PM68347: Z/OS IHS CONFIG FOR VERSIONS PRIOR TO 8.5 MAY NOT MIGRATE AS EXPECTED TO 8.5

8.5.0.2: WebSphere Application Server V8.5 Fix Pack 2

APAR status

• Closed as program error.

Error description

• If your have an existing V8.0.or below httpd.conf and have
  tuned IBM HTTP Server with an IfModule container like the
  following...
  
  <IfModule worker.c>
  ServerLimit       30
  ThreadLimit     1000
  MaxClients     30000
  ThreadsPerChild 1000
  [...]
  </IfModule
  
  That section of the config will be ignored because event.c is
  used instead of worker.c for z/OS IHS 8.5 and newer.
  Both names are Apache internals and not something you are
  expected to keep track of.  The net result is likely to be that
  IHS starts fine but uses internal default parameters due to the
  name mismatch.  IHS then may have far fewer threads and
  processes configured than you intended, which could lead to
  poor performance or a bottleneck on a busy IHS server. New
  V8.5 or above users are unaffected because they will get a new
  httpd.conf file containing event.c.
  

Local fix

• Modify the httpd.conf before using with IHS 8.5.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users migrating to IBM HTTP Server V8.5     *
  *                  from earlier releases                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: Tuning directives in <IfModule          *
  *                      worker.c> containers are ignored        *
  *                      because IBM HTTP Server V8.5 uses the   *
  *                      event.c MPM instead of worker.c.        *
  ****************************************************************
  * RECOMMENDATION:  Apply this fix                              *
  ****************************************************************
  Tuning directives in <IfModule worker.c> containers are ignored
  because IBM HTTP Server V8.5 uses the event.c MPM instead of
  worker.c.
  

Problem conclusion

• When IBM HTTP Server V8.5 and above is started, the chk_links
  scripts will check the config file and httpd.conf.default for
  lines containing <IfModule worker.c>.  If they are found, the
  file will be edited to change these lines to <IfModule
  event.c>.
  
  This fix is targeted for IHS fixpack:
  - 8.5.0.2
  

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

  WAS IHS ZOS

• Fixed component ID

  5655I3510

Applicable component levels

• R850 PSY

     UP