PH20448: IHS CRASH ON RESTART WHEN PLUGIN LOG ROTATION IS ENABLED

8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3

APAR status

• Closed as program error.

Error description

• IHS will crash on a restart when the WAS PLugin is configured
  for Log rotation using piped logger.
  IHS error log might report
  crash like below :
  [Mon Dec 09 15:05:29.929585 2019]
  [was_ap24:notice] [pid 108389] [09/Dec/2019:15:05:29.92956]
  0001a765 b0003740 - DEBUG: ws_config: configDestroy: Destroyed
  the config
  *** Error in `/opt/WebSphere/HTTPServer/bin/httpd':
  double free or corruption (!prev): 0x0000000000b4b410
  ***
  ======= Backtrace: =========
  /lib64/libc.so.6(+0x816b9)[0x7f
  d0aeffa6b9]
  /opt/WebSphere/Plugins/bin/64bits/mod_was_ap24_http.
  so(logClose+0x29)[0x7fd0ad065cb7]
  /opt/WebSphere/Plugins/bin/64b
  its/mod_was_ap24_http.so(+0x2164d)[0x7fd0ad04064d]
  /opt/WebSpher
  e/HTTPServer/lib/libapr-1.so.0(+0x1ba1d)[0x7fd0afbc1a1d]
  /opt/We
  bSphere/HTTPServer/lib/libapr-1.so.0(apr_pool_clear+0x3e)[0x7fd0
  afbc266e]
  /opt/WebSphere/HTTPServer/bin/httpd(main+0x5db)[0x42cd
  4b]
  /lib64/libc.so.6(__libc_start_main+0xf5)[0x7fd0aef9b545]
  /op
  t/WebSphere/HTTPServer/bin/httpd(apr_bucket_mmap_make+0x61)[0x42
  ba49]
  ======= Memory map: ========
  00400000-0048a000 r-xp
  00000000 fd:0a 25503451
  /opt/WebSphere/HTTPServer/bin/httpd
  00589000-0058e000 rw-p
  00089000 fd:0a 25503451 /opt/WebSphere/HTTPServer/bin/httpd
  

Local fix

• Workaround : Do a stop and start
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: IHS crashes with Plugin log rotation    *
  *                      enabled                                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  IHS will crash if a restart is issued and the plugin is
  configured to use the IHS piped logger for log rotation
  

Problem conclusion

• The plugin has been fixed to eliminate the situation causing
  the crash under these circumstances.
  
  The fix for this APAR is targeted for inclusion in fix pack
  8.5.5.17 & 9.0.5.3.  For more information, see
  'Recommended Updates for WebSphere Application Server':
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

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

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R850 PSY

     UP

• R900 PSY

     UP