IBM Support

IT23906: IBM MQ v9 .NET classes: amqmdnet.dll reports internal error, FDCwith probe ID DN121701

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APAR status

  • Closed as program error.

Error description

  • IBM MQ .NET application deployed in IIS 8 or 10.
    
    When AppPool is stopped or recycle the amqmdnet.dll
    generates internal errors. A failure data capture (FDC) record
    similar to the following is generated:
    
    Probe Id          :- DN121701
    Component         :- MQManagedReconnectableThread.Run()
    Comment1          :- ReconnectThread::Run
    Comment2          :- Thread was being aborted.
    Comment3          :-    at
    System.Threading.Monitor.ObjWait(Boolean
    exitContext, Int32 millisecondsTimeout, Objectobj)
    at IBM.WMQ.Nmqi.MQManagedReconnectableThread.BestHconn()
    at IBM.WMQ.Nmqi.MQManagedReconnectableThread.Run()
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    User of MQ .NET application in managed mode with Client
    automatic reconnection enabled
    
    
    Platforms affected:
    Windows
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A coding error in the MQ .NET client code meant that the
    reconnection thread was not being notified to end even when the
    application ends normally
    

Problem conclusion

  • The MQ .NET client code has been modified such that the
    reconnection thread will end normally after a MQDISC of all the
    connections
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v9.0 LTS   9.0.0.5
    
    The latest available 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

    IT23906

  • 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

    2018-02-12

  • Closed date

    2018-04-13

  • Last modified date

    2018-05-09

  • 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 BASE M/P

  • Fixed component ID

    5724H7261

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
09 May 2018