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DB2 - Problembeschreibung

Problem IC74633 Status: Geschlossen

A PANIC MAY OCCUR AFTER ISSUING DB2STOP FORCE ON HADR STANDBY WHILE
TAKEOVER HADR DB OPERATION IS IN PROGRESS

Produkt:
DB2 FOR LUW / DB2FORLUW / 950 - DB2
Problembeschreibung:
Running db2 takeover hadr on db on a standby machine followed by 
db2 stop force before the takeover command completes 
successfully can cause memory to be freed twice. This would lead 
to a panic in the system. This APAR can only occur on DB2 9.5 
FP7. 
 
2010-11-25-17.42.00.931548-300 I68908668E377       LEVEL: 
Warning 
PID     : 21039                TID  : 47382024677696PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000 
EDUID   : 310                  EDUNAME: db2hadrp (SAKE) 
FUNCTION: DB2 UDB, High Availability Disaster Recovery, 
hdrSDoTakeover, probe:47003 
MESSAGE : Info: Standby has completed takeover (now primary). 
 
2010-11-25-17.42.00.944158-300 I68909046E342       LEVEL: 
Warning 
PID     : 21039                TID  : 47382024677696PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000 
EDUID   : 310                  EDUNAME: db2hadrp (SAKE) 
FUNCTION: DB2 UDB, High Availability Disaster Recovery, hdrEduS, 
probe:20342 
MESSAGE : Info: Standby Finished. 
 
2010-11-25-17.42.00.945189-300 I68909389E553       LEVEL: 
Warning 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, base sys utilities, 
sqeAgentServices::RequestAgent, probe:12 
MESSAGE : Coordinator request rejected. 
DATA #1 : Hexdump, 4 bytes 
0x00002B17E2FE9400 : 0700 0000 
.... 
 
2010-11-25-17.42.00.948897-300 I68909943E461       LEVEL: Error 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, base sys utilities, 
sqeAgentServices::RequestAgent, probe:70 
MESSAGE : Agent not allocated, sqlcode = -6036 
 
2010-11-25-17.42.00.950313-300 E68910405E495       LEVEL: 
Warning 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, base sys utilities, 
sqeAgentServices::RequestAgent, probe:100 
MESSAGE : ADM7519W  DB2 could not allocate an agent.  The 
SQLCODE is "-6036". 
 
2010-11-25-17.42.00.954150-300 I68910901E456       LEVEL: Severe 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, base sys utilities, 
sqeIcoordCB::DispatchIndependentDBAgent, probe:110 
RETCODE : ZRC=0xFFFFE86C=-6036 
 
2010-11-25-17.42.00.955750-300 I68911358E544       LEVEL: Error 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, High Availability Disaster Recovery, 
hdrSpawnICoord, probe:30100 
MESSAGE : HADR ICoord Error: 
DATA #1 : Hexdump, 4 bytes 
0x00002B17E2FEA9B0 : 6D00 0580 
m... 
 
2010-11-25-17.42.00.957140-300 I68911903E533       LEVEL: Error 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, High Availability Disaster Recovery, 
hdrSpawnICoord, probe:30101 
MESSAGE : sqlcode: 
DATA #1 : Hexdump, 4 bytes 
0x00002B17E2FEA9F0 : 6CE8 FFFF 
l... 
 
2010-11-25-17.42.00.958549-300 I68912437E558       LEVEL: 
Warning 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, High Availability Disaster Recovery, 
hdrTakeoverHdrRouteIn, probe:55603 
 
RETCODE : ZRC=0x8005006D=-2147155859=SQLE_CA_BUILT 
          "SQLCA has been built and saved in component specific 
control block." 
 
2010-11-25-17.42.00.954201-300 I68912996E341       LEVEL: 
Warning 
PID     : 21039                TID  : 47382024677696PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000 
EDUID   : 310                  EDUNAME: db2hadrp (SAKE) 
FUNCTION: DB2 UDB, High Availability Disaster Recovery, hdrEduP, 
probe:20301 
MESSAGE : Info: Primary Started. 
 
