PH33278: LANGUAGE ENVIRONMENT ABENDS0F8 WHEN RUNNING IN SRB MODE.

APAR status

• Closed as documentation error.

Error description

• An abends0F8 may be issued when code running in SRB mode
  makes a call to any Language Environment code where that code
  must issue an SVC call.  SVC calls are not permitted when
  executing Language Environment code in SRB mode outside of the
  Language Environment Preinitialization process.
  
  This restriction needs to be better documented. Projected
  closing code for this apar is DOC
  
  ANALYSIS:
       While running in SRB mode a malloc call was made to get
  some heap storage.  This required Language Environment to issue
  an SVC 1 wait call to get the Heap Latch because another thread
  already had the Heap Latch.
  
  KNOWN IMPACT:
  The application will fail.
  
  VERIFICATION STEPS:
  1. Running in SRB mode.
  2. Receive an abends0F8 in some Language Envioronment module.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All Language Environment conforming applications that run in *
  * service request block (SRB) mode and invoke a Language       *
  * Environment service.                                         *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When a Language Environment conforming routine which invokes *
  * Language Environment services running in SRB mode, 0F8 ABEND *
  * may be issued due to SVC call are not allowed on SRB and     *
  * Language Environment services may issue SVC call implicitly. *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Add a new section: Restrictions under SRB mode.
  
  z/OS Language Environment Programming Guide->Specialized
  programming tasks->Restrictions under SRB mode
  Restrictions exist when running a routine in SRB mode. For
  instance, SRB routines cannot issue any SVCs (except for ABEND).
  
  Language Environment routines which invoke SVCs implicitly can
  not be invoked successfully in SRB mode.
  Some of those service routines include:
  * Load a Module
  * Delete a Module
  * Get Storage
  * Free Storage
  * Handle Exception
  * Process Message
  

Problem conclusion

• The document has been updated to notify the customers.
  

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

Applicable component levels