PK60555: SEVERAL SERVER RELATED ERRORS AS LISTED

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Server related issues found:
  1) Client will not wait more than 2 minutes on response from
     server.
  2) ABEND0C4 in server when client has timed out.
  3) Client hangs if no response is sent back to the client from
     the server. In this case we need to end the client.
     The symptom is the server continues to send requests to the
     control region.  CPU time builds and both go into a loop
     and the request is never sent back to the client.
  Keywords: ABENDS0C4 loops looping hang hanging
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of QCF3.1.                         *
  ****************************************************************
  * PROBLEM DESCRIPTION: 1. Client will not wait long enough on  *
  *                         requested function to end.           *
  *                      2. ABEND0C4 in server when client has   *
  *                         been timed out.                      *
  *                      3. Client hangs if no response is sent  *
  *                         back from IMS - only an error text.  *
  *                         In this case we need to check the    *
  *                         error text  and stop processing.     *
  *                         The symptom is the server continues  *
  *                         to send requests to the              *
  *                         control region.  CPU time builds and *
  *                         and the error   is never sent back   *
  *                         to the client.                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Programs have been changed to avoid 0C4, hang and time out.
  1. Client waits up to 3 minutes on the request to finish
   and response to be sent back. To avoid client hang for a very
   long time, client is timed out after 3 minutes.
   After client time out- the client has to be restarted in order
   to create a new communication connection to server ( the old
   remains occupied by the not answerred request and can not be
   used for other requests). Please, do not issue requests that
   will copy the whole message queue in client's files - issue
   fast query requests and browse requests with includes to
   restrict the response time and transfer volumes.
  2. Before sending response to client , a check is done in
   server - to verify the client is still active.
  3. If there is an error message response back from control
   region to server, the error response is send back to client
   and function is terminated with RC=16.
  

Problem conclusion

• The programs have been changed to fix the problems.
  

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:

  UK33999

Modules/Macros

•    IQCBTQCF IQCCTIME IQCC010  IQCLOD61 IQCP0000
  IQCQMRA9 IQCQMREA IQCQMREX IQCQMRE8 IQCXCTRL IQCZRSP0
  

Fix information

• Fixed component name

  IMS QUEUE CNTL

• Fixed component ID

  5697E9900

Applicable component levels

• R310 PSY UK33999

     UP08/02/26 P F802

Fix is available

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