2010-11-25-17.42.00.965391-300 I68913338E389       LEVEL: 
Warning 
PID     : 21039                TID  : 47382024677696PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000 
EDUID   : 310                  EDUNAME: db2hadrp (SAKE) 
FUNCTION: DB2 UDB, High Availability Disaster Recovery, 
hdrSetTcpWindowSize, probe:32201 
MESSAGE : Info: HADR Socket send buffer size, SO_SNDBUF: 16384 
bytes 
 
2010-11-25-17.42.00.966825-300 I68913728E392       LEVEL: 
Warning 
PID     : 21039                TID  : 47382024677696PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000 
EDUID   : 310                  EDUNAME: db2hadrp (SAKE) 
FUNCTION: DB2 UDB, High Availability Disaster Recovery, 
hdrSetTcpWindowSize, probe:32251 
MESSAGE : Info: HADR Socket receive buffer size, SO_RCVBUF: 
87380 bytes 
 
2010-11-25-17.42.00.965075-300 I68914121E1738      LEVEL: Severe 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, SQO Memory Management, 
sqloDiagnoseFreeBlockFailure, probe:10 
MESSAGE : Possible memory corruption detected. 
DATA #1 : ZRC, PD_TYPE_ZRC, 4 bytes 
0x820F0002 
DATA #2 : Corrupt block address, PD_TYPE_CORRUPT_BLK_PTR, 8 
bytes 
0x00002b1789615100 
DATA #3 : Block header, PD_TYPE_BLK_HEADER, 24 bytes 
0x00002B17896150E8 : 1596 78B1 0200 B0FA 0000 0000 0000 0000 
..x............. 
0x00002B17896150F8 : 0000 0000 0000 0000 
........ 
DATA #4 : Data header, PD_TYPE_BLK_DATA_HEAD, 48 bytes 
0x00002B1789615100 : 8000 0000 0000 0000 DDDD DDDD DDDD DDDD 
................ 
0x00002B1789615110 : DDDD DDDD DDDD DDDD DDDD DDDD DDDD DDDD 
................ 
CALLSTCK: 
  [0] 0x00002B1761A3CEEC pdLog + 0x18C 
  [1] 0x00002B1763F7042A /home/svtdbm/sqllib/lib64/libdb2e.so.1 
+ 0x382E42A 
  [2] 0x00002B1763F70F52 sqlofmblkEx + 0x130 
  [3] 0x00000000004147B6 _Z9sqlofmblkPv + 0x18 
  [4] 0x00002B1763EE040A sqlo_acs_fblk + 0x1C 
  [5] 0x00002B176259A889 
_Z26sqlexAgentCleanUserSecInfoP16SQLEX_AUTHINFO_TP5sqlca + 0xA3 
  [6] 0x00002B1762385917 
_ZN14sqeApplication12AppStopUsingEP8sqeAgenthP5sqlca + 0xF67 
  [7] 0x00002B1762532B3C _Z11sqlesrspWrpP14db2UCinterface + 
0x2D8 
  [8] 0x00002B176253306D sqleUCagentConnectReset + 0x17D 
  [9] 0x00002B17626B852C /home/svtdbm/sqllib/lib64/libdb2e.so.1 
+ 0x1F7652C 
 
2010-11-25-17.42.00.976550-300 I68915860E456       LEVEL: Severe 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, SQO Memory Management, 
sqloDiagnoseFreeBlockFailure, probe:30 
DATA #1 : String, 12 bytes 
Double free. 
 
2010-11-25-17.42.00.978148-300 E68916317E928       LEVEL: 
Critical 
PID     : 21039                TID  : 47381592664384PROC : 
db2sysc 
INSTANCE: svtdbm               NODE : 000          DB   : SAKE 
APPHDL  : 0-28727              APPID: *LOCAL.svtdbm.101126110514 
AUTHID  : SVTDBM 
EDUID   : 630                  EDUNAME: db2agent (SAKE) 
FUNCTION: DB2 UDB, base sys utilities, sqle_panic, 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/svtdbm/sqllib/db2dump/FODC_Panic_2010-11-25-17.42.00.9780 
28/". 
          Please look in this directory for detailed evidence 
about what 
          happened and contact IBM support if necessary to 
diagnose the 
          problem.
Problem-Zusammenfassung:
**************************************************************** 
* USERS AFFECTED:                                              * 
* HADR environments                                            * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* Running db2 takeover hadr on db on a standby machine         * 
* followed by                                                  * 
* db2 stop force before the takeover command completes         * 
*                                                              * 
* successfully can cause memory to be freed twice. This would  * 
* lead                                                         * 
* to a panic in the system. This APAR can only occur on DB2    * 
* 9.5                                                          * 
* FP7.                                                         * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 9.5 FP8 or higher                             * 
****************************************************************
Local-Fix:
Don't issue db2stop force on standby instance while HADR 
takeover database operation is being performed.
verfügbare FixPacks:
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

Lösung
The fix to avoid the double free of memory in this situation is 
included in DB2 9.5 FP8.
Workaround
keiner bekannt / siehe Local-Fix
Weitere Daten
Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
22.02.2011
27.06.2011
27.06.2011
Problem behoben ab folgender Versionen (IBM BugInfos)
9.5.FP8
Problem behoben lt. FixList in der Version
9.5.0.8 FixList