PK77018: STORAGE LEAK USING JCICS HTTP CLASSES 10/06/18 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Repeated use of the JCICS WEB and TCPIP API commands leads to
  a storage leak.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Short on MVS storage when using the     *
  *                      JCICS API.                              *
  *                      DFHCZ0299 issued when attempting to     *
  *                      invoke a Java program from a            *
  *                      sequential terminal.                    *
  *                      DFHTR0112 Bad data passed for tracing   *
  *                      to DFHTRPT.                             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An HTTP request is received by CICS and a Java application is
  driven to process it.  The application makes a
  HttpRequest.getHost() call.  This is the first WEB API command
  to be issued so it causes an EXEC CICS WEB EXTRACT to be done
  by WebInfo.c, part of the CICS supplied JNI code.
  
  The EXTRACT routine within WebInfo.c allocates storage from the
  LE heap to hold the response from CICS.  This data gets passed
  back into the JVM.  The storage that was acquired should then
  be freed.  However, the pointer to the storage is set to NULL
  before the storage could be freed.  This leaves the storage
  orphaned on the LE heap.  Eventually the CICS region will run
  out of MVS storage.
  
  The same problem occurs for the other JCICS API commands that
  are related to HTTP and TCPIP information.
  
  In addition to the above, PTF UK47824 reshipped the version of
  DFJDTCOE from PTF UK35008.  This effectively removes the fixes
  to that module supplied by PTFs UK40332 (PK65342) and UK41154
  (PK71189).
  
  Keywords: SOS ABENDS0C4 S0C4 0C4 MSGDFHTR0112 TR0112 ABEND0C4
           MSGDFHCZ0299 CZ0299
  

Problem conclusion

• The CICS JNI code has been changed to ensure that storage areas
  acquired are correctly freed off when HTTP and TCPIP related
  JCICS API commands are being used.
  
  The fixes for PK65342 and PK71189 have been added back in to
  DFJDTCOE.
  

Temporary fix

• FIX AVAILABLE BY PTF ONLY
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UK55338

Modules/Macros

•    DFJDTCOE
  

Fix information

• Fixed component name

  CICSTS V3 Z/OS

• Fixed component ID

  5655M1500

Applicable component levels

• R50D PSY UK55338

     UP10/03/24 P F003

Fix is available

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