PI35473: THERE IS A SYNCHRONIZATION ISSUE WITH QUIESCE AND THE SERVER UP AND DOWN COMMANDS.

8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
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
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• THERE IS A SYNCHRONIZATION ISSUE WITH QUIESCE AND THE SERVER UP
  AND DOWN COMMANDS.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server Load       *
  *                  Balancer for ipv4 and ipv6 users            *
  ****************************************************************
  * PROBLEM DESCRIPTION: Incorrect server status can occur       *
  *                      with simulataneous quiesce and server   *
  *                      up/down commands                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The Load Balancer quiesce, unquiesce, server up and server
  down command may experience timing overlap such that the
  server weight is incorrect.
  

Problem conclusion

• Added java synchronization around the functions to prevent
  overlappying operations.
  
  Fix included in :
     7.0.0.40
     8.0.0.11
     8.5.5.6
  

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 LOAD BALAN

• Fixed component ID

  5724H8811

Applicable component levels

• R700 PSY

     UP

• R800 PSY

     UP

• R850 PSY

     UP