When running a query involving one or more SORT operators, the
instance may trap with the following sequence of entries in
db2diag.log:
2018-12-14-19.54.19.930024+060 I20820212E4728 LEVEL:
Severe
PID : 59071 TID : 140251481761536 PROC :
db2sysc 0
INSTANCE: db2inst1 NODE : 000 DB :
TESTDB
APPHDL : 0-4365 APPID:
172.22.115.109.36790.181214185114
AUTHID : TESTUSER HOSTNAME: hostname
EDUID : 174 EDUNAME: db2agnts (TESTDB) 0
FUNCTION: DB2 UDB, buffer pool services,
sqlbUnchainBPDFromBucket, probe:374
DATA #1 : String, 159 bytes
NON-FATAL ASSERTION FAILED!!!ASSERTION EXPRESSION:
bGroupPtr->hbGroup.header.groupLatch.isHeldX()
SOURCE FILE NAME: sqlbfix_misc.C
SOURCE FILE LINE NUMBER: 374
DATA #2 : signed integer, 4 bytes
-1
DATA #3 : Buffer page descriptor, PD_TYPE_SQLB_BPD, 112 bytes
>
2018-12-14-19.54.19.967475+060 E20824941E3180 LEVEL:
Severe (OS)
PID : 59071 TID : 140251481761536 PROC :
db2sysc 0
INSTANCE: db2inst1 NODE : 000 DB :
TESTDB
APPHDL : 0-4365 APPID:
172.22.115.109.36790.181214185114
AUTHID : TESTUSER HOSTNAME: hostname
EDUID : 174 EDUNAME: db2agnts (TESTDB) 0
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
DATA #1 : String, 39 bytes
Attempting to unlock an invalid latch:
DATA #2 : File name, 16 bytes
sqloLatchCAS64.C
DATA #3 : Source file line number, 8 bytes
1055
DATA #4 : Codepath, 8 bytes
0
DATA #5 : String, 135 bytes
0x00007F8F49DD37A8: {
held X: 1
reserved for X: 0
shared holders: 14248
firstSharIndex: 0x18F49D
firstExclIndex: 0x3F
}
>
The stack will look like this:
-----FUNC-ADDR---- ------FUNCTION + OFFSET------
0x00007F90E390BF85
_Z25ossDumpStackTraceInternalmR11OSSTrapFileiP7siginfoPvmm +
0x0385
(/home/db2inst1/sqllib/lib64/libdb2osse.so.1)
0x00007F90E390BB8C ossDumpStackTraceV98 + 0x002c
(/home/db2inst1/sqllib/lib64/libdb2osse.so.1)
0x00007F90E3907C2D _ZN11OSSTrapFile6dumpExEmiP7siginfoPvm +
0x00fd
(/home/db2inst1/sqllib/lib64/libdb2osse.so.1)
0x00007F90E9FC6114 sqlo_trce + 0x0404
(/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x00007F90EA050299 sqloEDUCodeTrapHandler + 0x02b9
(/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x00007F90EFED1680 address: 0x00007F90EFED1680 ; dladdress:
0x00007F90EFEC2000 ; offset in lib: 0x000000000000F680 ;
(/lib64/libpthread.so.0)
0x00007F90E2B00207 gsignal + 0x0037
(/lib64/libc.so.6)
0x00007F90E2B018F8 abort + 0x0148
(/lib64/libc.so.6)
0x00007F90E7FB6C7D sqloExitEDU + 0x045d
(/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x00007F90E93D5906 _Z10sqle_panici + 0x0696
(/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x00007F90E9FC39EB
_ZNK17SQLO_SLATCH_CAS6420dumpDiagInfoAndPanicEPKcjmmlmiS1_mi +
0x02bb
(/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x00007F90EB034CA1 _ZN17SQLO_SLATCH_CAS6415releaseConflictEv +
0x03b1
(/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x00007F90EAF420B0 _Z13sqlbUnfixPageP11SQLB_FIX_CB + 0x09a0
(/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x00007F90E8583DF2
_Z13sqlsUnfixPageP10SQLS_SLDESP14SQLD_FILE_INFOm + 0x00b2
(/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x00007F90E8587D54 _Z8sqlsfshpP8sqeAgentP10SQLS_SLDES + 0x0f44
(/home/db2inst1/sqllib/lib64/libdb2e.so.1)
0x00007F90E8574113 _Z7sqlsendP8sqeAgentP10SQLS_SLDESi + 0x0053
(/home/db2inst1/sqllib/lib64/libdb2e.so.1) |
