IBM Support

IT27846: MQRC_BUFFER_LENGTH_ERROR (2005) error message when displaying authority records in the MQ Explorer

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APAR status

  • Closed as program error.

Error description

  • When attempting to view authority records for an MQ object using
    the MQ Explorer by right-clicking on a named object, such as a
    queue, then choosing:
      Object Authorities
        Managed Authority Records...
          Specific Profiles
    an error message is displayed with the message text:
      An unexpected error (2005) has occurred. (AMQ4999)
    The object authority records for the users and groups are then
    not displayed.

Local fix

Problem summary

  • ****************************************************************
    This issue affects users who configure MQ queue managers to use
    LDAP authorization with Distinguished Names.
    Platforms affected:
    When using the MQ Explorer to view authority records for an MQ
    object, such as a queue, a PCF message is sent to the command
    server of the target queue manager.  The command server queries
    the queue manager for the requested information and returns it
    in a PCF response message to a temporary dynamic queue created
    by the MQ Explorer.
    In order to query authority record information for an MQ object,
    the command server allocated a buffer it expected to be large
    enough to contain a complete record.  However, when using LDAP
    with long Distinguished Names for authorization to MQ objects,
    the default allocated buffer size may not be large enough in
    some cases.  If the buffer is not large enough to contain an
    authority record instance, the queue manager kernel returns the
    reason code MQRC_BUFFER_LENGTH_ERROR (2005) and the size of the
    authority record to the command server.  The command server did
    not expect this and returned this error code in the PCF response
    message sent to the MQ Explorer.  This resulted in the MQ
    Explorer displaying an error message reporting the
    MQRC_BUFFER_LENGTH_ERROR return code to the user.

Problem conclusion

  • The command server logic has been updated such that if the queue
    manager kernel returns the reason code MQRC_BUFFER_LENGTH_ERROR
    when querying an authority record, the command server allocates
    a larger buffer capable of containing the complete authority
    record and retrying the operation.
    The fix is targeted for delivery in the following PTFs:
    Version    Maintenance Level
    v9.0 LTS
    v9.1 CD    9.1.3
    v9.1 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

[{"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":"LOB45","label":"Automation"}}]

Document Information

Modified date:
22 March 2019