PK39700: APPLICATION IN LOOP ISSUEING DL/I CMD CALLS WHICH ARE REJECTED WITH STATUS CD STATCD FILLS UP CIOP WITH DFS286 MESSAGES.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Customer application program issueing DL/I CMD calls which
  were rejected due to security violation ( status CD statCD
  CDSTAT ) loops. DFS286 messages fill up CIOP faster than
  they can be serviced. The DFSPOOL for CIOP in DFSCMD30 is
  conditional, so an obtain failure here does not bring down
  IMS, but eventually a spool line CLB dispatch needs a CIOP
  buffer and makes an unconditional request. The result is
  a U0732 abend. Customer feels an application should not
  be able to bring down IMS in this manner.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS V10 users of DL/I CMDS               *
  *                 rejected with the DFS286 message (security   *
  *                 authorization violation).                    *
  ****************************************************************
  * PROBLEM DESCRIPTION:  When excessive DFS286 security         *
  *                       violation messages are generated,      *
  *                       as a result of DL/I CMD calls, CIOP    *
  *                       buffers will be exhausted. This        *
  *                       leads to U0732 ABENDU0732 that         *
  *                       brings down IMS.                       *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  DFS286 messages are generated whenever an application issues
  DL/I command calls rejected because of security violation
  (Status code CD). If the application issues this repeatedly
  (as in a loop), the CIOP buffer will eventually be exhausted
  and this leads to an ABENDU732.
  
  MSGDFS286 STATUSCD U732
  

Problem conclusion

• AIDS: RIDS/DCS RIDS/CMD DCS CMD
    DEP: NONE
    GEN:
  
  *** END IMS KEYWORDS ***
  Code changes to module DFSCMD30 and DFSAOSC0 by introducing a
  field PSTSECVC, the security violation count with a threshold
  of PSTSECVM (x'FF' or 255). If this is exceeded, the DFS286
  message is suppressed, thereby eliminating the possibility of
  buffer shortage.
  In conjunction with the above Code changes, we enhanced macro
  IPST to accomodate the new PSTSECVC field description in IPCS
  control block formatting. Two modules are recompiled to
  pick up IPST macro: DFSAPST0 and DFSEF00F.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UK28415 UK28416

Modules/Macros

• DFSAOSC0 DFSAPST0 DFSCMD30 DFSEF00F IPST
  

Fix information

• Fixed component name

  IMS V10

• Fixed component ID

  5635A0100

Applicable component levels

• R010 PSY UK28415

     UP07/09/11 P F709 Ž

• R012 PSY UK28416

     UP07/09/11 P F709 Ž

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.