DB2 FOR LUW / DB2FORLUW / A50 - DB2

A query might return SQL0901N and produce a stack with the 
following: 
 
<StackTrace> 
-------Frame------ ------Function + Offset------ 
0x090000000055BF54 pthread_kill + 0xD4 
0x09000000102BD9F0 sqloDumpEDU + 0xD0 
0x090000000F75DD44 sqldDumpContext__FP9sqeBsuEduiN42PCcPvT2 + 
0x104 
0x0900000010FD3964 sqlrr_dump_ffdc__FP8sqlrr_cbiT2 + 0x52C 
0x0900000010FD138C sqlzeDumpFFDC__FP8sqeAgentUiP5sqlcai + 0x28 
0x0900000010FD1530 sqlzeSqlCode__FP8sqeAgentUiUlT2P5sqlcaiUsPc + 
0xCC 
0x0900000010FD427C sqlnn_erds__FiN41e + 0x134 
0x0900000014836560 
sqlnoSmpTransformGroupByOp__FP20SQLNO_SMP_POSTOPT_CBP21SQLNO_POS 
TOPT_CONTEXTPP19sqlno_plan_operator + 0x604 
0x0900000014835054 
sqlnoSmpTransformMGJNOp__FP20SQLNO_SMP_POSTOPT_CBP21SQLNO_POSTOP 
T_CONTEXTPP19sqlno_plan_operator + 0x354 
0x090000001482EFDC 
sqlnoSmpTransformSimpleOp__FP20SQLNO_SMP_POSTOPT_CBP21SQLNO_POST 
OPT_CONTEXTPP19sqlno_plan_operator + 0x304 
0x090000001482EFDC 
sqlnoSmpTransformSimpleOp__FP20SQLNO_SMP_POSTOPT_CBP21SQLNO_POST 
OPT_CONTEXTPP19sqlno_plan_operator + 0x304 
0x0900000014831118 
sqlnoSmpTransformSortOp__FP20SQLNO_SMP_POSTOPT_CBP21SQLNO_POSTOP 
T_CONTEXTPP19sqlno_plan_operator + 0x350 
0x0900000014832198 
sqlnoSmpTransformScanOp__FP20SQLNO_SMP_POSTOPT_CBP21SQLNO_POSTOP 
T_CONTEXTPP19sqlno_plan_operator + 0x3E0 
0x09000000148362A0 
sqlnoSmpTransformGroupByOp__FP20SQLNO_SMP_POSTOPT_CBP21SQLNO_POS 
TOPT_CONTEXTPP19sqlno_plan_operator + 0x344 
0x0900000012CBE9BC 
sqlnoSmpTransformSubsection__FP20SQLNO_SMP_POSTOPT_CBP19sqlno_pl 
an_operator + 0x4A4 
0x09000000147E5768 
sqlnoSmpTransformPass__FP20SQLNO_SMP_POSTOPT_CBP19sqlno_plan_ope 
rator + 0x3B8 
0x09000000147E5670 
sqlnoSmpTransformPass__FP20SQLNO_SMP_POSTOPT_CBP19sqlno_plan_ope 
rator + 0x2C0 
0x09000000147E5670 
sqlnoSmpTransformPass__FP20SQLNO_SMP_POSTOPT_CBP19sqlno_plan_ope 
rator + 0x2C0 
0x09000000147E5670 
sqlnoSmpTransformPass__FP20SQLNO_SMP_POSTOPT_CBP19sqlno_plan_ope 
rator + 0x2C0 
0x09000000147E5670 
sqlnoSmpTransformPass__FP20SQLNO_SMP_POSTOPT_CBP19sqlno_plan_ope 
rator + 0x2C0 
0x09000000147E5670 
sqlnoSmpTransformPass__FP20SQLNO_SMP_POSTOPT_CBP19sqlno_plan_ope 
rator + 0x2C0 
0x09000000147E5670 
sqlnoSmpTransformPass__FP20SQLNO_SMP_POSTOPT_CBP19sqlno_plan_ope 
rator + 0x2C0 
0x09000000147E5354 sqlnoSmpPostPassMain + 0x384 
0x09000000119DAD00 sqlno_final_phase__FP13sqlno_globals + 0x84C 
0x0900000011562F30 sqlno_exe__FP9sqlnq_qur + 0x844 
0x09000000113BB3D4 
sqlnn_cmpl__FP8sqeAgentP11sqlrrstrings17sqlnn_compileModeT3P14sq 
