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IJ12535: FDC with probe ID DN121701 reported by MQManagedReconnectableThread.Run()

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APAR status

  • Closed as program error.

Error description

  • IBM MQ .NET libraries could generate a failure data capture
    (FDC) record with the following probe when using automatic
    client reconnect to recover from a connection problem;
    
    | Probe Id          :- DN121701
    | Component         :- MQManagedReconnectableThread.Run()
    | Major Errorcode   :- 0x20009546
     Comment2          :- Collection was modified; enumeration
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users using managed .NET client applications with multiplexing
    (SHARECNV > 0) and the automatic client reconnect feature may be
    affected.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A logic error was present in the managed .NET automatic client
    reconnect client that could cause a data structure to be
    modified while the client was iterating over it, causing an
    exception to be generated when reopening queues, topics and
    subscriptions.
    

Problem conclusion

  • The IBM MQ managed .NET client reconnection logic has been
    updated to correct this error.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v9.0 LTS   9.0.0.8
    v9.1 LTS   9.1.0.3
    
    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

    IJ12535

  • Reported component name

    IBM MQ XMS V9.0

  • Reported component ID

    5724H7267

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-01-06

  • Closed date

    2019-07-31

  • Last modified date

    2019-07-31

  • 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 XMS V9.0

  • Fixed component ID

    5724H7267

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:
31 July 2019