[infinispan-issues] [JBoss JIRA] Commented: (ISPN-699) occasional NullPointerException on unmarshalling in test application

[Galder Zamarreño (JIRA)]

    [ https://jira.jboss.org/browse/ISPN-699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12558076#action_12558076 ] 

Galder Zamarreño commented on ISPN-699:
---------------------------------------

Sanne, no, it's not a problem of equality but more a problem of constant object table having been cleared at stop time.

What I'm not sure here is whether ISPN-630 is the same issue, but I expect at least that my proposed fix will at least give us more clues of what's wrong. The reason I say this cos I can't see how you can carry on talking to the Cache and calling get() on it, if the cache manager has stopped. Remember that the marshaller is a globally scoped component, so will only shut down when the cache manager is stopped.

> occasional NullPointerException on unmarshalling in test application
> --------------------------------------------------------------------
>
>                 Key: ISPN-699
>                 URL: https://jira.jboss.org/browse/ISPN-699
>             Project: Infinispan
>          Issue Type: Sub-task
>          Components: Marshalling
>    Affects Versions: 4.0.0.Final, 4.1.0.Final, 4.2.0.ALPHA2
>            Reporter: Sanne Grinovero
>            Assignee: Galder Zamarreño
>             Fix For: 4.2.0.BETA1, 4.2.0.Final
>
>         Attachments: 697ispn-infinispan-readersclearedbeforeeviction.log
>
>
> See the parent issue ISPN-697 , which contains more details and an application which can occasionally reproduce the NPE.
> 2010-10-11 15:55:27,305 ERROR [Scheduled-eviction-thread-0] (FileCacheStore.java:184) - Error while reading from file: /home/cching/dev/infinispan-hang/./store/Users/-202784536 
> java.lang.NullPointerException 
> at org.infinispan.marshall.jboss.ConstantObjectTable.readObject(ConstantObjectTable.java:253) 
> at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:357) 
> at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:207) 
> at org.jboss.marshalling.AbstractUnmarshaller.readObject(AbstractUnmarshaller.java:85) 
> at org.infinispan.marshall.jboss.GenericJBossMarshaller.objectFromObjectStream(GenericJBossMarshaller.java:162) 
> at org.infinispan.marshall.VersionAwareMarshaller.objectFromObjectStream(VersionAwareMarshaller.java:179) 
> at org.infinispan.loaders.file.FileCacheStore.objectFromInputStreamInReentrantMode(FileCacheStore.java:262) 
> at org.infinispan.loaders.file.FileCacheStore.loadBucket(FileCacheStore.java:181) 
> at org.infinispan.loaders.file.FileCacheStore.purgeInternal(FileCacheStore.java:161) 
> at org.infinispan.loaders.AbstractCacheStore$2.run(AbstractCacheStore.java:84) 
> at org.infinispan.util.concurrent.WithinThreadExecutor.execute(WithinThreadExecutor.java:47) 
> at org.infinispan.loaders.AbstractCacheStore.purgeExpired(AbstractCacheStore.java:81) 
> at org.infinispan.eviction.EvictionManagerImpl.processEviction(EvictionManagerImpl.java:115) 
> at org.infinispan.eviction.EvictionManagerImpl$ScheduledTask.run(EvictionManagerImpl.java:136) 
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) 
> at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317) 
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150) 
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98) 
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181) 
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205) 
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
> at java.lang.Thread.run(Thread.java:619)  

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