PI64856: POTENTIAL UNPREDICATABLE RESULTS WITH SOCKAPI CTRACE OPTION

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• .
  When there is an application active on the system that is using
  the EZASMI sockets interface (includes EZASOKET calls, CICS
  Sockets API (not TCPSERVICE listeners), and IMS Socket API), if
  the SYSTCPIP CTRACE option SOCKAPI is enabled the potential
  exists for unrelated key 6 storage areas to be altered.
  Results if this occurs are unpredictable.
  
  
  Other symptoms:
  
  SYSTRACE and SYSOMVS CTRACE will show program interrupts
  occurring during socket processing but no errors reflected back
  to the application (or logged in the SYSTCPIP CTRACE).
  
  Some asynchronous calls do not log call completions in the
  SOCKAPI trace.
  

Local fix

• .
  Do not enable the SOCKAPI option.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of the Communications Server for                   *
  * z/OS Version 2 Releases 2  IP : SOCKAPI                      *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When the CTRACE SOCKAPI trace option is turned on,           *
  * unpredictable results can occur during  application          *
  * processing. Storage areas belonging to KEY 6 are overwritten *
  * causing erroneous outputs.                                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  During read/and write  asynchronous socket calls,  sockapi trace
  entries are cut if the sockapi option is on. To collect
  information for the trace, an IOCTL socket call  is invoked but
  the call is made in 64-bit addressing mode. The IOCTL socket
  call cannot be issued in 64-bit mode  during asynchronous
  processing.
  

Problem conclusion

• Code has been added to issue the IOCTL socket call in 31-bit
  addressing mode.
  

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:

  UI40092

Modules/Macros

• EZBSOMT1
  

Fix information

• Fixed component name

  TCP/IP V3 MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R220 PSY UI40092

     UP16/09/17 P F609

Fix is available

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