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DB2 - Problem description

Problem IT18654 Status: Closed

-901 SQLERRMC: PROBE 020 IN SQLKTOPN(), MSG=TQ ALREADY OPEN

product:
DB2 FOR LUW / DB2FORLUW / A10 - DB2
Problem description:
On DB2 DPF a Stored procedure execution can fail with the 
following on a remote node for a fetch request 
 
db2diag.log will have entries of this nature: 
 
 
FUNCTION: DB2 UDB, table Q services, sqlktopn, probe:20 
MESSAGE : DIA0001E An internal error occurred. Report the 
following error code 
          : "Line=00536, rc1=0x82170001, rc2=0x00000004, 
rc3=0x7fff4cd127a0, 
          msg=TQ already open". 
 
 
EDUID   : 317146               EDUNAME: db2agntp (FTDW) 61 
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: 44 
sqlerrmc: probe 020 in sqlktopn(), msg=TQ already open 
sqlerrp : SQLRI50E 
sqlerrd : (1) 0x82170001      (2) 0x00000001      (3) 0x00000000 
           (4) 0x00000000      (5) 0xFFFFEA92      (6) 
0x0000003D 
sqlwarn : (1)      (2)      (3)      (4)        (5)       (6) 
           (7)      (8)      (9)      (10)        (11) 
sqlstate: 
 
 
Stacks will include: 
 
sqlriReceiveDss 
sqlrr_dss_router 
sqlrr_subagent_router 
sqleSubRequestRoute 
sqleProcessSubRequest 
 
example: 
 
-----FUNC-ADDR---- ------FUNCTION + OFFSET------ 
0x00007FFFF1D6157F ossDumpStackTraceEx + 0x01ef 
 
(/var/ibmdb2/nypxt680/sqllib/lib64/libdb2osse.so.1) 
0x00007FFFF1D5C33E _ZN11OSSTrapFile6dumpExEmiP7siginfoPvm + 
0x00cc 
 
(/var/ibmdb2/nypxt680/sqllib/lib64/libdb2osse.so.1) 
0x00007FFFF4AFBB63 sqlo_trce + 0x03fb 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF4B44912 sqloDumpDiagInfoHandler + 0x00e0 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF79CD7E0 address: 0x00007FFFF79CD7E0 ; dladdress: 
0x00007FFFF79BE000 ; 
 offset in lib: 0x000000000000F7E0 ; 
                (/lib64/libpthread.so.0) 
0x00007FFFF79CA97C pthread_kill + 0x002c 
                (/lib64/libpthread.so.0) 
0x00007FFFF4B43D11 sqloDumpEDU + 0x0045 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF3D75FEB _Z15sqldDumpContextP9sqeBsuEduiiiiiPKcPvi + 
0x068f 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF3593B02 _Z15sqlrr_dump_ffdcP8sqlrr_cbii + 0x0572 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF37B7B50 _Z13sqlzeDumpFFDCP8sqeAgentjP5sqlcai + 0x0020 
 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF37B7237 
_Z11sqlzeMapZrcP8sqeAgentjmjP5sqlcaiPK12sqlzeContextb + 0x046 
3 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF35C0018 _Z11sqlrrMapZrcP8sqlrr_cbjmi + 0x0038 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF4EE37A6 
_Z15sqlriReceiveDssP8sqlrr_cbP16sqlkdRqstRplyFmtPl + 0x0530 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF4D20627 _Z16sqlrr_dss_routerP8sqlrr_cb + 0x027f 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF4D22A9D 
_Z21sqlrr_subagent_routerP8sqeAgentP12SQLE_DB2RA_T + 0x0e53 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF3EB5B59 _Z20sqleSubRequestRouterP8sqeAgentPjS1_ + 
0x0679 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF3EB65C8 _Z21sqleProcessSubRequestP8sqeAgent + 0x00a6 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF30B2ECB _ZN8sqeAgent6RunEDUEv + 0x0641 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF37B7F00 _ZN9sqzEDUObj9EDUDriverEv + 0x00a6 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF37B7E57 _Z10sqlzRunEDUPcj + 0x0009 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF35164DC sqloEDUEntry + 0x02f4 
                (/var/ibmdb2/nypxt680/sqllib/lib64/libdb2e.so.1) 
0x00007FFFF79C5AA1 address: 0x00007FFFF79C5AA1 ; dladdress: 
0x00007FFFF79BE000 ; 
 offset in lib: 0x0000000000007AA1 ; 
                (/lib64/libpthread.so.0) 
0x00007FFFF1113AAD clone + 0x006d 
                (/lib64/libc.so.6) 
 
 
or traps with 
 
 
Stack: 
====================== 
 
0x00007FFFF1DD4CFB ossDumpStackTraceEx + 0x01ef 
  0x00007FFFF1DCFABA _ZN11OSSTrapFile6dumpExEmiP7siginfoPvm + 
0x00cc 
  0x00007FFFF4B29B2F sqlo_trce + 0x03fb 
  0x00007FFFF4B72925 sqloEDUCodeTrapHandler + 0x0265 
  0x00007FFFF79CE7E0 address: 0x00007FFFF79CE7E0 ; dladdress: 
0x00007FFFF79BF000 ; offset in lib: 0x000000000000F7E0 ; 
  0x00007FFFF40923AE _Z8sqlktopnP8sqeAgentP9sqlri_taoP9SQLE_KRCB 
+ 0x047e 
  0x00007FFFF59174ED _Z8sqlriopnP8sqlrr_cbP9sqlri_taoPi + 0x0b01 
  0x00007FFFF4F0CF3B 
_Z15sqlriReceiveDssP8sqlrr_cbP16sqlkdRqstRplyFmtPl + 0x063d 
  0x00007FFFF4D4BCAF _Z16sqlrr_dss_routerP8sqlrr_cb + 0x027f 
  0x00007FFFF4D4E21A 
_Z21sqlrr_subagent_routerP8sqeAgentP12SQLE_DB2RA_T + 0x0f48 
  0x00007FFFF3EF77B9 _Z20sqleSubRequestRouterP8sqeAgentPjS1_ + 
0x0679 
  0x00007FFFF3EF8228 _Z21sqleProcessSubRequestP8sqeAgent + 
0x00a6 
  0x00007FFFF3119DE7 _ZN8sqeAgent6RunEDUEv + 0x0649 
  0x00007FFFF380ADB8 _ZN9sqzEDUObj9EDUDriverEv + 0x00a6 
  0x00007FFFF380AD0F _Z10sqlzRunEDUPcj + 0x0009 
  0x00007FFFF35723C4 sqloEDUEntry + 0x02f4 
  0x00007FFFF79C6AA1 address: 0x00007FFFF79C6AA1 ; dladdress: 
0x00007FFFF79BF000 ; offset in lib: 0x0000000000007AA1 ; 
  0x00007FFFF118793D clone + 0x006d
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 10.1 Fix Pack 6                               * 
****************************************************************
Local Fix:
db2set APM_THROTTLE=25
Solution
First fixed in DB2 10.1 Fix Pack 6
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
04.01.2017
02.03.2017
02.03.2017
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)