DB2 FOR LUW / DB2FORLUW / B10 - DB2

In a rare condition, Db2 may run into -901 error:
2020-03-30-20.53.04.691866+480 I70452A893           LEVEL:
Severe
PID     : 39583990             TID : 12338          PROC :
db2sysc 0
INSTANCE: db2inst1             NODE : 000           DB   :
SAMPLE
APPHDL  : 0-961                APPID:
36.12.16.13.62772.200330111638
AUTHID  : DB2INST1             HOSTNAME: myhost1
EDUID   : 12338                EDUNAME: db2agent (CBUSDB) 0
FUNCTION: DB2 UDB, relation data serv, sqlrr_dump_ffdc,
probe:250
DATA #1 : SQLCA, PD_DB2_TYPE_SQLCA, 136 bytes
sqlcaid : SQLCA     sqlcabc: 136   sqlcode: -901   sqlerrml: 30
sqlerrmc: Illegal section number : 2560!
sqlerrp : SQLRA065
sqlerrd : (1) 0x00000000      (2) 0x00000000      (3) 0x00000000
           (4) 0x00000000      (5) 0xFFFFFF38      (6)
0x00000000
sqlwarn : (1)      (2)      (3)      (4)        (5)       (6)
           (7)      (8)      (9)      (10)        (11)
sqlstate:

While dumping the diagnostic data, the engine may trap. The trap
stack:
0x090000002E334A28
sqlrr_dump_sibling__FP8sqlrr_cbP25sqlra_sql_context_siblingiT3 +
0x218
0x090000002CBCB998 sqlrr_dump_ffdc__FP8sqlrr_cbiT2 + 0x83C
0x090000002CBCAFE4 sqlzeDumpFFDC__FP8sqeAgentUiP5sqlcai + 0x28
0x090000002C9460AC sqlzeSqlCode__FP8sqeAgentUiUlT2P5sqlcaiUsPc +
0x234
0x090000002C94583C sqlrrSqlCode + 0xA4
0x090000002D875B94
sqlra_find_sect__FP8sqlrr_cbP20sqlra_cached_packageUsiPP20sqlra_
cached_section@OL@22320 + 0x90
0x090000002C493A80
sqlra_get_section__FP8sqlrr_cbPUcsT2T3T2UsUlP16db2UCprepareInfoP
15db2UCCursorInfoiUi + 0x410
0x090000002C4A288C
sqlra_get_section__FP8sqlrr_cbPUcsT2T3T2UsUlP16db2UCprepareInfoP
15db2UCCursorInfoiUi + 0x274
0x090000002C4AD9A8
sqlrr_sql_request_pre__FP14db2UCinterfaceUiiP16db2UCprepareInfoP
15db2UCCursorInfo + 0x308
0x090000002C3B4A00
sqlrr_open__FP14db2UCinterfaceP15db2UCCursorInfo + 0x2F0
0x090000002CA543B8
sqljsParseRdbAccessed__FP13sqljsDrdaAsCbP13sqljDDMObjectP14db2UC
interface + 0xD04
0x090000002CA4B8E0 @72@sqljsSqlam__FP14db2UCinterfaceP8sqeAgentb
+ 0x11E4
0x090000002CA4B8E0 @72@sqljsSqlam__FP14db2UCinterfaceP8sqeAgentb
+ 0x11E4
0x090000002CA4B4D4 @72@sqljsSqlam__FP14db2UCinterfaceP8sqeAgentb
+ 0xDD8
0x090000002D7B94E4
@72@sqljsDriveRequests__FP8sqeAgentP14db2UCconHandle + 0xA8
0x090000002D7B9FF8
@72@sqljsDrdaAsInnerDriver__FP18SQLCC_INITSTRUCT_Tb + 0x5FC
0x090000002D20995C RunEDU__8sqeAgentFv + 0x40E1C
0x090000002D17E738 RunEDU__8sqeAgentFv + 0x124
0x090000002BF93AE4 EDUDriver__9sqzEDUObjFv + 0x130
0x090000002BC252D4 sqloEDUEntry + 0x3A0

The fix for this APAR corrects the dumping logic so it won't
crash the server, instead of fixing the -901 error since the
reason for -901 is still unknown.

****************************************************************
* USERS AFFECTED:                                              *
* N/A                                                          *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Db2 for LUW V11.1 Mod4 Fixpack6 or later.         *
****************************************************************

not known / see Local fix

forerunner  : IT32844 
follow-up : 

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

01.06.2020
21.03.2021
21.03.2021