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IT23519: Failure to get message through an SSL/TLS channel with compression enabled

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APAR status

  • Closed as program error.

Error description

  • MQ client/server fails to get a message through an SSL/TLS
    channel with compression enabled
    The following error is reported on the client side:
        Probe Id          :- RM504002
        Component         :- rriDecompress
        -----------------------------------
        MQM Function Stack
        MQGET
        MQGET
        reqMakeCall
        rriDecompress
        xcsFFST
    

Local fix

  • Disable compression on the channel
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All the post- v8 client/server receiving messages from pre- v8
    client/server
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    When using SSL/TLS clients earlier than MQ v8, a logic error
    meant that an incorrect maximum transmission size was negotiated
    between the client and server when using compression. This could
    cause the connection to fail, as insufficient space was
    available to store the decompressed data.
    

Problem conclusion

  • The MQ queue manager has been modified to negotiate an
    appropriate maximum transmission size when dealing with clients
    using compression.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.10
    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

    IT23519

  • Reported component name

    IBM MQ BASE MP

  • Reported component ID

    5724H7251

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-12-15

  • Closed date

    2018-04-27

  • Last modified date

    2018-04-27

  • 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 MP

  • Fixed component ID

    5724H7251

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":"8.0.0.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
27 April 2018