PI94050: HIGH CPU/HANG WITH IHS MOD_AUTH_BASIC LDAP

9.0.0.8: WebSphere Application Server traditional V9.0 Fix Pack 8
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
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
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
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
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
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
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
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
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21
9.0.5.11: WebSphere Application Server traditional Version 9.0.5.11

APAR status

• Closed as program error.

Error description

• When using mod_ldap with virtualhosts, requests may hang or caus
  
  Reported IHS version: 9.0.0.5
  Reported Operating system: Linux
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of IBM HTTP Server with mod_ldap and  *
  *                  virtual hosts.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Requests may hang, and the server may   *
  *                      exhibit high CPU, when mod_ldap is      *
  *                      used                                    *
  *                      with virtual hosts.                     *
  ****************************************************************
  * RECOMMENDATION:  Apply a fixpack containing this fix if      *
  *                  using                                       *
  *                  the affected configuration.                 *
  ****************************************************************
  mod_ldap might be found to be looping with apr_rmm_calloc()
  in the stack. The cause is that a data structure meant to be
  protected by a cross-process, cross-thread lock was accessed
  un-protected due to an error in how the lock was stored.
  

Problem conclusion

• The code was updated to ensure that the same lock is used by
  all requests accessing the cache.
  

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

• R700 PSY

     UP

• R800 PSY

     UP

• R850 PSY

     UP

• R900 PSY

     UP