PM41826: WOLA NEEDS TO PROVIDE SUPPORT FOR ROUTING TO MULTIPLE CLIENT REGRISTRATIONS

8.0.0.1: WebSphere Application Server V8.0 Fix Pack 1
8.0.0.2: WebSphere Application Server V8.0 Fix Pack 2
8.0.0.3: WebSphere Application Server V8.0 Fix Pack 3
8.0.0.4: WebSphere Application Server V8.0 Fix Pack 4
8.0.0.5: WebSphere Application Server V8.0 Fix Pack 5
8.0.0.6: WebSphere Application Server V8.0 Fix Pack 6
8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15

APAR status

• Closed as program error.

Error description

• The current external behavior for WOLA to allow multiple
  batch address spaces to register with the same name.
  However, the logic that selects which registration will get
  requests currently always locates the last, or most
  recent registration and looks there for the target service
  only.  If it does not find a match on the service
  name, it waits the amount of time specified for the wait for
  service timeout and if that expires, it times out
  the WAS application with a resource exception.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server V8.0                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION: Allow multiple batch address spaces to  *
  *                      receive WOLA requests using the same    *
  *                      registration name.                      *
  ****************************************************************
                                                                 *
  ****************************************************************
  An application in batch can drive a WebSphere Optimized Local
  Adapter (WOLA) register API call (BBOA1REG) with a given
  registration name.  The application can then drive the Host
  Service (BBOA1SRV) or  RECEIVE REQUEST (BBOA1RCA) API and pass
  the name of a service it is listening under.
  When done from multiple address spaces using the same
  registration name, only the last address space which performed
  the registration will be eligible to receive requests.
  

Problem conclusion

• Code has been modified to support an additional algorithm for
  routing requests where multiple address spaces have registered
  with the same registration name.  The new algorithm will
  provide a roughly even distribution across the set of address
  spaces registered with the same registration name.
  
  A new environment variable was added to control the algorithm
  for selecting a target Host Service when multiple address
  spaces are registered and Hosting the same service.  The new
  environment variable name is:
  
  ola_locate_service_search_algorithm
  
  Default: 1
  
  Applicable to: AppServer Control regions.
  
  Description:  When set to "1", the last address space to
  register will be the target to service locates.
  
  When set to "2", a roughly even distribution of requests will
  be spread across the set of address spaces with the same
  registration name and hosted services.
  
  
  APAR PM41826 is currently targeted for inclusion in
  Service Level (Fix Pack) 8.0.0.1 of WebSphere
  Application Server.
  
  Please refer to the Recommended Updates page for delivery
  information:
  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

  WEBSPHERE FOR Z

• Fixed component ID

  5655I3500

Applicable component levels

• R800 PSY

     UP