PH09400: Update JVM server defaults for XMSO and Shared Library Region and improve configuration of java dump colle 19/06/18 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• This APAR implements the following:
  - Increase Java Native stack default Xmso to 1M
  - Set the default of the shared library region to be OFF
  - Help users configure automatic java dump collection
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS Users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Update defaults for the Xmso value and  *
  *                      the shared library region setting.      *
  *                      Also improve the information provided   *
  *                      for gathering JVM dumps.                *
  ****************************************************************
  - The 64-bit JVM uses a minimum of 1M of 64-bit native stack,
  because of this, setting Xmso too small can cause the JVM to
  fail prematurely when it uses the JNI.
  
  - Shared Library Region ON can result in large amounts of 31-bit
  storage being used.
  
  - Users have frequently been unable to capture Java Dumps on the
  first occurrence of a problem.
  

Problem conclusion

• UI61970
  
  This APAR changes the default -Xmso value from 128k to 1M in the
  supplied JVM Profiles.
  
  It also sets _BPXK_DISABLE_SHLIB=YES in the supplied JVM Profile
  templates and ensures that the default behaviour is to disable
  the Shared Library Region.
  
  Guidance in the supplied JVM Profile templates on how to set and
  control the locations of JVM dumps has been improved.
  
  UI63495 which resolves PH09400 also contains ACTION tracking
  which was missing from UI61970, explaining that DFJ@H317,
  ../lib/pipeline/commons-fileupload.jar, has been removed.
  

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:

  UI63495

Modules/Macros

• DFHJVMAX DFHJVMST DFHOSGI  DFHSJSC  DFHWLP   DFJ@H317 DFJ@H356
  DFJ@H467 DFJ@H468 EYUCMCIJ
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R200 PSY UI63495

     UP19/06/20 P F906 A

Fix is available

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