[infinispan-issues] [JBoss JIRA] Commented: (ISPN-630) NullPointerException during object unmarshalling

[Sanne Grinovero (JIRA)]

    [ https://jira.jboss.org/browse/ISPN-630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12549272#action_12549272 ] 

Sanne Grinovero commented on ISPN-630:
--------------------------------------

the method "org.infinispan.lucene.FileListOperations.getFileList()" is supposed to return always and only either null or an instance of org.infinispan.util.concurrent.ConcurrentHashSet<String>, and this might be empty or some String instances.

The access pattern which brings this up is quite harder; but all operations on this key are collected in the one simple class org.infinispan.lucene.FileListOperations

> NullPointerException during object unmarshalling
> ------------------------------------------------
>
>                 Key: ISPN-630
>                 URL: https://jira.jboss.org/browse/ISPN-630
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Marshalling
>    Affects Versions: 4.1.0.Final
>            Reporter: Sanne Grinovero
>            Assignee: Galder Zamarreño
>             Fix For: 4.2.0.BETA1, 5.0.0.BETA1
>
>
> It appears the ExternalizerAdapter was not added to the readers, or that input.readUnsignedByte() reads a wrong identifier value.
> Not easy to reproduce, get this sometimes under load:
> Exception in thread "Scarlet/Lucene service thread index reopening thread-1" 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.objectFromByteBuffer(VersionAwareMarshaller.java:111)
> 	at org.infinispan.marshall.AbstractStreamingMarshaller.objectFromInputStream(AbstractStreamingMarshaller.java:23)
> 	at org.infinispan.loaders.jdbc.JdbcUtil.unmarshall(JdbcUtil.java:88)
> 	at org.infinispan.loaders.jdbc.stringbased.JdbcStringBasedCacheStore.loadLockSafe(JdbcStringBasedCacheStore.java:298)
> 	at org.infinispan.loaders.LockSupportCacheStore.load(LockSupportCacheStore.java:100)
> 	at org.infinispan.loaders.decorators.AbstractDelegatingStore.load(AbstractDelegatingStore.java:86)
> 	at org.infinispan.interceptors.CacheLoaderInterceptor.loadIfNeeded(CacheLoaderInterceptor.java:138)
> 	at org.infinispan.interceptors.CacheLoaderInterceptor.loadIfNeededAndUpdateStats(CacheLoaderInterceptor.java:200)
> 	at org.infinispan.interceptors.CacheLoaderInterceptor.visitGetKeyValueCommand(CacheLoaderInterceptor.java:87)
> 	at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
> 	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
> 	at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:132)
> 	at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:87)
> 	at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
> 	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
> 	at org.infinispan.interceptors.TxInterceptor.enlistReadAndInvokeNext(TxInterceptor.java:171)
> 	at org.infinispan.interceptors.TxInterceptor.visitGetKeyValueCommand(TxInterceptor.java:162)
> 	at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
> 	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
> 	at org.infinispan.interceptors.CacheMgmtInterceptor.visitGetKeyValueCommand(CacheMgmtInterceptor.java:83)
> 	at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
> 	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
> 	at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:57)
> 	at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:38)
> 	at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:87)
> 	at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
> 	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
> 	at org.infinispan.interceptors.BatchingInterceptor.handleDefault(BatchingInterceptor.java:76)
> 	at org.infinispan.commands.AbstractVisitor.visitGetKeyValueCommand(AbstractVisitor.java:87)
> 	at org.infinispan.commands.read.GetKeyValueCommand.acceptVisitor(GetKeyValueCommand.java:58)
> 	at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:273)
> 	at org.infinispan.CacheDelegate.get(CacheDelegate.java:200)
> 	at org.infinispan.lucene.FileListOperations.getFileList(FileListOperations.java:54)
> 	

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