IT36898: IBM MQ Appliance reloads due to watchdog restart.

APAR status

• Closed as program error.

Error description

• MQ Appliance reloads following watchdog restart with the
  following error captured in decoded
  backtrace with  __GI___libc_read  at the top of the stack.
  
  WATCHDOG RESTART is detected.
  Died from signal 12 (USR2)
  Reason Hint: [WATCHDOG]
  Referencing 0x0000000000000000 at 0x7f0e89f792ed in
  __GI___libc_read + 0x2d
  Signal is sent by PID: 350 UID: 0 Process: [main]
  Component=_SourceProtocol, Domain=_NoDomain
  Action=62, ActionName=default-api-result
  
  #0    0x7f0e89f792ed in __GI___libc_read + 0x2d
  #1    0x02aacce3 in read + 0x73
  #2    0x7f0e8c2c0f55 in sock_read + 0x35
  #3    0x7f0e8c2beb4d in BIO_read + 0x6d
  #4    0x7f0e8c6480f5 in ssl3_read_n + 0x165
  #5    0x7f0e8c649c4f in ssl3_read_bytes + 0x74f
  #6    0x7f0e8c646534 in ssl3_read + 0x54
  #7    0x00d52b68 in drSSLRead
  ...
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  All MQ Appliance users
  
  
  Platforms affected:
  MultiPlatform
  
  ****************************************************************
  PROBLEM DESCRIPTION:
  If the client is slow or hung while sending network traffic to
  the MQ Appliance then a restart can be triggered.
  

Problem conclusion

• The MQ Appliance code has been modified to handle this slowness
  in the connected clients.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
  Version    Maintenance Level
  v9.2 LTS   9.2.0.4
  v9.x CD    9.2.4
  
  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

  MQ APPL M2002 V

• Fixed component ID

  5737H4701

Applicable component levels