IT35258: Channels remain in initializing state for longer time while starting and message build up on SYSTEM.CHANNEL.INITQ

APAR status

• Closed as program error.

Error description

• The sender/cluster sender channels stuck in initializing state
  while starting up.
  At times it takes a few minutes to start. The channel initiator
  appears to be
  taking a longer time to process messages from the
  SYSTEM.CHANNEL.INITQ and as such
  causing increase in queue depth.
  In addition, "AMQ9514E: Channel 'ChannelName' is in use." errors
  are reported in the
  queue manager error logs.
  

Local fix

• A significant increase in the disconnect interval of the cluster
  receiver/receiver channels may help
  the respective remote end to run for a prolonged period of time.
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  * All users of MQ distributed channels
  * Users using distributed channels configured with channel
  triggering and trigger type EVERY are likely to
     see this problem often.
  * Users using queue managers with several sender channels
  configured with channel triggering and cluster
     sender channels likely to be most affected by this problem.
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  A defect in handling triggered channels caused the messages to
  be processed slowly resulting in slow channel startup and high
  queue depth in SYSTEM.CHANNEL.INITQ.
  

Problem conclusion

• MQ code has been modified to resolve the problem in handling
  triggered MQ channels.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.1 LTS   9.1.0.11
  v9.2 LTS   9.2.0.2
  v9.x CD    9.2.3
  
  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 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

  5724H7271

Applicable component levels