IBM Support

PI67186: The value of FreeConnectionCount on the ConnectionPool MBean is not accurate when in use connections are destroyed

Fixes are available

16.0.0.3: WebSphere Application Server Liberty 16.0.0.3
16.0.0.4: WebSphere Application Server Liberty 16.0.0.4
17.0.0.1: WebSphere Application Server Liberty 17.0.0.1
17.0.0.2: WebSphere Application Server Liberty 17.0.0.2
17.0.0.3: WebSphere Application Server Liberty 17.0.0.3
17.0.0.4: WebSphere Application Server Liberty 17.0.0.4
18.0.0.1: WebSphere Application Server Liberty 18.0.0.1
18.0.0.2: WebSphere Application Server Liberty 18.0.0.2
18.0.0.3: WebSphere Application Server Liberty 18.0.0.3
18.0.0.4: WebSphere Application Server Liberty 18.0.0.4
19.0.0.1: WebSphere Application Server Liberty 19.0.0.1
19.0.0.2: WebSphere Application Server Liberty 19.0.0.2
19.0.0.3: WebSphere Application Server Liberty 19.0.0.3
19.0.0.4: WebSphere Application Server Liberty 19.0.0.4
19.0.0.5: WebSphere Application Server Liberty 19.0.0.5
19.0.0.6: WebSphere Application Server Liberty 19.0.0.6
19.0.0.7: WebSphere Application Server Liberty 19.0.0.7
19.0.0.8: WebSphere Application Server Liberty 19.0.0.8
19.0.0.9: WebSphere Application Server Liberty 19.0.0.9
19.0.0.10: WebSphere Application Server Liberty 19.0.0.10
19.0.0.11: WebSphere Application Server Liberty 19.0.0.11
19.0.0.12: WebSphere Application Server Liberty 19.0.0.12
20.0.0.1: WebSphere Application Server Liberty 20.0.0.1
20.0.0.2: WebSphere Application Server Liberty 20.0.0.2
20.0.0.3: WebSphere Application Server Liberty 20.0.0.3
20.0.0.4: WebSphere Application Server Liberty 20.0.0.4
20.0.0.5: WebSphere Application Server Liberty 20.0.0.5
20.0.0.6: WebSphere Application Server Liberty 20.0.0.6
20.0.0.7: WebSphere Application Server Liberty 20.0.0.7
20.0.0.8: WebSphere Application Server Liberty 20.0.0.8
20.0.0.9: WebSphere Application Server Liberty 20.0.0.9
20.0.0.10: WebSphere Application Server Liberty 20.0.0.10
20.0.0.11: WebSphere Application Server Liberty 20.0.0.11
20.0.0.12: WebSphere Application Server Liberty 20.0.0.12

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APAR status

  • Closed as program error.

Error description

  • When using the monitor feature (monitor-1.0) in WebSphere
    Application Server Liberty Profile with the ConnectionPool
    Mbean to monitor the number of connections in the Freepool
    via the FreeConnectionCount the value will become inaccurate
    if there are in use connections that are destroyed.  Those
    connections could either be aborted or destroyed due to
    exceptions encountered on the connection.  The reported
    number of connections in the free pool will be less than the
    actual value and the reported number may drop below zero.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server using Monitor-1.0 to monitor the     *
    *                  FreeConnectionCount                         *
    ****************************************************************
    * PROBLEM DESCRIPTION: The value of FreeConnectionCount on the *
    *                      ConnectionPool MBean is not accurate    *
    *                      when in use connections are destroyed   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When using the monitor feature (monitor-1.0) in WebSphere
    Application Server Liberty with the ConnectionPool Mbean to
    monitor the number of connections in the Freepool via the
    FreeConnectionCount the value will become inaccurate if there
    are in use connections that are destroyed.  Those connections
    could either be aborted or destroyed due to exceptions
    encountered on the connection.  The reported number of
    connections in the free pool will be less than the actual value
    and the reported number may drop below zero.
    

Problem conclusion

  • The code was changed so that the value of FreeConnectionCount
    will be accurate when in use connections are destroyed.
    
    The fix for this APAR is currently targeted for inclusion in fix
    pack 16.0.0.3.  Please refer to the Recommended Updates page for
    delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI67186

  • Reported component name

    LIBERTY PROFILE

  • Reported component ID

    5724J0814

  • Reported release

    CD0

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-08-08

  • Closed date

    2016-08-10

  • Last modified date

    2016-08-10

  • 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

    LIBERTY PROFILE

  • Fixed component ID

    5724J0814

Applicable component levels

  • RCD0 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"CD0","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
17 October 2021