IBM Support

IT27723: MQINPUT NODE DOES NOT COMPLETE READING A BATCH OF VARIABLE LENGTH MQ GROUP MESSAGES

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APAR status

  • Closed as program error.

Error description

  • A message flow processing a batch of variable length MQ
    messages as an MQ group may stop picking up messages from the
    input queue even though all the messages in the group are
    available and have the correct logical message sequence
    numbers.
    
    This will only occur if some of the variable sized MQ messages
    are greater than 102400 bytes in length.
    
    This is due to APAR PI90759 that was added in Fix Pack 12 of
    IBM Integration Bus v10 (IIB 10.0.0.12).
    
    Additional Symptom(s) Search Keyword(s):
    

Local fix

  • Set or export the environment variable
    MQSI_MQINPUT_BUFFER_MONITORING_THRESHOLD to a value greater
    than the length of the longest message in the group.
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of IBM Integration Bus V10 and IBM App Connect
    Enterprise V11 using MQ message groups.
    
    
    Platforms affected:
    z/OS, MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A message flow processing a batch of variable length MQ messages
    as an MQ group may stop picking up messages from the input queue
    even though all the messages in the group are available and have
    the correct logical message sequence numbers.
    
    This will only occur if some of the variable sized MQ messages
    are greater than 102400 bytes in length.
    
    This is due to APAR PI90759 that was added in Fix Pack 12 of IBM
    Integration Bus v10 (IIB 10.0.0.12).
    

Problem conclusion

  • The MQInput node will no longer resize the MQ buffer, which
    involves disconnecting from the queue manager, when in the
    middle of processing an MQ group of messages.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v10.0      10.0.0.17
    v11.0      11.0.0.5
    
    The latest available maintenance can be obtained from:
    http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
    
    If the maintenance level is not yet available,information on
    its planned availability can be found on:
    http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT27723

  • Reported component name

    INTEGRATION BUS

  • Reported component ID

    5724J0540

  • Reported release

    A00

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-01-10

  • Closed date

    2019-06-26

  • Last modified date

    2019-06-26

  • 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

    INTEGRATION BUS

  • Fixed component ID

    5724J0540

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSNQK6","label":"IBM Integration Bus"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"10.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
26 June 2019