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DB2 - Problem description

Problem IC78715 Status: Closed

ZERO LENGTH DRDA DDM MONITORRD CRASHES DB2 INSTANCE.

product:
DB2 CONNECT / DB2CONNCT / 950 - DB2
Problem description:
The instance may trap because of empty DRDA DDM MONITORRD 
reply returned by the server. 
 
The stack may look like as below. The defect causes memory 
corruption can corrupt the stack. 
 sqlomcpy()                    ## Stack corrupted 
 sqljcReadBytes()              ## Stack corrupted 
 sqljrParseMonitorRd()         ## Stack corrupted 
 sqljrParseOpenSuccessReply()  ## Stack corrupted 
 sqljrParseOpenQueryReply() 
 sqljrParse() 
 sqljrDrdaArOpen() 
 sqljs_ddm_opnqry() 
 sqljsParseRdbAccessed() 
 sqljsParse() 
 sqljsSqlam() 
 sqljsDriveRequests() 
 sqljsDrdaAsInnerDriver() 
 sqljsDrdaAsDriver() 
 RunEDU() 
 
Trace buffer from zDB2 V10: 
 
6132    data DB2 UDB DRDA Communication Manager sqljcIntReceive 
fnc (3.3.54.4.0.1178) 
 
6132    data DB2 UDB DRDA Communication Manager sqljcIntReceive 
fnc (3.3.54.4.0.1178) 
  63C0  202000104C434E44 4444312020202020     ..LCNDDD1 
....<.+......... 
  63D0  2020202000000000 FF000AD003000200       ............ 
...........}.... 
  63E0  041C00 
 
 
Trace Snippet: 
 
6259        | | | | | | | | | | | sqljrParseMonitorRd entry 
[eduid 5399 eduname db2agent] 
6260        | | | | | | | | | | | | sqljcReadUint16Split entry 
[eduid 5399 eduname db2agent] 
6261        | | | | | | | | | | | | | sqljcReadDssContLen entry 
[eduid 5399 eduname db2agent] 
6262        | | | | | | | | | | | | | | pdLog entry [eduid 5399 
eduname db2agent] 
6263        | | | | | | | | | | | | | | | pdLogInternal entry 
[eduid 5399 eduname db2agent] 
6264        | | | | | | | | | | | | | | | | sqltGetDiagPath 
entry [eduid 5399 eduname db2agent] 
6265        | | | | | | | | | | | | | | | | sqltGetDiagPath data 
[probe 10] 
6266        | | | | | | | | | | | | | | | | sqltGetDiagPath exit 
6267        | | | | | | | | | | | | | | | | pdIsFODCInProgress 
entry [eduid 5399 eduname db2agent] 
6268        | | | | | | | | | | | | | | | | pdIsFODCInProgress 
exit 
6269        | | | | | | | | | | | | | | | | 
pdIsEduFODCInProgress entry [eduid 5399 eduname db2agent] 
6270        | | | | | | | | | | | | | | | | 
pdIsEduFODCInProgress exit 
6271        | | | | | | | | | | | | | | | pdLogInternal exit 
6272        | | | | | | | | | | | | | | pdLog exit 
6273        | | | | | | | | | | | | | sqljcReadDssContLen exit 
[rc = 0x87360009 = -2026504183 = SQLJC_ERROR_BEOF] 
6274        | | | | | | | | | | | | sqljcReadUint16Split exit 
[rc = 0x87360009 = -2026504183 = SQLJC_ERROR_BEOF] 
6275        | | | | | | | | | | | | sqljcReadUint16Split entry 
[eduid 5399 eduname db2agent] 
6276        | | | | | | | | | | | | sqljcReadUint16Split exit 
[rc = 0x87360009 = -2026504183 = SQLJC_ERROR_BEOF] 
6277        | | | | | | | | | | | | sqloEDUCodeTrapHandler entry 
[eduid 5399 eduname db2agent] 
 
--------- 
 
An application may also receive the error message: 
SQL0902C reason code = "9"  SQLSTATE=58005 
 
This error message would occur if the application is running on 
the DB2 Connect server directly and if the db2set registry 
parameter DB2CONNECT_IN_APP_PROCESS=NO is set.   This specific 
problem is related to this APAR and the issue is more prevalent 
if a query is issued against the server that returns multiple 
rows (possibly over 500 rows). 
 
Removing DB2CONNECT_IN_APP_PROCESS=NO (or setting it to YES) may 
workaround this particular instance of the issue.
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* All DB2 connect user using zDB2 V10.                         * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to v9.5.9 or higher version.                         * 
****************************************************************
Local Fix:
available fix packs:
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

Solution
V9.5.9 fixes the trap issue.
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC79562 IC81612 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
15.09.2011
28.03.2012
15.05.2014
Problem solved at the following versions (IBM BugInfos)
9.5.9
Problem solved according to the fixlist(s) of the following version(s)
9.5.0.9 FixList
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