IT24367: IBM MQ V9: The RUNMQSC process is looping intermittently, if thenew feature "RUNMQSC command line editor for Unix" is used.

APAR status

• Closed as program error.

Error description

• With IBM MQ Version 9.0.0 on Linux x86-64, if the new feature
  "runmqsc command line editor for UNIX" is used, the runmqsc
  process may intermittently become unresponsive to commands.
  
  This has been occasionally shown to happen if the network
  connection is broken to a remote terminal runmqsc session.
  
  For more information about this feature, see the IBM Knowledge
  Center topic below:
  https://www.ibm.com/support/knowledgecenter/en/SSFKSJ_9.0.0/com.
  ibm.mq.pro.doc/q113130_.htm
  

Local fix

• Disable the command recall, command completion, and Emacs
  command keys by setting the environment variable below:
  
     export MQ_OVERRIDE_LIBEDIT_LOAD=TRUE
  

Problem summary

• ****************************************************************
  USERS AFFECTED:
  MQ version 9.0 UNIX users running runmqsc and using the up/down
  arrow or tab keys to recall previous commands or access command
  completion options.
  
  
  Platforms affected:
  Linux on x86-64, Solaris x86-64, Solaris SPARC, Linux on
  zSeries, Linux on Power, HP-UX PA-RISC, HP-UX Itanium, AIX
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  Due to a programming error, the command recall/ command
  completion function could cause the program to enter an infinite
  loop and become unresponsive to key presses.
  If this occurred it would be seen that the runmqsc process is
  consuming 100% CPU cycles.
  

Problem conclusion

• The programming error has been corrected.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.0 LTS   9.0.0.6
  v9.1 CD    9.1.2
  v9.1 LTS   9.1.0.1
  
  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 M/P

• Fixed component ID

  5724H7261

Applicable component levels