[infinispan-dev] frequent stack in testsuite

Thu Jun 9 12:44:56 EDT 2011

I think I know what is going on here and it has nothing to do with 
Galder's externalizers.

At the moment when state producer generates state transfer it cannot 
lock processing lock which is being held by some other reader thread 
which got bogged down in container due to lock or whatever. State 
producer thread in turn times out waiting for this lock and generates 
garbage stream to state receiver. That is why you see these 
java.io.EOFException: Read past end of file on receiver.

I think we can do the following. Reduce timeout on this processing lock 
or increase state transfer timeout. Reader lock will be released and 
state will be generated. However, this will in turn lead to other 
problems like failed tx and what not. I initially thought that this is 
related to FLUSH being removed but the same thing happens with FLUSH in 
stack. It would be great if we can push this together and figure out 
what is the best course of action.

Vladimir

On 11-06-09 11:24 AM, Dan Berindei wrote:
> I don't think it's an externalizer issue, as I also see some
> exceptions on the node that generates state:
>
> 2011-06-09 18:16:18,250 ERROR
> [org.infinispan.remoting.transport.jgroups.JGroupsTransport]
> (STREAMING_STATE_TRANSFER-sender-1,Infinispan-Cluster,NodeA-57902)
> ISPN00095: Caught while responding to state transfer request
> org.infinispan.statetransfer.StateTransferException:
> java.util.concurrent.TimeoutException:
> STREAMING_STATE_TRANSFER-sender-1,Infinispan-Cluster,NodeA-57902 could
> not obtain exclusive processing lock after 10 seconds.  Locks in
> question are java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock at a35c90[Read
> locks = 1] and java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock at 111fb7f[Unlocked]
>          at org.infinispan.statetransfer.StateTransferManagerImpl.generateState(StateTransferManagerImpl.java:177)
>          at org.infinispan.remoting.InboundInvocationHandlerImpl.generateState(InboundInvocationHandlerImpl.java:248)
>          at org.infinispan.remoting.transport.jgroups.JGroupsTransport.getState(JGroupsTransport.java:585)
>          at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.handleUpEvent(MessageDispatcher.java:690)
>          at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:771)
>          at org.jgroups.JChannel.up(JChannel.java:1484)
>          at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:1074)
>          at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER$StateProviderHandler.process(STREAMING_STATE_TRANSFER.java:651)
>          at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER$StateProviderThreadSpawner$1.run(STREAMING_STATE_TRANSFER.java:580)
>          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
>          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
>          at java.lang.Thread.run(Thread.java:636)
> Caused by: java.util.concurrent.TimeoutException:
> STREAMING_STATE_TRANSFER-sender-1,Infinispan-Cluster,NodeA-57902 could
> not obtain exclusive processing lock after 10 seconds.  Locks in
> question are java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock at a35c90[Read
> locks = 1] and java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock at 111fb7f[Unlocked]
>          at org.infinispan.remoting.transport.jgroups.JGroupsDistSync.acquireProcessingLock(JGroupsDistSync.java:100)
>          at org.infinispan.statetransfer.StateTransferManagerImpl.generateTransactionLog(StateTransferManagerImpl.java:204)
>          at org.infinispan.statetransfer.StateTransferManagerImpl.generateState(StateTransferManagerImpl.java:167)
>          ... 11 more
>
> I guess we could write an error marker in the stream to prevent the
> EOFException on the receiving side, but the end result would be the
> same.
>
> Dan
>
>
> On Thu, Jun 9, 2011 at 5:58 PM, Sanne Grinovero<sanne at infinispan.org>  wrote:
>> Hello all,
>> if I happen to look at the console while the tests are running, I see
>> this exception popup very often:
>>
>> 2011-06-09 15:32:18,092 ERROR [JGroupsTransport]
>> (Incoming-1,Infinispan-Cluster,NodeB-32230) ISPN00096: Caught while
>> requesting or applying state
>> org.infinispan.statetransfer.StateTransferException:
>> java.io.EOFException: Read past end of file
>>         at org.infinispan.statetransfer.StateTransferManagerImpl.applyState(StateTransferManagerImpl.java:333)
>>         at org.infinispan.remoting.InboundInvocationHandlerImpl.applyState(InboundInvocationHandlerImpl.java:230)
>>         at org.infinispan.remoting.transport.jgroups.JGroupsTransport.setState(JGroupsTransport.java:602)
>>         at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.handleUpEvent(MessageDispatcher.java:711)
>>         at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:771)
>>         at org.jgroups.JChannel.up(JChannel.java:1441)
>>         at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:1074)
>>         at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER.connectToStateProvider(STREAMING_STATE_TRANSFER.java:523)
>>         at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER.handleStateRsp(STREAMING_STATE_TRANSFER.java:462)
>>         at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER.up(STREAMING_STATE_TRANSFER.java:223)
>>         at org.jgroups.protocols.FRAG2.up(FRAG2.java:189)
>>         at org.jgroups.protocols.FC.up(FC.java:479)
>>         at org.jgroups.protocols.pbcast.GMS.up(GMS.java:891)
>>         at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:246)
>>         at org.jgroups.protocols.UNICAST.handleDataReceived(UNICAST.java:613)
>>         at org.jgroups.protocols.UNICAST.up(UNICAST.java:294)
>>         at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:703)
>>         at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:133)
>>         at org.jgroups.protocols.FD.up(FD.java:275)
>>         at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:275)
>>         at org.jgroups.protocols.MERGE2.up(MERGE2.java:209)
>>         at org.jgroups.protocols.Discovery.up(Discovery.java:291)
>>         at org.jgroups.protocols.TP.passMessageUp(TP.java:1102)
>>         at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1658)
>>         at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1640)
>>         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:662)
>> Caused by: java.io.EOFException: Read past end of file
>>         at org.jboss.marshalling.SimpleDataInput.eofOnRead(SimpleDataInput.java:126)
>>         at org.jboss.marshalling.SimpleDataInput.readUnsignedByteDirect(SimpleDataInput.java:263)
>>         at org.jboss.marshalling.SimpleDataInput.readUnsignedByte(SimpleDataInput.java:224)
>>         at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
>>         at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:37)
>>         at org.infinispan.marshall.jboss.GenericJBossMarshaller.objectFromObjectStream(GenericJBossMarshaller.java:192)
>>         at org.infinispan.marshall.VersionAwareMarshaller.objectFromObjectStream(VersionAwareMarshaller.java:190)
>>         at org.infinispan.statetransfer.StateTransferManagerImpl.processCommitLog(StateTransferManagerImpl.java:230)
>>         at org.infinispan.statetransfer.StateTransferManagerImpl.applyTransactionLog(StateTransferManagerImpl.java:252)
>>         at org.infinispan.statetransfer.StateTransferManagerImpl.applyState(StateTransferManagerImpl.java:322)
>>         ... 27 more
>>
>> But I'm not sure if it's an issue, as it seems tests are not failing.
>> I consider a "Read past end of file" quite suspiciously looking; would
>> it be possible to think that some internal Externalizer is writing
>> less bytes than what it's attempting to read?
>> Is there something clever I could do to understand which object the
>> marshaller is trying to read when something like this is happening?
>> I've found debugging this quite hard.
>>
>> Also, it doesn't look like our externalizers have a good test
>> coverage; They are likely implicitly tested as I assume that nothing
>> would work if they aren't, but still it looks like we have no explicit
>> tests for them?
>>
>> Cheers,
>> Sanne
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