[infinispan-issues] [JBoss JIRA] (ISPN-2386) MapReduce on custom classes doesn't work in case of CacheLoader

[Anna Manukyan (JIRA)]

Anna Manukyan created ISPN-2386:
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             Summary: MapReduce on custom classes doesn't work in case of CacheLoader
                 Key: ISPN-2386
                 URL: https://issues.jboss.org/browse/ISPN-2386
             Project: Infinispan
          Issue Type: Bug
          Components: Distributed Execution and Map/Reduce
    Affects Versions: 5.2.0.Beta1
            Reporter: Anna Manukyan
            Assignee: Vladimir Blagojevic


The issue described in ISPN-2138 reappears in case when the cache is configured with CacheLoader.
The ClassCastException is thrown when MapReduce processes the entries from CacheLoader.

The Exception is:
java.lang.ClassCastException: org.infinispan.marshall.MarshalledValue cannot be cast to org.infinispan.distexec.mapreduce.Book
	at org.infinispan.distexec.mapreduce.BookSearchTest$TitleBookSearcher.map(BookSearchTest.java:74)
	at org.infinispan.distexec.mapreduce.MapReduceManagerImpl.map(MapReduceManagerImpl.java:179)
	at org.infinispan.distexec.mapreduce.MapReduceManagerImpl.mapAndCombineForLocalReduction(MapReduceManagerImpl.java:87)
	at org.infinispan.commands.read.MapCombineCommand.perform(MapCombineCommand.java:91)
	at org.infinispan.remoting.InboundInvocationHandlerImpl.handleInternal(InboundInvocationHandlerImpl.java:95)
	at org.infinispan.remoting.InboundInvocationHandlerImpl.handleWithWaitForBlocks(InboundInvocationHandlerImpl.java:110)
	at org.infinispan.remoting.InboundInvocationHandlerImpl.handle(InboundInvocationHandlerImpl.java:82)
	at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.executeCommandFromLocalCluster(CommandAwareRpcDispatcher.java:244)
	at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.handle(CommandAwareRpcDispatcher.java:217)
	at org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:483)
	at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:390)
	at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:248)
	at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:604)
	at org.jgroups.JChannel.up(JChannel.java:715)
	at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:1020)
	at org.jgroups.protocols.FRAG2.up(FRAG2.java:181)
	at org.jgroups.protocols.FC.up(FC.java:479)
	at org.jgroups.protocols.pbcast.GMS.up(GMS.java:896)
	at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:244)
	at org.jgroups.protocols.UNICAST2.up(UNICAST2.java:432)
	at org.jgroups.protocols.pbcast.NAKACK2.handleMessage(NAKACK2.java:722)
	at org.jgroups.protocols.pbcast.NAKACK2.up(NAKACK2.java:570)
	at org.jgroups.protocols.Discovery.up(Discovery.java:359)
	at org.jgroups.protocols.TP.passMessageUp(TP.java:1293)
	at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1856)
	at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1829)
	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:722)

I'll provide the pull request URL with reproduction/verification test later.

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