Hi, The Commons Collection code throws ConcurrentModificationException when it detects error conditions. The JRE collections do the same (the ones that are not thread-safe.)
That does not help much, sorry. I'm afraid you are left with a tricky debugging session. It is _possible_ that there is a bug in Commons Collections of course. In which case, an analysis or reproducible test case would be most welcome. Also, please make sure you are using the latest version: 4.1. Thank you, Gary On Thu, Dec 28, 2017 at 12:51 PM, durairaj t <durairaj....@gmail.com> wrote: > Thank you for your response, > > I have gone through the java specifications for the same, but I just would > like to make sure that the error is not due to the "commons collections4" > API *bug*. > > On Thu, Dec 28, 2017 at 2:30 PM, Gary Gregory <garydgreg...@gmail.com> > wrote: > > > Just like it says on the Javadoc: > > https://docs.oracle.com/javase/7/docs/api/java/util/ > > ConcurrentModificationException.html > > > > One piece of code must be reading while another is writing on the > > collection. > > > > Gary > > > > On Thu, Dec 28, 2017 at 11:21 AM, durairaj t <durairaj....@gmail.com> > > wrote: > > > > > Hi All, > > > > > > I'm using comm.coll4 with JBOSS EAP sever 7.0 runtime and getting the > > below > > > error, > > > > > > I don't know whats going on, Any help? > > > > > > > > > Error Message: > > > ______________ > > > > > > Caused by: java.util.ConcurrentModificationException > > > at org.apache.commons.collections4.map.AbstractLinkedMap$LinkIt > > > erator.nextEntry(AbstractLinkedMap.java:552) > > > at org.apache.commons.collections4.map.AbstractLinkedMap$LinkMa > > > pIterator.next(AbstractLinkedMap.java:357) > > > at org.apache.commons.collections4.map.AbstractHashedMap.doWrit > > > eObject(AbstractHashedMap.java:1233) > > > at org.apache.commons.collections4.map.LinkedMap.writeObject( > > > LinkedMap.java:124) > > > at sun.reflect.GeneratedMethodAccessor36.invoke(Unknown Source) > > > at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMe > > > thodAccessorImpl.java:43) > > > at java.lang.reflect.Method.invoke(Method.java:498) > > > at org.jboss.marshalling.reflect.SerializableClass.callWriteObj > > > ect(SerializableClass.java:271) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:976) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:854) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(Ri > > > verMarshaller.java:1032) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:988) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:967) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:967) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:967) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:967) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:967) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:967) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:854) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(Ri > > > verMarshaller.java:1032) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:988) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:854) > > > at org.jboss.marshalling.river.BlockMarshaller.doWriteObject(Bl > > > ockMarshaller.java:65) > > > at org.jboss.marshalling.river.BlockMarshaller.writeObject(Bloc > > > kMarshaller.java:56) > > > at org.jboss.marshalling.MarshallerObjectOutputStream.writeObje > > > ctOverride(MarshallerObjectOutputStream.java:50) > > > at org.jboss.marshalling.river.RiverObjectOutputStream.writeObj > > > ectOverride(RiverObjectOutputStream.java:179) > > > at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344) > > > at java.util.concurrent.CopyOnWriteArrayList.writeObject(CopyOn > > > WriteArrayList.java:972) > > > at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source) > > > at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMe > > > thodAccessorImpl.java:43) > > > at java.lang.reflect.Method.invoke(Method.java:498) > > > at org.jboss.marshalling.reflect.SerializableClass.callWriteObj > > > ect(SerializableClass.java:271) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:976) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:854) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(Ri > > > verMarshaller.java:1032) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:988) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:854) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(Ri > > > verMarshaller.java:1032) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:988) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:967) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:967) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:854) > > > at org.jboss.marshalling.river.BlockMarshaller.doWriteObject(Bl > > > ockMarshaller.java:65) > > > at org.jboss.marshalling.river.BlockMarshaller.writeObject(Bloc > > > kMarshaller.java:56) > > > at org.jboss.marshalling.MarshallerObjectOutputStream.writeObje > > > ctOverride(MarshallerObjectOutputStream.java:50) > > > at