When running a SELECT statement on a DPF, and there is a
shortage of memory, the engine traps as it attempts to free the
memory twice
Here's the stack when we got the problem:
0x00007FFFEDF7085E sqle_panic(int) + 0x021e
0x00007FFFEFD8BAD5 sqlofmblkEx + 0x07a5
0x00007FFFF047C829 sqlrkrpc_send_reply(sqlrr_cb*, SQLKD_CB*,
SQLR_RPCMESSAGE*, sqlca*, int, SQLR_BDSREPLY_STATE*) + 0x03f9
0x00007FFFF0471286 sqlrr_rpc_router(sqlrr_cb*) + 0x0326
0x00007FFFF046FC5E sqlrr_subagent_router(sqeAgent*,
SQLE_DB2RA_T*) + 0x104e
0x00007FFFEDF49546 address: 0x00007FFFEDF49546 ; dladdress:
0x00007FFFE8934000 ; offset in lib: 0x0000000005615546 ;
0x00007FFFEDF47DE0 sqleProcessSubRequest(sqeAgent*) + 0x03e0
0x00007FFFEDF7D057 sqeAgent::RunEDU() + 0x05d7
0x00007FFFF18B6F5E sqzEDUObj::EDUDriver() + 0x01be
0x00007FFFEFDD4A6A sqloEDUEntry + 0x057a
0x00007FFFF79C5EA5 address: 0x00007FFFF79C5EA5 ; dladdress:
0x00007FFFF79BE000 ; offset in lib: 0x0000000000007EA5 ;
0x00007FFFE73DC96D clone + 0x006d
Here's the messages in db2diag.log:
2021-01-12-02.41.22.451179-300 I25150E748 LEVEL: Warning
PID : 10439 TID : 140725048043264 PROC : db2sysc 2
INSTANCE: db2inst1 NODE : 002 DB : MYDB
APPHDL : 1-35532 APPID: 192.16.8.9.1.58761.210111115203
AUTHID : USER1 HOSTNAME: myhost
EDUID : 2682 EDUNAME: db2agntp (MYDB) 2
FUNCTION: DB2 UDB, SQO Memory Management,
SMemBasePool::requestToGrowPhysicalSize, probe:110
MESSAGE : Memory Allocation failed due to DB2_MEM_HEAP_MAX_PCT.
DATA #1 : reqChunks, PD_TYPE_REQ_CHUNKS, 4 bytes
4
DATA #2 : Pool type, PD_TYPE_POOL_TYPE, 4 bytes
1
DATA #3 : unsigned integer, 8 bytes
30
DATA #4 : unsigned integer, 8 bytes
4635903590
2021-01-12-02.41.32.041110-300 I25899E554 LEVEL: Severe
PID : 10439 TID : 140725048043264 PROC : db2sysc 2
INSTANCE: db2inst1 NODE : 002 DB : MYDB
APPHDL : 1-35532 APPID: 192.16.8.9.1.58761.210111115203
AUTHID : USER1 HOSTNAME: myhost
EDUID : 2682 EDUNAME: db2agntp (MYDB) 2
FUNCTION: DB2 UDB, relation data serv, sqlrr_signal_handler,
probe:100
MESSAGE : DIA0505I Execution of a component signal handling
function has begun.
2021-01-12-02.41.32.057911-300 I27146E618 LEVEL: Severe
PID : 10439 TID : 140725048043264 PROC : db2sysc 2
INSTANCE: db2inst1 NODE : 002 DB : MYDB
APPHDL : 1-35532 APPID: 192.16.8.9.1.58761.210111115203
AUTHID : USER1HOSTNAME: myhost
EDUID : 2682 EDUNAME: db2agntp (MYDB) 2
FUNCTION: DB2 UDB, relation data serv, sqlrr_dump_sibling,
probe:100
MESSAGE : * NOTE: NULL pentptr ... no pkgentry data
DATA #1 : Hexdump, 1 bytes
0x00007FFFF43F5DCC : 2A * |
