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PM98601: The ObjectGridRuntimeException exception occurs during failover to another server, without losing the session connection.

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APAR status

  • Closed as program error.

Error description

  • When trace is enabled with ObjectGridXDF*=all=enabled, the
    following FFDC record is displayed:
    
    FFDC
    Exception:com.ibm.websphere.objectgrid.ObjectGridRuntimeExceptio
    n
    SourceId:com.ibm.ws.objectgrid.server.impl.ServerCoreEventProces
    sor.proc  essCommand ProbeId:890
    com.ibm.websphere.objectgrid.ObjectGridRuntimeException:
    com.ibm.ws.objectgrid.MissingSerializationInfoException:
    Metadata for  typeId 646; domainHashCode=-23409929 could not be
    found.  The metadata may not have yet replicated from a foreign
    domain.
    at
    com.ibm.ws.objectgrid.datagrid.BaseAgentCommand.setBaseMap(BaseA
    gentComm   and.java:172)
    at
    com.ibm.ws.objectgrid.server.impl.ServerCoreEventProcessor.proc
    e ssCommand(ServerCoreEventProcessor.java:1446)
    
    at
    com.ibm.ws.objectgrid.server.impl.ServerCoreEventProcessor.proce
    ssClientServerRequest(ServerCoreEventProcessor.java:2591)
    
    at
    com.ibm.ws.objectgrid.server.impl.ShardImpl.processMessage(Shard
    Impl.java:1498)
    at
    com.ibm.ws.objectgrid.server.impl.ShardActor.handleContainerMess
    age(ShaedActor.java:469)
    
    at
    com.ibm.ws.objectgrid.server.impl.ShardActor.receive(ShardActor.
    java:323)
    
    at
    com.ibm.ws.xsspi.xio.actor.XIOReferable.dispatch(XIOReferable.ja
    va:114)
    
    at
    com.ibm.ws.xsspi.xio.actor.XIORegistry.sendToTarget(XIORegistry.
    java:968
    )
    
    at
    
    
    com.ibm.ws.xs.xio.transport.channel.XIORegistryRunnable.run(XIOR
    egistryR
    unnable.java:84)
    
    at
    
    
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExec
    utor.java:1156)
    
    at
    
    
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExe
    cutor.java:626)
    
    at
    
    
    com.ibm.ws.objectgrid.thread.XSThreadPool$Worker.run(XSThreadPoo
    l.java:309)
    
    Caused by:
    com.ibm.ws.objectgrid.MissingSerializationInfoException:
    Metadata for typeId 646; domainHashCode=-23409929 could not
    be found.
    The metadata may not have yet replicated from a foreign
    domain.
    at
    
    
    com.ibm.ws.objectgrid.xdf.SerializerFactory.getDescriptorFromID(
    Serializ
    erFactory.java:561)
    
    at
    
    
    com.ibm.ws.objectgrid.xdf.XDFSerializerPlugin.inflateDataObject(
    XDFSeria
    lizerPlugin.java:307)
    
    at
    
    
    com.ibm.ws.objectgrid.datagrid.BaseAgentCommand.inflateAgent(Bas
    eAgentCo
    mmand.java:304)
    
    at
    
    
    com.ibm.ws.objectgrid.datagrid.BaseAgentCommand.setBaseMap(BaseA
    gentComm
    and.java:165)
    
    ... 11 more
    
    --> FFDC
    Exception:com.ibm.websphere.objectgrid.ObjectGridRuntimeExceptio
    n
    
    SourceId:com.ibm.ws.objectgrid.server.impl.ServerCoreEventProces
    sor.proc
    essCommand ProbeId:890
    
    com.ibm.websphere.objectgrid.ObjectGridRuntimeException:
    
    com.ibm.ws.objectgrid.MissingSerializationInfoException:
    Metadata for
    typeId 646; domainHashCode=-23409929 could not be found.
    The metadata
    may not have yet replicated from a foreign domain.
    
