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Posted to users@tomcat.apache.org by "Danne, Christoph (EXT)" <ch...@siemens.com> on 2006/06/28 18:18:37 UTC
log4j NPE after redeployment of app on TC 5.5.17
Hi,
I've just migrated my app from TC 5.0.28 to TC 5.5.17 and run into
problems after redeployment. After the initial deployment everything
works just fine. When I copy a new version of the war into the webapps
directory, tomcat expands it automatically and restarts the application.
But when I first try to access the app after that, I get a
NullPointerException from a log4j class (see stack trace below). My app
uses log4j and the log4j.jar resides in the WEB-INF/lib directory of the
app. Any clues what is going wrong and why it only happens after the app
is redeployed?
Thanks,
Christoph
Stack Trace:
28.06.2006 18:16:04 org.apache.catalina.connector.CoyoteAdapter service
SEVERE: An exception or error occurred in the container during the
request processing
java.lang.NullPointerException
at
org.apache.log4j.spi.LocationInfo.<init>(LocationInfo.java:104)
at
org.apache.log4j.spi.LoggingEvent.getLocationInformation(LoggingEvent.ja
va:191)
at
org.apache.log4j.helpers.PatternParser$LocationPatternConverter.convert(
PatternParser.java:483)
at
org.apache.log4j.helpers.PatternConverter.format(PatternConverter.java:6
4)
at org.apache.log4j.PatternLayout.format(PatternLayout.java:503)
at
org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:301)
at
org.apache.log4j.WriterAppender.append(WriterAppender.java:159)
at
org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:230)
at
org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(Ap
penderAttachableImpl.java:65)
at org.apache.log4j.Category.callAppenders(Category.java:203)
at org.apache.log4j.Category.forcedLog(Category.java:388)
at org.apache.log4j.Category.log(Category.java:853)
at
org.apache.commons.logging.impl.Log4JLogger.debug(Log4JLogger.java:110)
at
org.apache.catalina.authenticator.FormAuthenticator.authenticate(FormAut
henticator.java:234)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authenticator
Base.java:490)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
:126)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:105)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1
48)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:86
9)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc
essConnection(Http11BaseProtocol.java:664)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint
.java:527)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow
erWorkerThread.java:80)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
.java:684)
at java.lang.Thread.run(Thread.java:595)
Re: log4j NPE after redeployment of app on TC 5.5.17
Posted by Lou Caudell <lc...@wtceng.com>.
Maybe not your answer, but I've encountered similar messages when the
log4j*.jar and properties files were not copied to the server
directories. If you using it that way, which would require a server
restart.
- Lou Caudell
Leon Rosenberg wrote:
> I think there was a bug (already fixed in the trunk) related to your
> situation. I experienced the same behaviour. It happend because in the
> middle of the shutdown process a wrong classloader was used, not sure
> though.
> I didn't try a new version myself, just added checks for null before
> loging in places it occured:
> if (log!=null)
> log.debug(...)
>
>
>
> http://issues.apache.org/bugzilla/show_bug.cgi?id=39631
> and
> http://issues.apache.org/bugzilla/show_bug.cgi?id=39769
> could be related
>
> regards
> Leon
>
> On 6/28/06, Danne, Christoph (EXT) <ch...@siemens.com>
> wrote:
>> Hi,
>>
>> I've just migrated my app from TC 5.0.28 to TC 5.5.17 and run into
>> problems after redeployment. After the initial deployment everything
>> works just fine. When I copy a new version of the war into the webapps
>> directory, tomcat expands it automatically and restarts the application.
>> But when I first try to access the app after that, I get a
>> NullPointerException from a log4j class (see stack trace below). My app
>> uses log4j and the log4j.jar resides in the WEB-INF/lib directory of the
>> app. Any clues what is going wrong and why it only happens after the app
>> is redeployed?
