IBM Support

IT25426: AMQ9772 error MQRC_RESOURCE_PROBLEM MQRC 2102 when connecting application on Windows

Subscribe to this APAR

By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available. You can track this item individually or track all items by product.

Notify me when this APAR changes.

Notify me when an APAR for this component changes.

 

APAR status

  • Closed as program error.

Error description

  • When connecting an application to a queue manager running on
    Windows, the connection fails with MQRC_RESOURCE_PROBLEM if the
    server is under high load.
    
    In this scenario, the error log shows:
    AMQ9772: MQCTL failed with MQRC=2102.
    Explanation: The indicated IBM MQ API call failed for the
    specified reason code.
    
    MQ trace of the problem shows xecX_E_RESOURCE_ERROR from call to
    xcsConnectSimplePipe, with an "all instances busy" message,
    similar to below:
    
    --------------{  xcsConnectSimplePipe
    ---------------{  xcsGetMemFn
    component:24 function:466 length:328 options:0 cbmindex:0
    *pointer:0000003D3DB3DBB0
    ---------------}  xcsGetMemFn (rc=OK)
    Pipe \\.\pipe\mqm.1.qmgrs.<QMNAME>.4.pipe.signalapp all
    instances busy (231)
    ---------------{  xcsFreeMemFn
    component:24 pointer:0000003D3DB3DBB0
    cbmindex:0
    ---------------}  xcsFreeMemFn (rc=OK)
    --------------}! xcsConnectSimplePipe (rc=xecX_E_RESOURCE_ERROR)
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users who are connecting a high volume of applications to a
    queue manager on Windows.
    
    The issue was observed when connecting a large number of
    server-bound MQ applications, but could in theory affect channel
    programs if a large volume of channel agents were started
    concurrently.
    
    
    Platforms affected:
    Windows
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    In the event of contention for internal IPC resources, it is
    expected that these attempts are retried for a period of 30
    seconds. A programming error resulting in a timing window
    whereby the MQ queue manager could fail to retry all requests
    correctly if contention was detected.
    

Problem conclusion

  • MQ now allows the full retry period to expire before timing out
    the connection with MQRC_RESOURCE_PROBLEM.
    
    MQRC_RESOURCE_PROBLEM will continue to be output with additional
    appropriate information if connections cannot be accepted due to
    system resource issues.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v9.0 LTS   9.0.0.6
    v9.1 CD    9.1.2
    v9.1 LTS   9.1.0.2
    
    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

    IT25426

  • 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

    2018-06-20

  • Closed date

    2019-01-31

  • Last modified date

    2019-01-31

  • 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 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:
31 January 2019