org.jboss.marshalling.river.RiverObjectOutputStream.writeObj > > > ectOverride(RiverObjectOutputStream.java:179) > > > at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344) > > > at java.util.concurrent.ConcurrentHashMap.writeObject(Concurren > > > tHashMap.java:1413) > > > at sun.reflect.GeneratedMethodAccessor43.invoke(Unknown Source) > > > at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMe > > > thodAccessorImpl.java:43) > > > at java.lang.reflect.Method.invoke(Method.java:498) > > > at org.jboss.marshalling.reflect.SerializableClass.callWriteObj > > > ect(SerializableClass.java:271) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializa > > > bleObject(RiverMarshaller.java:976) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:854) > > > at org.jboss.marshalling.AbstractObjectOutput.writeObject(Abstr > > > actObjectOutput.java:58) > > > at org.jboss.marshalling.AbstractMarshaller.writeObject(Abstrac > > > tMarshaller.java:111) > > > at org.wildfly.clustering.marshalling.jboss.SimpleMarshalledVal > > > ue.getBytes(SimpleMarshalledValue.java:76) > > > at org.wildfly.clustering.marshalling.jboss.SimpleMarshalledVal > > > ueExternalizer.writeObject(SimpleMarshalledValueExternalizer.java:49) > > > at org.wildfly.clustering.marshalling.jboss.SimpleMarshalledVal > > > ueExternalizer.writeObject(SimpleMarshalledValueExternalizer.java:34) > > > at org.wildfly.clustering.infinispan.spi.marshalling.AdvancedEx > > > ternalizerAdapter.writeObject(AdvancedExternalizerAdapter.java:49) > > > at org.infinispan.marshall.core.ExternalizerTable$ForeignExtern > > > alizerAdapter.writeObject(ExternalizerTable.java:534) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:138) > > > at org.jboss.marshalling.AbstractObjectOutput.writeObject(Abstr > > > actObjectOutput.java:58) > > > at org.jboss.marshalling.AbstractMarshaller.writeObject(Abstrac > > > tMarshaller.java:111) > > > at org.infinispan.marshall.exts.ReplicableCommandExternalizer.w > > > riteCommandParameters(ReplicableCommandExternalizer.java:66) > > > at org.infinispan.marshall.exts.ReplicableCommandExternalizer.w > > > riteObject(ReplicableCommandExternalizer.java:51) > > > at org.infinispan.marshall.exts.ReplicableCommandExternalizer.w > > > riteObject(ReplicableCommandExternalizer.java:39) > > > at org.infinispan.marshall.core.ExternalizerTable$ExternalizerA > > > dapter.writeObject(ExternalizerTable.java:485) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:138) > > > at org.jboss.marshalling.AbstractObjectOutput.writeObject(Abstr > > > actObjectOutput.java:58) > > > at org.jboss.marshalling.AbstractMarshaller.writeObject(Abstrac > > > tMarshaller.java:111) > > > at org.infinispan.marshall.exts.ReplicableCommandExternalizer.w > > > riteCommandParameters(ReplicableCommandExternalizer.java:66) > > > at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.mar > > > shallParameters(CacheRpcCommandExternalizer.java:128) > > > at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.wri > > > teObject(CacheRpcCommandExternalizer.java:112) > > > at org.infinispan.marshall.exts.CacheRpcCommandExternalizer.wri > > > teObject(CacheRpcCommandExternalizer.java:68) > > > at org.infinispan.marshall.core.ExternalizerTable$ExternalizerA > > > dapter.writeObject(ExternalizerTable.java:485) > > > at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(Ri > > > verMarshaller.java:138) > > > at org.jboss.marshalling.AbstractObjectOutput.writeObject(Abstr > > > actObjectOutput.java:58) > > > at org.jboss.marshalling.AbstractMarshaller.writeObject(Abstrac > > > tMarshaller.java:111) > > > at org.infinispan.commons.marshall.jboss.AbstractJBossMarshalle > > > r.objectToObjectStream(AbstractJBossMarshaller.java:72) > > > at org.infinispan.marshall.core.VersionAwareMarshaller.objectTo > > > Buffer(VersionAwareMarshaller.java:77) > > > at org.infinispan.commons.marshall.AbstractMarshaller.objectToB > > > uffer(AbstractMarshaller.java:41) > > > at org.infinispan.commons.marshall.AbstractDelegatingMarshaller > > > .objectToBuffer(AbstractDelegatingMarshaller.java:85) > > > at org.infinispan.remoting.transport.jgroups.MarshallerAdapter. > > > objectToBuffer(MarshallerAdapter.java:23) > > > at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDis > > > patcher.marshallCall(CommandAwareRpcDispatcher.java:256) > > > at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDis > > > patcher.processSingleCall(CommandAwareRpcDispatcher.java:274) > > > at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDis > > > patcher.invokeRemoteCommand(CommandAwareRpcDispatcher.java:130) > > > ... 60 more > > > Caused by: an exception which occurred: > > > in field children > > > in field reporter > > > in field messages > > > in field feedbackMessages > > > in object java.util.concurrent.ConcurrentHashMap@2accdfac > > > in object org.wildfly.clustering.marshalling.jboss.SimpleMarshalledVal > > > ue@2accdfac > > > in object org.infinispan.commands.write.PutKeyValueCommand@62e75532 > > > in object org.infinispan.commands.remote.SingleRpcCommand@bfef9aa > > > > > >
