PM77540: Session creation within a data grid agent causes an exception and a client timeout when data grid security is enabled.

Download WebSphere DataPower XC10 Appliance V2.1.0.3 firmware

APAR status

• Closed as program error.

Error description

• A container exception occurs and might lead to a client
  timeout when security is enabled.
  
  The following exception might be displayed in the FFDC if this
  error occurs:
  ...
  Stack Dump =
  com.ibm.websphere.objectgrid.ObjectGridException: A
  failure happened when ObjectGrid.getSession() is called: the
  ObjectGrid-
  level security is enabled but there is no SubjectSource
  plug-in set on the ObjectGrid instance.
  at com.ibm.ws.objectgrid.ObjectGridImpl.setSessionSecurity
  (ObjectGridImpl.java:1329)
  at
  com.ibm.ws.objectgrid.ObjectGridImpl.popSession(ObjectGridImpl
  .java:4047)
  at com.ibm.ws.objectgrid.ServerCoreEventProcessor.
  getRemoteClientSession(ServerCoreEventProcessor.java:1871)
  at com.ibm.ws.objectgrid.ServerCoreEventProcessor.
  createInitialReadWriteTransaction(ServerCoreEventProcessor.java:
  609)
  at com.ibm.ws.objectgrid.ServerCoreEventProcessor.
  processMapCreationRequestMessage(ServerCoreEventProcessor.java:1
  780)
  ...
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All WebSphere eXtreme Scale users using a   *
  *                  DataGrid agent in the WebSphere eXtreme     *
  *                  Scale V8.5 or higher API, with security     *
  *                  enabled in their environment.               *
  ****************************************************************
  * PROBLEM DESCRIPTION: A container exception leading to        *
  *                      a client timeout might occur when       *
  *                      security is enabled.                    *
  ****************************************************************
  * RECOMMENDATION:  Install an interim fix that includes this   *
  *                  APAR.                                       *
  ****************************************************************
  When a DataGrid agent is created using the WebSphere eXtreme
  Scale API in an application, and it does an
  ObjectGrid.getSession() call within either the process(),
  processAllEntries(), or reduce() methods, and grid
  authorization checking is enabled by setting
  securityEnabled=true in the objectgrid.xml file, then calls
  from  the client to the agent fail with the FFDC error message
  that is mentioned in the Error Description of this APAR.
  This error might happen in one of the following scenarios:
  1) While accessing an ObjectGrid instance in a distributed way,
  the client does not provide any security credential, or the
  server does not authenticate the client credential.
  2)While accessing an ObjectGrid instance locally, the
  SubjectSource plug-in is not configured.
  This is because the session returned by the getSession() call
  in
  an agent context does not have an associated Subject for
  security checking.
  This problem does not apply to the WebSphere DataPower XC10
  Appliance.
  

Problem conclusion

• The code was corrected to use the appropriate session whenever
  the getSession() method is called on the agent.
  

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

  WS EXTREME SCAL

• Fixed component ID

  5724X6702

Applicable component levels

• R850 PSY

     UP

• R860 PSY

     UP