DB2 COMMON CLIE / DBCMNCLNT / A50 - DB2

The use of DB2_RESOURCE_POLICY in some configurations enables 
memory affinity for NUMA exploitation.  As part of this 
exploitation, various internal data structures are split into 
multiple regions and are allocated from different nodes. 
However, there are problems in how these multiple regions are 
initialized which results in memory corruption. 
Affected configurations must have more than 5 resources 
configured or automatically detected.  This information can be 
found in db2diag.log after running db2start.  (See "Number of 
resource bindings" entry.) 
 
2015-03-12-12.12.24.271249-240 E6184A2642           LEVEL: Event 
PID     : 56819936             TID : 258            PROC : 
db2wdog_DB2NAME 
INSTANCE: memmerto             NODE : 000 
HOSTNAME: p7302 
EDUID   : 258                  EDUNAME: db2wdog_DB2NAME 
FUNCTION: DB2 UDB, oper system services, 
sqloInitializeResourcePolicy, probe:20 
DATA #1 : String, 2279 bytes 
 
RESOURCE POLICY 
Number of DB resource policies      = 1 
 
        DATABASE RESOURCE POLICY 
        Database name                       = !GLBPOL! 
        Method                              = 1 
        Number of resource groups           = 1 
        Number of resource bindings         = 32 
        Round robin resource binding        = 1 
 
Two different behaviours may be seen as a result of this 
corruption: 
1) messages in db2diag.log regarding memory corruption during 
during database deactivation 
2015-03-06-11.25.39.902046-300 E541790A1016         LEVEL: 
Critical 
PID     : 6292082              TID : 2058           KTID : 
96010371 
PROC    : db2sysc 
INSTANCE: memmerto             NODE : 000           DB   : 
SAMPLE 
APPHDL  : 0-7                  APPID: 
*LOCAL.memmerto.150306162453 
AUTHID  : MEMMERTO             HOSTNAME: p7302 
EDUID   : 2058                 EDUNAME: db2agent (PMR56607) 
FUNCTION: DB2 UDB, SQO Memory Management, 
sqloDiagnoseFreeBlockFailure, probe:10 
MESSAGE : ADM14001C  An unexpected and critical error has 
occurred: "Panic". 
          The instance may have been shutdown as a result. 
"Automatic" FODC 
          (First Occurrence Data Capture) has been invoked and 
diagnostic 
          information has been recorded in directory 
 
"/home/memmerto/sqllib/db2dump/FODC_Panic_2015-03-06-11.25.39.89 
0878_ 
          0000/". Please look in this directory for detailed 
evidence about 
          what happened and contact IBM support if necessary to 
diagnose the 
          problem. 
 
-------Frame------ ------Function + Offset------ 
0x090000004D94261C sqle_panic__Fi + 0xA7C 
0x090000004D958010 sqloCrashOnCriticalMemoryValidationFailure + 
0x50 
0x090000004D97E298 
diagnoseMemoryCorruptionAndCrash__13SQLO_MEM_POOLFUlCPCcCb + 
0x3F8 
0x090000005823CB74 
markAllAllocatedBlocksInvalid__17SqloChunkSubgroupCFv + 0x134 
0x090000004D982A28 
markAllAllocatedBlocksInvalid__13SQLO_MEM_POOLCFv + 0x88 
0x090000004D96BBA0 sqloPurgeMemoryInSubPool + 0x400 
0x090000004D96C334 sqloFreeMemorySubPool + 0x134 
0x090000005004BBAC sqldTermDBCB__FP16sqeLocalDatabaseUl + 0x58C 
0x090000004E3078B8 CleanDB__16sqeLocalDatabaseFbP5sqlca + 0x838 
0x090000004E30FBD0 
ExecuteDBShutdown__16sqeLocalDatabaseFP8sqeAgentPbP5sqlcai + 
0x830 
0x090000004E322320 
TermDbConnect__16sqeLocalDatabaseFP8sqeAgentP5sqlcai + 0x3060 
0x090000004E3A77AC 
AppStopUsing__14sqeApplicationFP8sqeAgentUcP5sqlca + 0x1A2C 
0x09000000558BE774 
sqleStartDb__FsP8SQLE_BWAP10sqledbdescP13sqledbdescextT1PcT2iT1l 
Ul + 0x1414 
 
2) runtime traps due to corrupted latches 
2015-03-05-16.24.57.464727-300 E33801A3679          LEVEL: 
Severe (OS) 
PID     : 58917198             TID : 2402           PROC : 
db2sysc 
INSTANCE: memmerto             NODE : 000           DB   : 
SAMPLE 
APPHDL  : 0-8                  APPID: 
*LOCAL.memmerto.150305212457 
AUTHID  : MEMMERTO             HOSTNAME: p7302 
EDUID   : 2402                 EDUNAME: db2agent (SAMPLE) 
FUNCTION: DB2 UDB, SQO Latch Tracing, 
SQLO_SLATCH_CAS64::releaseConflict, probe:300 
MESSAGE : 
ZRC=0x870F00FB=-2029059845=SQLO_SLATCH_ERROR_HELDX_WITH_SHARED_H 
OLDERS 
          "shared latch found with both exclusive and shared 
holders.  Latch likely corrupt." 
CALLED  : OS, -, unspecified_system_function 
 
-------Frame------ ------Function + Offset------ 
0x090000000E6BB9D4 sqle_panic__Fi + 0x520 
0x090000000B3661B4 
dumpDiagInfoAndPanic__17SQLO_SLATCH_CAS64CFCPCcCUiCUlT3ClT3CiT1T 
3T7 + 0x308 
0x090000000B365E44 
releaseConflict__17SQLO_SLATCH_CAS64Fv@OL@21943 + 0x60 
0x090000000CF2C9CC releaseConflict__17SQLO_SLATCH_CAS64Fv + 0x44 
0x090000000CCF8DEC 
sqldScanOpen__FP8sqeAgentP14SQLD_SCANINFO1P14SQLD_SCANINFO2PPv 
+ 0x1C0 
0x090000000C6C8808 sqlrlini__FP8sqlrr_cbb + 0x380 
0x090000000DB36804 sqlrr_appl_init__FP8sqeAgentP5sqlca + 0x5474 
0x090000000DB05348 
InitEngineComponents__14sqeApplicationFcP8sqeAgentP8SQLE_BWAP5sq 
lcaP22SQLESRSU_STATUS_VECTORT1 + 0x2CC4 
0x090000000DAF9608 
AppStartUsing__14sqeApplicationFP8SQLE_BWAP8sqeAgentcT3P5sqlcaPc 
+ 0x820 
0x090000000D680DBC 
AppLocalStart__14sqeApplicationFP14db2UCinterface + 0x540

**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 10.5 and Fix Pack 7                   * 
****************************************************************

Discontinue the use of DB2_RESOURCE_POLICY if your 
configuration is at risk of being affected.

Problem was first fixed in DB2 Version 10.5 and Fix Pack 7

not known / see Local fix

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

13.03.2015
19.01.2016
28.04.2016