lrr_cmpl_enviT7PP9sqlnq_qur + 0xE8C 
0x09000000113BCCBC 
sqlnn_cmpl__FP8sqeAgentP11sqlrrstrings17sqlnn_compileModeT3P14sq 
lrr_cmpl_env + 0x50 
0x09000000111E614C 
sqlra_compile_var__FP8sqlrr_cbP14sqlra_cmpl_envPUciUsN54P14SQLP_ 
LOCK_INFOP16sqlra_cached_varPi + 0x768 
0x090000001142BC88 
sqlra_find_var__FP8sqlrr_cbP17sqlra_cached_stmt13sqlra_stmt_idUi 
T4PUcT4UsUcP14sqlra_cmpl_env15sqlra_fill_modePiiT12_N313_T12_P14 
SQLP_LOCK_INFOPP16sqlra_cached_varT12_b + 0x89C 
0x090000001109D36C sqlra_get_var__FP8sqlrr_cbiT2bPbT5 + 0x1A8 
0x0900000010C7040C sqlrr_execute_immediate__FP8sqlrr_cbi + 0x108 
0x0900000010C6FDF8 
sqlrr_execimmd__FP14db2UCinterfaceP16db2UCprepareInfo + 0x4E8 
0x0900000010C6DCC8 
sqljs_ddm_excsqlimm__FP14db2UCinterfaceP13sqljDDMObject + 0xE08 
0x0900000010C6AE0C 
sqljsParseRdbAccessed__FP13sqljsDrdaAsCbP13sqljDDMObjectP14db2UC 
interface + 0x38 
0x0900000011250204 
.sqljsParse.fdpr.clone.82__FP13sqljsDrdaAsCbP14db2UCinterfaceP8s 
qeAgentb + 0x1BD8 
0x0900000011258674 @73@sqljsSqlam__FP14db2UCinterfaceP8sqeAgentb 
+ 0x2E8 
0x0900000010DE0EE4 
@73@sqljsDriveRequests__FP8sqeAgentP14db2UCconHandle + 0xB4 
0x0900000010DE193C 
@73@sqljsDrdaAsInnerDriver__FP18SQLCC_INITSTRUCT_Tb + 0x558 
0x0900000010DE0BB0 sqljsDrdaAsDriver__FP18SQLCC_INITSTRUCT_T + 
0x21C 
0x0900000010FE0E64 RunEDU__8sqeAgentFv + 0x594 
0x0900000010FE0114 EDUDriver__9sqzEDUObjFv + 0x13C 
0x0900000010FDFF9C sqlzRunEDU__FPcUi + 0x10 
0x0900000010FF36BC sqloEDUEntry + 0x264 
</StackTrace> 
 
The db2diag.log will have entries like: 
 
FUNCTION: DB2 UDB, relation data serv, sqlrr_dump_ffdc, 
probe:300 
DATA #1 : SQLCA, PD_DB2_TYPE_SQLCA, 136 bytes 
 sqlcaid : SQLCA     sqlcabc: 136   sqlcode: -901   sqlerrml: 58 
 sqlerrmc: sqlnoSmpTransformGroupByOp[100]:rc(     0) 
 sqlerrp : SQLNO37E 
 
The problem only occurs when intra_parallel is enabled. It can 
be further identified by collecting an explain with the current 
degree special register set to 1.  The explain will have a 
MSJOIN with a pGRPBY operator as the first outer operator and 
the join predicate columns of the MSJOIN are also referenced by 
local equality predicates such as T1.A=T2.A and T1.A=1.

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

You can avoid the error by requesting the optimizer to use a 
degree of parallelism of 1.  This can be applied using the 
"current degree" special register or a DEGREE optimization 
guideline.

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       :

30.04.2015
20.01.2016
20.01.2016