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IT18052: ChlauthEarlyAdopt modifications

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APAR status

  • Closed as program error.

Error description

  • The ChlauthEarlyAdopt attribute was introduced under APAR
    IT12825 to allow
    a supplied user identifier to be adopted earlier in the process
    of channel
    This APAR will make a number of changes to this functionality
    across the IBM
    MQ v8 and v9 releases.

Local fix

  • N/A

Problem summary

  • ****************************************************************
    Users of the ChlauthEarlyAdopt qm.ini parameter that was
    introduced by APAR IT12825
    may be affected by this change.
    Platforms affected:
    A new qm.ini parameter ChlauthEarlyAdopt was added to IBM MQ
    under APAR IT12825.
    This parameter ensures that when ADOPTCTX(YES) is used on the
    default authentication
    information object then USERMAP channel authentication rules are
    This APAR addresses a number of issues with the
    ChlauthEarlyAdopt functionality:
    IBM MQ v8: It is not necessary to have two settings 'E' and 'Y'
    for ChlauthEarlyAdopt.
    IBM MQ v9 LTS: The functionality for ChlauthEarlyAdopt 'E' was
    missing from this release and
    so if security exits were enabled then applications may fail to
    connect to the
    queue manager.
    IBM MQ v9 LTS/CD:  ChlauthEarlyAdopt 'E' was not recognised as a
    valid option, therefore users
    with security exits who migrated to the IBM MQ v9 LTS or CD
    release and who used the
    ChlauthEarlyAdopt 'E' option in IBM MQ v8 may be unable to
    connect to the queue manager.

Problem conclusion

  • The IBM MQ v8/v9 LTS and v9 CD releases will be modified to
    correct the issues listed in this APAR:
    IBM MQ v8: The ChlauthEarlyAdopt option 'Y' is made functionally
    equivalent to option 'E'.
    IBM MQ v9 LTS: ChlauthEarlyAdopt 'E' functionality is added so
    that security exits can be
    used with ChlauthEarlyAdopt.  The ChlauthEarlyAdopt option 'Y'
    is made functionally
    equivalent to option 'E'.
    IBM MQ v9 LTS/CD: To aid with migration from IBM MQ v8 where
    ChlauthEarlyAdopt may have been
    set to 'E', the product will be changed to allow 'E' to be used
    as a synonym for 'Y'.
    The net effect across IBM MQ v8, v9 LTS and v9 CD, is that
    ChlauthEarlyAdopt 'Y' will become functionally equivalent to 'E'
    and that either option may be specified in qm.ini.
    The documentation will be updated to reflect the changes in this
    APAR and APAR IT12825 will be updated
    to reference this APAR.  In particular, mention of option 'E'
    will be removed from the documentation in order to limit
    The fix is targeted for delivery in the following PTFs:
    Version    Maintenance Level
    v9.0 CD    9.0.2
    v9.0 LTS
    The latest available maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    If the maintenance level is not yet available information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'

Temporary fix


APAR Information

  • APAR number


  • Reported component name


  • Reported component ID


  • Reported release


  • Status


  • PE




  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date


  • Closed date


  • Last modified date


  • 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


  • Fixed component ID


Applicable component levels

  • R800 PSY


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Document Information

Modified date:
03 January 2018