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Posted to issues@commons.apache.org by "Thomas Vandahl (Jira)" <ji...@apache.org> on 2020/04/11 10:14:00 UTC
[jira] [Commented] (JCS-198) ConcurrentException in update of
RemoteAuxiliaryCache
[ https://issues.apache.org/jira/browse/JCS-198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17081228#comment-17081228 ]
Thomas Vandahl commented on JCS-198:
------------------------------------
That looks very much like the case described [here|https://blogs.oracle.com/csoto/javautilconcurrentmodificationexception-when-serializing-non-thread-safe-maps] Would you please try to verify this?
> ConcurrentException in update of RemoteAuxiliaryCache
> -----------------------------------------------------
>
> Key: JCS-198
> URL: https://issues.apache.org/jira/browse/JCS-198
> Project: Commons JCS
> Issue Type: Bug
> Components: RMI Remote Cache
> Affects Versions: jcs-2.2
> Reporter: Renato
> Priority: Critical
>
> We have the same application that runs on two distinct node. This application is basically a rest statefull service that uses a Remote JCS cache in order to share sessions, but frequently we got the following excpetion:
>
> ERROR RemoteCache:141 - Disabling remote cache due to error: Failed to put [fe3e6602-d2bb-497d-b2bc-3a809d9b0d3f] to
> navigationdata
> java.util.ConcurrentModificationException
> at java.util.HashMap$HashIterator.nextNode(HashMap.java:1442)
> at java.util.HashMap$KeyIterator.next(HashMap.java:1466)
> at java.util.HashSet.writeObject(HashSet.java:287)
> at sun.reflect.GeneratedMethodAccessor173.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1140)
> at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
> at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> at java.util.HashMap.internalWriteEntries(HashMap.java:1790)
> at java.util.HashMap.writeObject(HashMap.java:1363)
> at sun.reflect.GeneratedMethodAccessor175.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1140)
> at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
> at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
> at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
> at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> at java.util.ArrayList.writeObject(ArrayList.java:766)
> at sun.reflect.GeneratedMethodAccessor172.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1140)
> at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
> at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
> at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
> at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> at org.apache.commons.jcs.utils.serialization.StandardSerializer.serialize(StandardSerializer.java:55)
> at org.apache.commons.jcs.utils.serialization.SerializationConversionUtil.getSerializedCacheElement(SerializationConversionUtil.java:74)
> at org.apache.commons.jcs.auxiliary.remote.AbstractRemoteAuxiliaryCache.processUpdate(AbstractRemoteAuxiliaryCache.java:421)
> at org.apache.commons.jcs.auxiliary.AbstractAuxiliaryCacheEventLogging.updateWithEventLogging(AbstractAuxiliaryCacheEventLogging.java:65)
> at org.apache.commons.jcs.auxiliary.AbstractAuxiliaryCacheEventLogging.update(AbstractAuxiliaryCacheEventLogging.java:50)
> at org.apache.commons.jcs.engine.CacheAdaptor.handlePut(CacheAdaptor.java:96)
> at org.apache.commons.jcs.engine.AbstractCacheEventQueue$PutEvent.doRun(AbstractCacheEventQueue.java:362)
> at org.apache.commons.jcs.engine.AbstractCacheEventQueue$AbstractCacheEvent.run(AbstractCacheEventQueue.java:281)
> at org.apache.commons.jcs.engine.CacheEventQueue$QProcessor.run(CacheEventQueue.java:228)
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