IC86512: PCOM: ONE OF MULTIPLE TN3270E CONSOLE SESSIONS OFTEN HANGS AFTER UPGRADING PCOMM TO 6.0.4

Personal Communications 6.0.6

APAR status

• Closed as program error.

Error description

• Customer is using mutiple sessions of Pcomm as zOS consoles
  on each PC.
  The sessions are connected to host OSA-ICC TN3270E gateway.
  After customer upgraded Pcomm from 5.6 to 6.0.4, one of
  the console sessions often hangs and stop receiving console
  messages. The session that hangs is not specific.
  If a session hangs, the other sessions are still working.
  The trace shows that the session received 2 byte garbaged
  data that is followed by TN3270E header. So the session
  cannot recognize the response flag in TN3270E header
  and does not send the response to TN3270E gateway.
  Customer verified that the same hang issue occurs on v6.0.4
  but on v6.0.2 or prior releases of Pcomm.
  And this occurs only when the multiple console screens are
  being updated rapidly.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of multiple TN3270 sessions        *
  ****************************************************************
  * PROBLEM DESCRIPTION: Intermittent TN3270 console session     *
  *                      hang and disconnect                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  After installing PCOM 6.0.4 Refresh Pack, users with multiple
  TN3270 console sessions will see intermittent session hangs
  and disconnects. This is caused by thread unsafe code handling
  outbound data streams from multiple hosts.
  

Problem conclusion

• PCSTLNET.DLL has been changed to correctly handle outbound data
  from multiple TN3270 hosts.
  
  Fix scheduled for PCOM 6.0.6 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:

  IP23452

Modules/Macros

• PCSTLNET
  

Fix information

• Fixed component name

  PCOMM V5 COMBO-

• Fixed component ID

  5639I7000

Applicable component levels

• R600 PSY

     UP

• R601 PSY

     UP