Description of problem:

NullPointerException occured some times during heavy load. Since it only seems to occur during heavy load and that LIRSEvictionPolicy is involved, we suspect that it has something to do with the number of entries in the cache.

The configuration is:

 <namedCache name="myCache">
        <transaction transactionMode="NON_TRANSACTIONAL" />
        <eviction strategy="LIRS" maxEntries="10000" />
        <expiration maxIdle="250000" lifespan="600000" wakeUpInterval="10000" />
    </namedCache>

This unresolved case https://issues.jboss.org/browse/ISPN-6366 might be related.



Stack trace example:

ERROR [org.infinispan.interceptors.InvocationContextInterceptor] (pool-9-thread-17) ISPN000136: Error executing command PutKeyValueCommand, writing keys [9c7708a2-18e9-4b3f-9f62-c9fd702a241b]: java.lang.NullPointerException
	at org.infinispan.commons.util.concurrent.jdk8backported.BoundedEquivalentConcurrentHashMapV8$LIRSEvictionPolicy.findIfEntriesNeedEvicting(BoundedEquivalentConcurrentHashMapV8.java:1414) [infinispan-commons-6.4.0.Final-redhat-4.jar:6.4.0.Final-redhat-4]
	at org.infinispan.commons.util.concurrent.jdk8backported.BoundedEquivalentConcurrentHashMapV8.compute(BoundedEquivalentConcurrentHashMapV8.java:3534) [infinispan-commons-6.4.0.Final-redhat-4.jar:6.4.0.Final-redhat-4]
	at org.infinispan.container.DefaultDataContainer$BoundedEquivalentConcurrentExtendedMap.putAndActivate(DefaultDataContainer.java:611) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.container.DefaultDataContainer.put(DefaultDataContainer.java:191) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.container.entries.ReadCommittedEntry.commit(ReadCommittedEntry.java:168) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.statetransfer.CommitManager.commit(CommitManager.java:98) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.locking.ClusteringDependentLogic$LocalLogic.commitEntry(ClusteringDependentLogic.java:239) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.EntryWrappingInterceptor.commitContextEntry(EntryWrappingInterceptor.java:349) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.EntryWrappingInterceptor.commitEntryIfNeeded(EntryWrappingInterceptor.java:567) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.EntryWrappingInterceptor.commitContextEntries(EntryWrappingInterceptor.java:326) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.EntryWrappingInterceptor.invokeNextAndApplyChanges(EntryWrappingInterceptor.java:400) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.EntryWrappingInterceptor.setSkipRemoteGetsAndInvokeNextForDataCommand(EntryWrappingInterceptor.java:454) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.EntryWrappingInterceptor.visitPutKeyValueCommand(EntryWrappingInterceptor.java:188) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:71) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.locking.AbstractLockingInterceptor.visitPutKeyValueCommand(AbstractLockingInterceptor.java:49) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:71) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.CacheMgmtInterceptor.updateStoreStatistics(CacheMgmtInterceptor.java:182) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.CacheMgmtInterceptor.visitPutKeyValueCommand(CacheMgmtInterceptor.java:168) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:71) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:98) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:105) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:74) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:43) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:71) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:336) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.CacheImpl.executeCommandAndCommitIfNeeded(CacheImpl.java:1610) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.CacheImpl.putInternal(CacheImpl.java:1079) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.CacheImpl.put(CacheImpl.java:1070) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.CacheImpl.put(CacheImpl.java:1655) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]
	at org.infinispan.CacheImpl.put(CacheImpl.java:253) [infinispan-core-6.4.0.Final-redhat-4-bz-1316132.jar:6.4.0.Final-redhat-4]