posted by bu...@apache.org.
https://bz.apache.org/bugzilla/show_bug.cgi?id=62924
--- Comment #1 from Erich Siffert <si...@yahoo.com> ---
here a full listing of the "lsof" command to better illustrate the issue....
[gtt@tgttcn0:~/tomcat/logs:1064> lsof -p 16829 | grep tomcat-users
java 16829 gtt 68r REG 259,5 241 268435594
/home/gtt/apache-tomcat-9.0.13/conf/tomcat-users.xml
java 16829 gtt 71r REG 259,5 241 268435594
/home/gtt/apache-tomcat-9.0.13/conf/tomcat-users.xml
java 16829 gtt 75r REG 259,5 241 268435594
/home/gtt/apache-tomcat-9.0.13/conf/tomcat-users.xml
java 16829 gtt 77r REG 259,5 241 268435594
/home/gtt/apache-tomcat-9.0.13/conf/tomcat-users.xml
java 16829 gtt 78r REG 259,5 241 268435594
/home/gtt/apache-tomcat-9.0.13/conf/tomcat-users.xml
java 16829 gtt 79r REG 259,5 241 268435594
/home/gtt/apache-tomcat-9.0.13/conf/tomcat-users.xml
java 16829 gtt 80r REG 259,5 241 268435594
/home/gtt/apache-tomcat-9.0.13/conf/tomcat-users.xml
java 16829 gtt 81r REG 259,5 241 268435594
/home/gtt/apache-tomcat-9.0.13/conf/tomcat-users.xml
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