>>
>> Thanks,
>> Christoph
>>
>> Stack Trace:
>>
>> 28.06.2006 18:16:04 org.apache.catalina.connector.CoyoteAdapter service
>> SEVERE: An exception or error occurred in the container during the
>> request processing
>> java.lang.NullPointerException
>> at
>> org.apache.log4j.spi.LocationInfo.<init>(LocationInfo.java:104)
>> at
>> org.apache.log4j.spi.LoggingEvent.getLocationInformation(LoggingEvent.ja
>> va:191)
>> at
>> org.apache.log4j.helpers.PatternParser$LocationPatternConverter.convert(
>> PatternParser.java:483)
>> at
>> org.apache.log4j.helpers.PatternConverter.format(PatternConverter.java:6
>> 4)
>> at org.apache.log4j.PatternLayout.format(PatternLayout.java:503)
>> at
>> org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:301)
>> at
>> org.apache.log4j.WriterAppender.append(WriterAppender.java:159)
>> at
>> org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:230)
>> at
>> org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(Ap
>> penderAttachableImpl.java:65)
>> at org.apache.log4j.Category.callAppenders(Category.java:203)
>> at org.apache.log4j.Category.forcedLog(Category.java:388)
>> at org.apache.log4j.Category.log(Category.java:853)
>> at
>> org.apache.commons.logging.impl.Log4JLogger.debug(Log4JLogger.java:110)
>> at
>> org.apache.catalina.authenticator.FormAuthenticator.authenticate(FormAut
>> henticator.java:234)
>> at
>> org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authenticator
>> Base.java:490)
>> at
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
>> :126)
>> at
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
>> :105)
>> at
>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
>> java:107)
>> at
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1
>> 48)
>> at
>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:86
>> 9)
>> at
>> org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc
>> essConnection(Http11BaseProtocol.java:664)
>> at
>> org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint
>> .java:527)
>> at
>> org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow
>> erWorkerThread.java:80)
>> at
>> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
>> .java:684)
>> at java.lang.Thread.run(Thread.java:595)
>>
>>
>
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Re: log4j NPE after redeployment of app on TC 5.5.17
Posted by Leon Rosenberg <ro...@googlemail.com>.
I think there was a bug (already fixed in the trunk) related to your
situation. I experienced the same behaviour. It happend because in the
middle of the shutdown process a wrong classloader was used, not sure
though.
I didn't try a new version myself, just added checks for null before
loging in places it occured:
if (log!=null)
log.debug(...)
http://issues.apache.org/bugzilla/show_bug.cgi?id=39631
and
http://issues.apache.org/bugzilla/show_bug.cgi?id=39769
could be related
regards
Leon
On 6/28/06, Danne, Christoph (EXT) <ch...@siemens.com> wrote:
> Hi,
>
> I've just migrated my app from TC 5.0.28 to TC 5.5.17 and run into
> problems after redeployment. After the initial deployment everything
> works just fine. When I copy a new version of the war into the webapps
> directory, tomcat expands it automatically and restarts the application.
> But when I first try to access the app after that, I get a
> NullPointerException from a log4j class (see stack trace below). My app
> uses log4j and the log4j.jar resides in the WEB-INF/lib directory of the
> app. Any clues what is going wrong and why it only happens after the app
> is redeployed?
>
> Thanks,
> Christoph
>
> Stack Trace:
>
> 28.06.2006 18:16:04 org.apache.catalina.connector.CoyoteAdapter service
> SEVERE: An exception or error occurred in the container during the
> request processing
> java.lang.NullPointerException
> at
> org.apache.log4j.spi.LocationInfo.<init>(LocationInfo.java:104)
> at
> org.apache.log4j.spi.LoggingEvent.getLocationInformation(LoggingEvent.ja
> va:191)
> at
> org.apache.log4j.helpers.PatternParser$LocationPatternConverter.convert(
> PatternParser.java:483)
> at
> org.apache.log4j.helpers.PatternConverter.format(PatternConverter.java:6
> 4)
> at org.apache.log4j.PatternLayout.format(PatternLayout.java:503)
> at
> org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:301)
> at
> org.apache.log4j.WriterAppender.append(WriterAppender.java:159)
> at
> org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:230)
> at
> org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(Ap
> penderAttachableImpl.java:65)
> at org.apache.log4j.Category.callAppenders(Category.java:203)
> at org.apache.log4j.Category.forcedLog(Category.java:388)
> at org.apache.log4j.Category.log(Category.java:853)
> at
> org.apache.commons.logging.impl.Log4JLogger.debug(Log4JLogger.java:110)
> at
> org.apache.catalina.authenticator.FormAuthenticator.authenticate(FormAut
> henticator.java:234)
> at
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authenticator
> Base.java:490)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java
> :126)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
> :105)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
> java:107)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1
> 48)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:86
> 9)
> at
> org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc
> essConnection(Http11BaseProtocol.java:664)
> at
> org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint
> .java:527)
> at
> org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow
> erWorkerThread.java:80)
> at
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool
> .java:684)
> at java.lang.Thread.run(Thread.java:595)
>
>
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