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DB2 - Problem description

Problem IC77733 Status: Closed

CRASH IN SQLJRCLIENTREROUTE WHEN FREEING NULL POINTER DURING LOW MEMORY
CONDITION

product:
DB2 FOR LUW / DB2FORLUW / 950 - DB2
Problem description:
During a low memory condition, an unsuccessful Client Reroute 
may cause a Signal 11 while trying to free a NULL pointer. The 
db2diag.log will contain a message like this: 
 
2011-06-26-06.38.45.220362-420 I191223582C1038    LEVEL: Severe 
PID     : 643214               TID  : 1           PROC : 
 
INSTANCE: db2inst1              NODE : 000         DB   : sample 
 
APPHDL  : 0-119                APPID: AABBCCDD.A17B.110531140101 
FUNCTION: DB2 UDB, SQO Memory Management, sqlofmblkEx, probe:22 
MESSAGE : Attempted to free NULL pointer. 
CALLSTCK: 
  [0] 0xD477F19C sqlofmblkEx + 0x8E0 
  [1] 0xD3ED7C80 
sqljrClientReroute__FP7UCintfcibPbP16sqljrChainedRqst + 0x3C4 
  [2] 0xD3ED702C 
sqljrPostErrorProcessing__FP13sqljrDrdaArCbP7UCintfci + 0x23C 
  [3] 0xD3E30F40 sqljrDrdaArRollback__FP7UCintfc + 0x85C 
  [4] 0xD44C2434 
sqljsRollbackBeforeConnectReset__FP11UCconHandle + 0xF0 
  [5] 0xD44C258C sqljsCleanup__FP13sqle_agent_cbP11UCconHandle + 
0xCC 
  [6] 0xD44C21A8 sqljsDrdaAsInnerDriver__FP17sqlcc_init_structb 
+ 0x110 
  [7] 0xD44C1EFC sqljsDrdaAsDriver__FP17sqlcc_init_struct + 0x88 
  [8] 0xD4599724 sqleRunAgent__FPcUl + 0x264 
  [9] 0xD43340FC sqloCreateEDU__FPFPcUl_vPcUlP13SQLO_EDU_INFOPl 
+ 0x1AC
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* AIX/Unix/Linux Client Reroute users                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* During a low memory condition, an unsuccessful Client        * 
* Reroute may cause a Signal 11 while trying to free a NULL    * 
* pointer. The db2diag.log will contain a message like this:   * 
*                                                              * 
* 2011-06-26-06.38.45.220362-420 I191223582C1038    LEVEL:     * 
* Severe                                                       * 
* PID    : 643214              TID  : 1          PROC :        * 
* INSTANCE: db2inst1              NODE : 000        DB  :      * 
* sample                                                       * 
* APPHDL  : 0-119                APPID:                        * 
* AABBCCDD.A17B.110531140101                                   * 
* FUNCTION: DB2 UDB, SQO Memory Management, sqlofmblkEx,       * 
* probe:22                                                     * 
* MESSAGE : Attempted to free NULL pointer.                    * 
* CALLSTCK:                                                    * 
*   [0] 0xD477F19C sqlofmblkEx + 0x8E0                         * 
*   [1] 0xD3ED7C80                                             * 
* sqljrClientReroute__FP7UCintfcibPbP16sqljrChainedRqst +      * 
* 0x3C4                                                        * 
*   [2] 0xD3ED702C                                             * 
* sqljrPostErrorProcessing__FP13sqljrDrdaArCbP7UCintfci +      * 
* 0x23C                                                        * 
*   [3] 0xD3E30F40 sqljrDrdaArRollback__FP7UCintfc + 0x85C     * 
*   [4] 0xD44C2434                                             * 
* sqljsRollbackBeforeConnectReset__FP11UCconHandle + 0xF0      * 
*   [5] 0xD44C258C                                             * 
* sqljsCleanup__FP13sqle_agent_cbP11UCconHandle + 0xCC         * 
*   [6] 0xD44C21A8                                             * 
* sqljsDrdaAsInnerDriver__FP17sqlcc_init_structb + 0x110       * 
*   [7] 0xD44C1EFC sqljsDrdaAsDriver__FP17sqlcc_init_struct +  * 
* 0x88                                                         * 
*   [8] 0xD4599724 sqleRunAgent__FPcUl + 0x264                 * 
*   [9] 0xD43340FC                                             * 
* sqloCreateEDU__FPFPcUl_vPcUlP13SQLO_EDU_INFOPl + 0x1AC       * 
*                                                              * 
* A successful Client Reroute in a low memory condition will   * 
* not experience this problem.                                 * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Apply DB2 v9.5 FP9                                           * 
****************************************************************
Local Fix:
available fix packs:
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

Solution
First fixed in DB2 v9.5 FP9
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
26.07.2011
22.03.2012
22.03.2012
Problem solved at the following versions (IBM BugInfos)
9.5.FP9
Problem solved according to the fixlist(s) of the following version(s)
9.5.0.9 FixList
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