JR40061: CMVC 211774 - ALLOW THE CLIENT TO CHOSE WHICH CUSTOM COMMANDS THEY DO NOT WANT SERIALIZE.

7.0.0-WS-WCServer-FP009

APAR status

• Closed as program error.

Error description

• By design, concurrent requests from the same registered shopper
  are synchronized, executed one at a time, to avoid possible
  deadlocks and optimistic locking exceptions when concurrent
  updates are made. However, not all commands perform updates and
  thus may not require this level of synchronization. This iFix
  allows  you to specify a list of ControllerCommand classes that
  can be safely executed concurrently by the same user.
  

Local fix

Problem summary

• USERS AFFECTED:
  All users
  
  PROBLEM ABSTRACT:
  Concurrent execution of controller commands by the same user is
  not possible.
  
  BUSINESS IMPACT:
  The overall impact of the problem depends on whether the clients
  business requirements expect requests to be executed
  concurrently for the same user.  If they do, then applying this
  iFix will allow the specified requests to be executed
  concurrently, to potentially achieve lower response times.
  
  RECOMMENDATION:
  

Problem conclusion

• This iFix delays or removes synchronization from HTTP requests
  unless and until a ControllerCommand is executed during the
  request.  If the first ControllerCommand executed appears in the
  configured list, or if no ControllerCommand is executed, then
  synchronization is not performed for the request.
  
  By default, there is no change in behaviour.  To get the new
  behaviour, specify the following tag in the InstanceProperties
  tag of the wc-server.xml file:
  
      <com.ibm.commerce.datatype.ActivityGUIDLock
       noLockControllerCommands="
     com.myCompany.myPackage1.MyControllerClassName1
     com.myCompany.myPackage2.MyControllerClassName2
    "
      />
  
  where the specified value for the noLockControllerCommands
  setting is a white-space delimited list of class names of
  ControllerCommand classes for which synchronization should not
  occur.  If it is missing or blank, there is no change in
  behaviour.  If it is specified, then synchronization locks are
  not obtained for
  a request until the first ControllerCommand is executed, and
  only when that command is not an instance of one of the
  specified ControllerCommand classes.
  -------------------------------------------------------------
  The latest available maintenance information can be obtained
  from the Recommended Fixes for WebSphere Commerce technote:
  http://www.ibm.com/support/docview.wss?rs=3046&uid=swg21261296
  

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

  WC BUS DEV ED W

• Fixed component ID

  5724I3900

Applicable component levels

• R700 PSY

     UP