[infinispan-issues] [JBoss JIRA] Updated: (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:all-tabpanel ]

Galder Zamarreño updated ISPN-699:
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    Attachment: 697ispn-infinispan-readersclearedbeforeeviction.log


It seems like the readers collection is just empty. So, my gut feeling is that eviction manager's eviction task is not fully cancelled and so, when eviction comes around, the marshaller has already been made empty. Two things here: Eviction manager should wait for eviction to be fully finished before moving on to stopping the other components and secondly, could ScheduledTask not be responding to interruption properly? 

I'll add more logging to confirm what I'm saying and then need to see where exactly interruption might be swallowed and that it doesn't allow the task to be cancelled properly.

This is definitely a timing issue and it's taking me a while to replicate it each time. 

> 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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