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DB2 - Problem description

Problem IC70576 Status: Closed

DB2 CLP(DB2BP) CAN TRAP WITH SEGV OR CONSUME CPU WITH NESTED SEGV
CONDITIONS

product:
DB2 FOR LUW / DB2FORLUW / 910 - DB2
Problem description:
DB2 CLP(db2bp) process can trap with SEGV or consume CPU with 
nested SEGV conditions. 
 
Ensure DFT_MON_STMT = ON. 
 
1) db2pd -db <db> -appl to get the CoorPid. 
2) db2trc on -p <CoorPid-from-#1> -debug 
DB2.SQLR.sqlrr_stmt_exe_start.exit -suspend 
 
Session 1: 
3) db2 -f <the big SQL> 
 
Session 2: 
4) db2 get snapshot for applications on <db> 
[...] 
Dynamic SQL statement text: 
DB21017E  The Command Line Processor encountered a system error 
with the 
front-end process output queue. Reason code = -2029060033. 
 
 
Possible Stack: 
 
2878:    /db2/db2iwp/sqllib/bin/db2bp 
 
--------------------------------  lwpid : 1701541 
------------------------------- 
 
 0: c00000001827c0f0 : 
_Z13pdLogInternalmjmjmmmmPvmP11__va_list__() + 0x44e0 
(/db2/db2iwp/fp7_sb23796/lib64/libdb2.so) 
 1: c0000000184de6f0 : pdLogSysRC() + 0xd0 
(/db2/db2iwp/fp7_sb23796/lib64/libdb2.so) 
 2: c000000018f1df50 : _Z21sqloLogAndMapQueErrorjjim() + 0x70 
(/db2/db2iwp/fp7_sb23796/lib64/libdb2.so) 
 3: c0000000183aac30 : sqlocque() + 0x250 
(/db2/db2iwp/fp7_sb23796/lib64/libdb2.so) 
 4: 400000000011f350 : _Z15clp_bp_exitlistj() + 0xf0 
(/db2/db2iwp/sqllib/bin/db2bp) 
 5: 400000000011f870 : clp_bp_sigterm() + 0x170 
(/db2/db2iwp/sqllib/bin/db2bp) 
 5: e0000001208828e0 : [ sendsig : signal 11 : SIGSEGV ] 
 7: c000000018282b40 : sqlogmblkEx() + 0x15b0 
(/db2/db2iwp/fp7_sb23796/lib64/libdb2.so) 
 8: c00000001829b170 : 
_Z15sqlowqueWrapperP13SQLO_QUE_DESCP12SQLO_MSG_HDRib() + 0xe0 
(/db2/db2iwp/fp7_sb23796/lib64/libdb2.so) 
 9: c000000018266bf0 : sqlowque() + 0x30 
(/db2/db2iwp/fp7_sb23796/lib64/libdb2.so) 
10: 40000000000513a0 : _Z8clp_wqueP12SQLO_MSG_HDR() + 0xc0 
(/db2/db2iwp/sqllib/bin/db2bp) 
11: 40000000001201f0 : _Z16clp_send_msglinei() + 0x190 
(/db2/db2iwp/sqllib/bin/db2bp) 
12: 40000000000f8e90 : 
_Z17clp_stmt_snapshotP14sqlm_collectedP20sqlm_recording_groupPcj 
() 
+ 0x1bf0 (/db2/db2iwp/sqllib/bin/db2bp) 
13: 40000000000d87e0 : _Z18clpbp_exe_sqlmonssv() + 0x22c0 
(/db2/db2iwp/sqllib/bin/db2bp) 
14: 400000000004eb40 : _Z10clp_bp_conv() + 0x6a0 
(/db2/db2iwp/sqllib/bin/db2bp) 
15: 4000000000056d60 : 
_ZN6DasAPI13setOutputArgsER13DasOutputArgs() + 0x2a0 
(/db2/db2iwp/sqllib/bin/db2bp) 
16: c00000000002be30 : main_opd_entry() + 0x50 
(/usr/lib/hpux64/dld.so) 
 
WORKAROUND: 
None
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* All Linux/Unix Platforms                                     * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* DB2 CLP(db2bp) process can trap with SEGV or consume CPU     * 
* with nested SEGV conditions.                                 * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to v9.1FP10 or later                                 * 
****************************************************************
Local Fix:
available fix packs:
DB2 Version 9.1 Fix Pack 10  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 11  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12  for Linux, UNIX and Windows

Solution
Upgrade to v9.1FP10 or later
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC70577 IC70578 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
16.08.2010
20.06.2011
20.06.2011
Problem solved at the following versions (IBM BugInfos)
9.1.FP10
Problem solved according to the fixlist(s) of the following version(s)
9.1.0.10 FixList
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