    at
    
    
    com.ibm.ws.objectgrid.datagrid.BaseAgentCommand.setBaseMap(BaseA
    gentComm
    and.java:172)
    
    at
    
    
    com.ibm.ws.objectgrid.server.impl.ServerCoreEventProcessor.proce
    ssComman
    d(ServerCoreEventProcessor.java:1446)
    
    at
    
    
    com.ibm.ws.objectgrid.server.impl.ServerCoreEventProcessor.proce
    ssClient
    ServerRequest(ServerCoreEventProcessor.java:2591)
    
    at
    
    
    com.ibm.ws.objectgrid.server.impl.ShardImpl.processMessage(Shard
    Impl.jav
    a:1498)
    
    at
    
    
    com.ibm.ws.objectgrid.server.impl.ShardActor.handleContainerMess
    age(Shar
    dActor.java:469)
    
    at
    
    
    com.ibm.ws.objectgrid.server.impl.ShardActor.receive(ShardActor.
    java:323
    )
    
    at
    
    
    com.ibm.ws.xsspi.xio.actor.XIOReferable.dispatch(XIOReferable.ja
    va:114)
    at
    
    
    com.ibm.ws.xsspi.xio.actor.XIORegistry.sendToTarget(XIORegistry.
    java:968
    )
    
    at
    
    
    com.ibm.ws.xs.xio.transport.channel.XIORegistryRunnable.run(XIOR
    egistryR
    unnable.java:84)
    
    at
    
    
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExec
    utor.jav
    a:1156)
    
    at
    
    
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExe
    cutor.ja
    va:626)
    
    at
    
    
    com.ibm.ws.objectgrid.thread.XSThreadPool$Worker.run(XSThreadPoo
    l.java:3
    09)
    
    Caused by:
    com.ibm.ws.objectgrid.MissingSerializationInfoException:
    Metadata for typeId 646; domainHashCode=-23409929 could not
    be found.
    The metadata may not have yet replicated from a foreign
    domain.
    at
    
    
    com.ibm.ws.objectgrid.xdf.SerializerFactory.getDescriptorFromID(
    Serializ
    erFactory.java:561)
    
    at
    
    
    com.ibm.ws.objectgrid.xdf.XDFSerializerPlugin.inflateDataObject(
    XDFSeria
    lizerPlugin.java:307)
    
    at
    
    
    com.ibm.ws.objectgrid.datagrid.BaseAgentCommand.inflateAgent(Bas
    eAgentCo
    mmand.java:304)
    
    at
    
    
    com.ibm.ws.objectgrid.datagrid.BaseAgentCommand.setBaseMap(BaseA
    gentComm
    and.java:165)
    

Local fix

  • No
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  WebSphere eXtreme Scale users who are       *
    *                  running with eXtreme data  format (XDF)     *
    *                  serialization.  This serialization is       *
    *                  enabled when IBM eXtremeIO (XIO) is         *
    *                  configured and the CopyMode attribute in    *
    *                  the                                         *
    *                  backingMap element of the ObjectGrid        *
    *                  descriptor XML file is set to               *
    *                  COPY_TO_BYTES.                              *
    ****************************************************************
    * PROBLEM DESCRIPTION: When array field is processed after a   *
    *                      container server failover, a            *
    *                      MissingSerializationException exception *
    *                      might occur.                            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The internal XDF metadata cannot resolve the base type for an
    array field.  As a result, a MissingSerializationException
    exception occurs incorrectly.  The metadata is available, but
    the
    wrong data is being used to resolve the type.
    

Problem conclusion

  • This issue is typically observed after a failover has occurred
    and new array data types are introduced into the system
    after the base type has been used.  For example, you serialized
    a value with the class type of Customer. A failover to a contain
    server occurs, followed by an attempt to serialize an
    array of Customer objects.  When the Customer[] was
    deserialized by a new client, the base type is not correctly
    identified, which causes a MissingSerializationException
    exception.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM98601

  • Reported component name

    XD EXTREME SCAL

  • Reported component ID

    5724J3402

  • Reported release

    860

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-10-07

  • Closed date

    2013-10-29

  • Last modified date

    2013-10-29

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    WS EXTREME SCAL

  • Fixed component ID

    5724X6702

Applicable component levels

  • R860 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSTVLU","label":"WebSphere eXtreme Scale"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"860","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
29 October 2013