PI70022: ALLOW IBM HTTP SERVER ON LINUX TO AUTOMATICALLY RAISE ULIMIT -N TO ACCOMODATE LARGER THREADSPERCHILD

9.0.0.2: WebSphere Application Server traditional V9.0 Fix Pack 2
9.0.0.3: WebSphere Application Server traditional V9.0 Fix Pack 3
9.0.0.4: WebSphere Application Server traditional V9.0 Fix Pack 4
9.0.0.5: WebSphere Application Server traditional V9.0 Fix Pack 5
9.0.0.6: WebSphere Application Server traditional V9.0 Fix Pack 6
9.0.0.7: WebSphere Application Server traditional V9.0 Fix Pack 7
9.0.0.8: WebSphere Application Server traditional V9.0 Fix Pack 8
9.0.0.9: WebSphere Application Server traditional V9.0 Fix Pack 9
9.0.0.10: WebSphere Application Server traditional V9.0 Fix Pack 10
9.0.0.11: WebSphere Application Server traditional V9.0 Fix Pack 11
9.0.5.0: WebSphere Application Server traditional Version 9.0.5 Refresh Pack
9.0.5.1: WebSphere Application Server traditional Version 9.0.5 Fix Pack 1
9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
9.0.5.4: WebSphere Application Server traditional Version 9.0.5 Fix Pack 4
9.0.5.5: WebSphere Application Server traditional Version 9.0.5 Fix Pack 5
WebSphere Application Server traditional 9.0.5.6
9.0.5.7: WebSphere Application Server traditional Version 9.0.5 Fix Pack 7
9.0.5.8: WebSphere Application Server traditional Version 9.0.5.8
9.0.5.9: WebSphere Application Server traditional Version 9.0.5.9
9.0.5.10: WebSphere Application Server traditional Version 9.0.5.10
9.0.5.11: WebSphere Application Server traditional Version 9.0.5.11

APAR status

• Closed as program error.

Error description

• After raising ThreadsPerChild or MaxClients, the server reports
  following error:
  
  (11)Resource temporarily unavailable: apr_thread_create: unable
  create worker thread
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of IBM HTTP Server 9.0 on Linux       *
  ****************************************************************
  * PROBLEM DESCRIPTION: Thread creation errors may occur if     *
  *                      the ulimit -n value is not large        *
  *                      enough for the ThreadsPerChild setting  *
  ****************************************************************
  * RECOMMENDATION:  Apply this fix if using IBM HTTP Server     *
  *                  9.0 on Linux                                *
  ****************************************************************
  If the current soft limit for RLIMIT_NPROC looks to be less
  than MaxClients (MaxRequestWorkers), raise it to the
  corresponding hard limit at startup.
  

Problem conclusion

• IBM HTTP Server will now automatically raise ulimit -n if
  needed to accomodate larger ThreadsPerChild values.
  
  This fix is targeted for IBM HTTP Server fix packs:
  - 9.0.0.2
  

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

  IBM HTTP SERVER

• Fixed component ID

  5724J0801

Applicable component levels

• R900 PSY

     UP