IT00551: SEGV POSSIBLE IN LOGCHFREE WHEN CLEANING UP SESSION IF CLOSING ASORT IN A LOGGED TEMP DBSPACE

APAR status

• Closed as program error.

Error description

• When a thread is terminating in rstcb_cleanup() it now calls
  strclose() which can call logchfree().  If the dbspace this sort
  is in is not flagged as a temporary dbspace (so not DBS_TEMP
  flag...0x2000 in onstat -d output) we segv in logchfree()
  because rstcb_cleanup() has already freed the rstcb->logbuff
  buffer that logchfree() attempts to use to write it's log record
  to the logical log.
  
  Stack trace for SEGV'ing thread would be as follows:
  
  logchfree
  chfree
  ptdrop
  stmp_drop
  srtdrprun
  srtclose
  rstcb_cleanup
  destroy_session
  sq_exit
  sqmain
  listen_verify
  spawn_thread
  startup
  
  Also to run into this, you would have to not have a temporary
  dbspace created with the -t option of onspaces.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL DB Users                                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Update to IDS-11.50.xC10                                     *
  ****************************************************************
  

Problem conclusion

• Problem Fixed In IDS-11.50.xC10
  

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:

Fix information

• Fixed component name

  INFORMIX SERVER

• Fixed component ID

  5725A3900

Applicable component levels

• RC10 PSY

     UP