IC76041: PCOM: INTERMITTENT TWO SECOND DELAY BETWEEN EHLLAPI FUNCTION CALLS

Personal Communications 5.9.8

APAR status

• Closed as program error.

Error description

• EHLLAPI application users experience intermittent delays or slow
  down in performance. Traces show a 2 second round trip time for
  each EHLLAPI function call for two minutes or more. Then the
  delay goes away and the EHLLAPI function calls return to normal
  sub-second round trip time.
  
  This happens on PCOM 5.9.0 and 5.9.7.1 levels.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All EHLLAPI application users                *
  ****************************************************************
  * PROBLEM DESCRIPTION: Intermittent 2 second delay using       *
  *                      EHLLAPI application.                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Multi threaded EHLLAPI applications experience intermittent
  hang and a consistent 2 second delay in EHLLAPI calls.
  

Problem conclusion

• When a user application makes a EHLLAPI call, PCOMM creates a
  memory block. This is done once for an instance of the user
  application (one per process). If the first EHLLAPI call is
  made through multiple threads, PCOMM needs synchronization to
  allow only the first thread to create this memory block. The
  release of the lock for this synchronization was not done
  cleanly. PCSHLL32.DLL has been changed to resolve this.
  
  Fix scheduled for PCOM 5.9.8 refresh pack
  Fix scheduled for PCOM 6.0.3 refresh pack
  

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:

Modules/Macros

• PCSHLL32
  

Fix information

• Fixed component name

  PCOMM V5 COMBO-

• Fixed component ID

  5639I7000

Applicable component levels

• R590 PSY IP23349

     UP12/05/09 I 1000

• R601 PSY

     UP