IBM Support

IT25113: MQ MFT agent abend with NullPointerException probe ABEND_001

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APAR status

  • Closed as program error.

Error description

  • Managed File Transfer agent abend when starting up a Resource
    Monitor during agent shutdown. The abend occurs due to a
    java.lang.NullPointerException and an abend FDC is generated:
    
    Class:        com.ibm.wmqfte.thread.FTEThread
    Instance:    d34c8909
    Method:     uncaughtException
    Probe:        ABEND_001
    Cause:       java.lang.NullPointerException
    java.lang.NullPointerException
     at
    com.ibm.wmqfte.monitor.management.MonitorPublication.getPublicat
    ionXML(MonitorPublication.java:94)
     at
    com.ibm.wmqfte.monitor.management.MonitorManager.startMonitor(Mo
    nitorManager.java:652)
     at
    com.ibm.wmqfte.monitor.management.MonitorManager.registerMonitor
    (MonitorManager.java:940)
     at
    com.ibm.wmqfte.monitor.management.MonitorManager.recoveryMonitor
    (MonitorManager.java:781)
     at
    com.ibm.wmqfte.agent.AgentRecoveryRunnable.recoverResourceMonito
    r(AgentRecoveryRunnable.java:851)
     at
    com.ibm.wmqfte.agent.AgentRecoveryRunnable.run(AgentRecoveryRunn
    able.java:225)
     at java.lang.Thread.run(Thread.java:785)
     at com.ibm.wmqfte.thread.FTEThread.run(FTEThread.java:70)
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    This issue affects users of IBM MQ Managed File Transfer who use
    resource monitors.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    This problem occurred due to a timing window when an MFT agent
    was shutting down, and starting up a MFT resource monitor (RM)
    at the same time. These two operations were executed under
    separate threads within the agent. The shutdown thread removed
    the object that represented an instance of the RM, while the
    recovery thread tried to start the RM using the removed object.
    This resulted in a  java.lang.NullPointerException, which caused
    the agent to abend.
    

Problem conclusion

  • IBM MQ Managed File Transfer has been updated so that if an MFT
    agent is shutting down, it will not attempt to start a Resource
    Monitor.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v9.0 LTS   9.0.0.6
    v9.1 CD    9.1.1
    v9.1 LTS   9.1.0.1
    
    The latest available MQ maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
    
    If the maintenance level is not yet available information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT25113

  • Reported component name

    IBM MQ BASE M/P

  • Reported component ID

    5724H7261

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-05-21

  • Closed date

    2018-07-18

  • Last modified date

    2018-08-29

  • 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

    IBM MQ MFT V9.0

  • Fixed component ID

    5724H7262

Applicable component levels

[{"Business Unit":{"code":"BU050","label":"BU NOT IDENTIFIED"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Edition":""}]

Document Information

Modified date:
29 August 2018