PM59131: Loop in ICON getting CEE3204S ABEND0C4 Protection Exception

APAR status

• Closed as program error.

Error description

• Loop in ICON getting CEE3204S ABEND0C4 Protection Exception
  
  This happens if LsToXml converter gets an incomplete IMS
  response message. ICON ends in an endless loop reporting
  iteratively a 0C4.
  
  The top-down API is running into a problem because the
  @irz_async_msg_header block records the length (L) of the
  response structure provided by the MPP when it called IRZQSETS.
  
  If a complete message is not generated due to an error, the IMS
  connect buffers will not contain the complete structure, however
  the API will still attempt to read (L) bytes, causing the SOC4.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of the RDz IMS PL/I top-down support   *
  ****************************************************************
  * PROBLEM DESCRIPTION: The IRZPWSIO IRZXGETS API causes a SOC4 *
  *                      by attempting to read beyond the end of *
  *                      the ICON message input buffer when an   *
  *                      IMS PL/I top-down MPP sends a partial   *
  *                      response message.                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The @irz_async_msg_header message header records the length of
  the response data supplied by the MPP when it called IRZQSETS,
  not how much of the response data was successfully inserted into
  the IMS Message Queue.
  

Problem conclusion

• When a partial message is received from IMS, IRZXGETS will now
  return code @irz_icon_buf_exhausted (997) to the XML converter
  which will report the condition using message IRZ0501S. The
  following is an example of the message that would be emitted
  when a partial message is received from IMS:
  
  IRZ0501S Language structure to XML coversion could not complete
  in procedure WSPOC10D because a return code of 997 was received
  from the IRZXGETS API when attempting to retrieve language
  structure getteam_1_0Response from the IMS Connect message
  input buffer.
  

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

• IRZPWSH  IRZPWSIO
  

Fix information

• Fixed component name

  RD/Z HOST

• Fixed component ID

  5724T0723

Applicable component levels

• R801 PSY UK77465

     UP12/04/03 I 1000

Fix is available

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