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Posted to users@tomcat.apache.org by Stanislav Mironov <sm...@gmail.com> on 2005/11/09 08:52:03 UTC
NPE while undeploying webapp on Tomcat 5.5.12
Hi All!
I get such exception report in catalina.xxxx.log when I undeploy web
application (deployed as WAR).
09.11.2005 10:46:59 org.apache.catalina.startup.HostConfig checkResources
INFO: Undeploying context [/context1]
09.11.2005 10:47:12 org.apache.catalina.startup.HostConfig checkResources
INFO: Undeploying context [/context1]
09.11.2005 10:47:12
org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor
processChildren
SEVERE: Exception invoking periodic operation:
java.lang.NullPointerException
at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:883)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1019)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1178)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:292)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1304)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1568)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1577)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1557)
at java.lang.Thread.run(Unknown Source)
What is the reason - bug in tomcat?
--
Stanislav Mironov
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Re: NPE while undeploying webapp on Tomcat 5.5.12
Posted by Mark Thomas <ma...@apache.org>.
Stanislav Mironov wrote:
<snip>
>>>09.11.2005 10:47:12
>>>org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor
>>>processChildren
>>>SEVERE: Exception invoking periodic operation:
>>>java.lang.NullPointerException
>>> at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:883)
>>>
>>>What is the reason - bug in tomcat?
>>
>>Maybe, maybe not. What are the steps to reproduce?
>
>
> Steps to reproduce are here:
> http://issues.apache.org/bugzilla/show_bug.cgi?id=37425
> (JAR-locking related issue).
> The issue was marked INVALID, but I see no excuses for Tomcat to throw
> such meaningless exception without explanations what exactly has
> happened.
I have followed your steps and do not see any error. Can you provide
me with the smallest possible webapp that demonstrates this issue?
Without this, there isn't much more I can do. You will need to mail it
to me directly (or attach it to the bugzilla issue) as the mailing
lists block most (all?) attachments.
Mark
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Re: NPE while undeploying webapp on Tomcat 5.5.12
Posted by Stanislav Mironov <sm...@gmail.com>.
2005/11/9, Mark Thomas <ma...@apache.org>:
> Stanislav Mironov wrote:
> > I get such exception report in catalina.xxxx.log when I undeploy web
> > application (deployed as WAR).
> >
> > 09.11.2005 10:46:59 org.apache.catalina.startup.HostConfig checkResources
> > INFO: Undeploying context [/context1]
> > 09.11.2005 10:47:12 org.apache.catalina.startup.HostConfig checkResources
> > INFO: Undeploying context [/context1]
>
> Looks like two overlapping attempts to undeploy the same context. Not
> surprising that this results in an NPE at some point.
Yes, I have noticed that.
> > 09.11.2005 10:47:12
> > org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor
> > processChildren
> > SEVERE: Exception invoking periodic operation:
> > java.lang.NullPointerException
> > at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:883)
> >
> > What is the reason - bug in tomcat?
>
> Maybe, maybe not. What are the steps to reproduce?
Steps to reproduce are here:
http://issues.apache.org/bugzilla/show_bug.cgi?id=37425
(JAR-locking related issue).
The issue was marked INVALID, but I see no excuses for Tomcat to throw
such meaningless exception without explanations what exactly has
happened.
--
Stanislav Mironov
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Re: NPE while undeploying webapp on Tomcat 5.5.12
Posted by Mark Thomas <ma...@apache.org>.
Stanislav Mironov wrote:
> Hi All!
>
> I get such exception report in catalina.xxxx.log when I undeploy web
> application (deployed as WAR).
>
> 09.11.2005 10:46:59 org.apache.catalina.startup.HostConfig checkResources
> INFO: Undeploying context [/context1]
> 09.11.2005 10:47:12 org.apache.catalina.startup.HostConfig checkResources
> INFO: Undeploying context [/context1]
Looks like two overlapping attempts to undeploy the same context. Not
surprising that this results in an NPE at some point.
> 09.11.2005 10:47:12
> org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor
> processChildren
> SEVERE: Exception invoking periodic operation:
> java.lang.NullPointerException
> at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:883)
> at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1019)
> at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1178)
> at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:292)
> at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
> at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1304)
> at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1568)
> at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1577)
> at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1557)
> at java.lang.Thread.run(Unknown Source)
>
> What is the reason - bug in tomcat?
Maybe, maybe not. What are the steps to reproduce?
Mark
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