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IJ21718: ARIEL SEARCHES FAIL AND EVENTS ARE NOT PROCESSED/WRITTEN TO DISK WHEN A CONCURRENTMODIFICATIONEXCEPTION OCCURS

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APAR status

  • Closed as program error.

Error description

  • An uncaught ConcurrentModificationException can occur within
    the QRadar Ariel Writer thread.
    When this occurs, events received into QRadar fail to be
    processed and written to disk, and failure exceptions occur
    during ariel/event searches within QRadar.
    Messages similar to the following might be visible in
    /var/log/qradar.log when this issue is occurring:
    [ecs-ep.ecs-ep] [Ariel Writer#events]
    com.q1labs.frameworks.core.ThreadExceptionHandler: [ERROR]
    [NOT:0000003000][127.0.0.1/- -] [-/- -]Exception was uncaught
    in thread: Ariel Writer#events
    [ecs-ep.ecs-ep] [Ariel Writer#events]
    java.util.ConcurrentModificationException
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    gnu.trove.TPrimitiveIterator.nextIndex(TPrimitiveIterator.java:6
    6)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    gnu.trove.TIterator.hasNext(TIterator.java:57)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.core.types.networkevent.mapping.NetworkEventMappingUt
    ils.writeCustomProperties(NetworkEventMappingUtils.java:318)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.core.types.event.mapping.NormalizedEventMappingV2.put
    CustomProperties(NormalizedEventMappingV2.java:594)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.core.types.event.mapping.NormalizedEventMappingV2.put
    Event(NormalizedEventMappingV2.java:443)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.core.types.event.mapping.NormalizedEventMappings$Exlu
    deCachedResults.putData(NormalizedEventMappings.java:68)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.core.types.event.mapping.NormalizedEventMappingV2.put
    (NormalizedEventMappingV2.java:237)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.core.types.event.mapping.NormalizedEventMappingV2.put
    (NormalizedEventMappingV2.java:31)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.io.NIOFileWriter.write(NIOFileWriter.java:110)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.io.SimpleWriter.writeRecord(SimpleWriter.java:4
    7)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.io.BucketWriter.writeRecord(BucketWriter.java:6
    2)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.io.AbstractDatabaseWriter.put(AbstractDatabaseW
    riter.java:114)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.DatabaseWriterAsync.processRecord(DatabaseWrite
    rAsync.java:131)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.ScatteringDatabaseWriter.access$401(ScatteringD
    atabaseWriter.java:30)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.ScatteringDatabaseWriter$Node.writeRecord(Scatt
    eringDatabaseWriter.java:87)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.ScatteringDatabaseWriter$Node.processRecord(Sca
    tteringDatabaseWriter.java:55)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.ScatteringDatabaseWriter$Node.access$1100(Scatt
    eringDatabaseWriter.java:32)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.ScatteringDatabaseWriter$DataNodes.processRecor
    d(ScatteringDatabaseWriter.java:247)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.ScatteringDatabaseWriter.processRecord(Scatteri
    ngDatabaseWriter.java:450)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    com.q1labs.ariel.DatabaseWriterAsync.run(DatabaseWriterAsync.jav
    a:115)
    [ecs-ep.ecs-ep] [Ariel Writer#events]    at
    java.lang.Thread.run(Thread.java:812
    

Local fix

Problem summary

  • This issue was fixed in QRadar QRM QVM release of 7.3.2 Patch 5
    Interimfix 01 and 7.3.3 Patch 1 Interimfix 01.
    

Problem conclusion

  • This issue was fixed in QRadar QRM QVM release of 7.3.2 Patch 5
    Interimfix 01 and 7.3.3 Patch 1 Interimfix 01.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IJ21718

  • Reported component name

    QRADAR SOFTWARE

  • Reported component ID

    5725QRDSW

  • Reported release

    732

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-12-18

  • Closed date

    2020-01-22

  • Last modified date

    2020-01-22

  • 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

    QRADAR SOFTWARE

  • Fixed component ID

    5725QRDSW

Applicable component levels

[{"Business Unit":{"code":"BU048","label":"IBM Software"}, "Product":{"code":"SSBQAC","label":"IBM Security QRadar SIEM"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"732","Edition":""}]

Document Information

Modified date:
22 January 2020