PH63819: VECTOR REGISTER CORRUPTION WHEN LINKING TO JAVA PROGRAM SWITCHING BETWEEN L8 AND T8 TCB FROM THE LIBERTY THREAD POOL.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Vector registers are not correctly saved/restored as the task is
  switched to/from the L8 and a T8 from the Liberty thread pool
  during a LINK to Java program.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Vector registers 16-23 contain          *
  *                      different values after an EXEC CICS     *
  *                      LINK to a Liberty program.              *
  ****************************************************************
  A non-Java program is running on an open TCB.  This program
  issues an EXEC CICS LINK to an @CICSProgram in a Liberty JVM
  server which has been configured with the cicsts:link-1.0
  feature.
  
  Upon return from the EXEC CICS LINK vector registers 16 through
  23 contain different values which is inconsistent with the z/OS
  linkage conventions.  If the calling program is relying on a
  value put into one of these registers prior to the LINK then
  unexpected behaviour will occur.  In the reporting customer's
  case this led to a S0C7.
  

Problem conclusion

• CICS has been updated so that vector registers 16 to 23 are
  saved/restored when an EXEC CICS LINK is issued from an open TCB
  to an @CICSProgram in a Liberty JVM server.
  

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:

  PH66573 UO04005

Modules/Macros

• DFHDSSR
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R300 PSY UO04005

     UP25/07/12 P F507

Fix is available

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