OA52763: PROCESS HUNG FOLLOWING KILL ABENDEC6 RSNFF09 ABEND13E BPXLKKW

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A user was unable to kill a process, even with SUPERKILL.
  The address space also would not terminate via CANCEL.  A FORCE
  was required to terminate the address space.
  
  PROBLEM DETAILS:
     A task was in a timed wait as part of a poll syscall.
  BPXMIDIE posted this task (#Latch ECB) out of its wait, but the
  task was hit with a S13E due to a SEC6-FF09 (SIGKILL) while in
  IEAVEWAT.  BPXLKKW recovery (BPXL9KW) processing got a new KSER
  and issued a BPXXKTIM(CANCEL) to cancel the outstanding timer
  pop.  Since BPXXKTIM returned with Ktqe#Popped, we entered a
  wait on the #Latch ECB in the new KSER for BPXMIDIE to post us.
  However, since the old KSER was already posted by BPXMIDIE, this
  task remained waiting indefinitely.
  

Local fix

• FORCE hung job out of system.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of z/OS UNIX System Services for  HBB77B0.         *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * ?WAIT HANG in BPXLKKW waiting for a POST-in-flight for       *
  * a KSER ECB.                                                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A task was in a timed wait as part of a poll syscall.
  BPXMIDIE posted this task (#Latch ECB) out of its wait, but the
  
  task was hit with a S13E due to a SEC6-FF09 (SIGKILL) while in
  
  IEAVEWAT.  BPXLKKW recovery (BPXL9KW) processing got a new KSER
  
  and issued a BPXXKTIM(CANCEL) to cancel the outstanding timer
  
  pop.  Since BPXXKTIM returned with Ktqe#Popped, we entered a
  
  wait on the #Latch ECB in the new KSER for BPXMIDIE to post us.
  
  However, since the old KSER was already posted by BPXMIDIE, this
  
  task remained waiting indefinitely.
  

Problem conclusion

• The solution is to move the cancel timer code to before possibly
  orphaning the KSER.
  

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:

  UA92255

Modules/Macros

• BPXLKKW
  

Fix information

• Fixed component name

  OPENMVS SYS SRV

• Fixed component ID

  5695SCPX1

Applicable component levels

• R7B0 PSY UA92255

     UP17/07/07 P F707

Fix is available

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