DB2 FOR LUW / DB2FORLUW / A50 - DB2

There is possibility of a trap when trying to unlock a latch 
that has been already unlocked. 
The top function in the stack should show at least 
'sqlrlc_auth_find_insert()' and 'sqle_panic()'. 
 
Here is a stack example: 
 
  0x090000000055BED4 pthread_kill + 0xD4 
  0x090000000055B764 _p_raise + 0x44 
  0x09000000000399E8 raise + 0x48 
  0x0900000000054F64 abort + 0xC4 
  0x090000000B21E950 sqloExitEDU + 0x320 
  0x09000000083DA30C sqle_panic + 0x4DC 
  0x090000000AAE6414 sqloSpinLockReleaseConflict + 0x2AC 
  0x090000000A9A46CC sqloSpinLockReleaseConflict + 0x154 
  0x09000000098502D8 sqlrlc_auth_find_insert + 0x17A8 
  0x090000000DE0F810 sqlrlc_sysuserauth_get_authPDs + 0x134 
  0x090000000DE7F69C sqlrlgua + 0x6C4 
 
From db2diag.log, you should find error message(s) as below: 
 
2014-10-14-11.20.04.373998+480 I414087385A1895      LEVEL: 
Severe 
PID     : 4980906              TID : 20820          PROC : 
db2sysc 0 
INSTANCE: db2inst1             NODE : 000           DB   : 
SAMPLE 
APPHDL  : 0-13124              APPID: 
10.31.84.61.50654.141014030223 
AUTHID  : db2inst1             HOSTNAME: HOSTNAME1 
EDUID   : 20820                EDUNAME: db2agent (SAMPLE) 0 
FUNCTION: DB2 UDB, SQO Latch Tracing, 
sqlo_xlatch::releaseConflict, probe:10 
DATA #1 : String, 27 bytes 
unlocking an unlatched lock 
DATA #2 : Pointer, 8 bytes 
0x0a000200b1ecfcd0 
DATA #3 : String, 109 bytes 
{ 
   lock          = { 0x00000000 [ unlocked ] } 
   identity      = sqlrlc_entry_common::usage_latch (575) 
} 
DATA #4 : Hexdump, 8 bytes 
0x0A000200B1ECFCD0 : 0000 0000 023F 0000 
.....?.. 
CALLSTCK: (Static functions may not be resolved correctly, as 
they are resolved to the nearest symbol) 
  [0] 0x090000000AAE640C sqloSpinLockReleaseConflict + 0x2A4 
  [1] 0x090000000A9A46CC sqloSpinLockReleaseConflict + 0x154 
  [2] 0x09000000098502D8 sqlrlc_auth_find_insert.. 
  [3] 0x090000000DE0F810 sqlrlc_sysuserauth_get_authPD.. 
  [4] 0x090000000DE7F69C sqlrlgua__FP8... 
  [5] 0x090000000DE0F138 sqlrlgua__FP8... 
  [6] 0x090000000C3D1B64 sqlra_check_each_privs__FP8... 
  [7] 0x090000000CC54CE4 sqlra_check_privs__FP8... 
  [8] 0x090000000B1DA7A4 sqlra_check_stmt_privs__FP8...

**************************************************************** 
* USERS AFFECTED:                                              * 
* N/A                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2  V10.5 FIXPACK 7.                             * 
****************************************************************

The problem is firstly fixed on V10.5 FIXPACK 7.

not known / see Local fix

Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

21.10.2014
20.01.2016
20.01.2016