IO20490: 4690-DD CONTROLLER SPONTANEOUSLY DUMPED.

APAR status

• Closed as program error.

Error description

• roblem description
  DD controller spontaneously dumped. We'd like to find out why
  because
  this caused Service request number 59215,7TD,000 to take effect
  when DD
  restarted its CSS sessions, taking down the front-end until we
  rebooted
  CC.
  

Local fix

Problem summary

•   The 16-bit stack of the failing process shows
  that the dump
  occurred when a waiting JattachRequest was
  found and the code
  tried to complete it without noticing that it
  was already
  cleared and its associated storage had been
  reused ... this
  caused e GP fault in
  JattachRequest_completion().
  

Problem conclusion

•      This error condition was introduced by
  the POS terminal sales
  app ending without being explicitly ended by
  SI.  The OS
  canceled the POS App's outstanding events
  but canceled a
  "pushed" one first.  This frees the request,
  but leaves a
  dangling pointer to that request.
  

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

•    JATTREQ  JATTSES  JATTUNIT
  

Fix information

• Fixed component name

  IBM 4690 OS V6

• Fixed component ID

  5639P7000

Applicable component levels

• R301 PSY

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