IBM Support

SE54019: TURN OFF SSL SESSION CACHING IN WMQ ON IBM I

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • SSL Session caching should be turned off for WMQ on i. Session
    caching is not enabled elsewhere in MQ. Also, typical MQ
    conversations would not take advantage of the benefits provided
    by SSL Session Caching.
    
    Caching enabled on i is an inefficient use of memory in this
    case.
    

Local fix

Problem summary

  • PROBLEM SUMMARY:
    ****************************************************************
    USERS AFFECTED:
    WMQ on IBM i users initiating large numbers of SSL connections
    over an extended period of time.
    
    Platforms affected:
    iSeries
    
    ****************************************************************
    PROBLEM SUMMARY:
    When a large volume of SSL connections from a non-IBM i system
    are made with WMQ to an IBM i system, after a period of time,
    memory utilization and faulting can lead to problems with TCP on
    IBM i. This is due to SSL session caching being enabled on IBM i
    for WMQ but not on other platforms.
    

Problem conclusion

  • WMQ code on IBM i has been modified to disable SSL session
    caching.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.0
    Platform           Fix Pack 7.0.1.10
    --------           --------------------
    iSeries            7.0.1.10
    
                       v7.1
    Platform           Fix Pack 7.1.0.3
    --------           --------------------
    iSeries            7.1.0.3
    
    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

    SE54019

  • Reported component name

    WMQ ISERIES V7

  • Reported component ID

    5724H7226

  • Reported release

    701

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2012-11-16

  • Closed date

    2012-11-29

  • Last modified date

    2012-11-29

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Modules/Macros

  • RCHMGR
    

Fix information

  • Fixed component name

    WMQ ISERIES V7

  • Fixed component ID

    5724H7226

Applicable component levels

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCPQ63","label":"APAR \/ Maintenance"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
27 April 2020