Latest versionsfixlist
11.1.0.7 FixList
10.5.0.9 FixList
10.1.0.6 FixList
9.8.0.5 FixList
9.7.0.11 FixList
9.5.0.10 FixList
9.1.0.12 FixList
Have problems? - contact us.
Register for free anmeldung-x26
Contact form kontakt-x26

DB2 - Problem description

Problem IC76846 Status: Closed

DB2HMON AGENT AND DB2THROT DEADLOCK BETWEEN LATCH AND SEMAPHORE,LEADING TO
DB2HMON HOLDING THE OLDEST TRANSACTION

product:
DB2 FOR LUW / DB2FORLUW / 910 - DB2
Problem description:
When DB2HMON agent has deadlocked with db2throt process, the 
database very likely will run out of logfiles at some point in 
time, by DB2HMON holding the oldest transaction. Reaching 
NUM_LOG_SPAN nor FORCE APPLICATION will get the agent out of the 
hang. The instance needs to be stopped with db2_kill to clean 
the situation. The needed crash recovery afterwards might need 
longer to complete, as more logfiles need to be processed. 
 
Stack for the DB2HMON agent: 
 0: _semtimedop_sys() 
 1: semtimedop() 
 2: sqloWaitEDUWaitPost() 
 3: SqlthStartStopControlEDU::stopEDU() 
 4: SqlthControllerManager::cancelAControlSubscription() 
 5: SqlthJobControl::~SqlthJobControl() 
 6: SqlthJobControl::~SqlthJobControl() 
 7: SqlthJob::~SqlthJob() 
 8: SqlthJob::~SqlthJob() 
 9: SqlthJobManager::removeJob() 
10: sqlrRunstatsTerminateJobServices() 
11: sqlrLocalRunstats() 
... 
 
db2throt shows the following stack: 
 0: _nanosleep_sys() 
 1: _nanosleep() 
 2: sqloSpinLockConflict() 
 3: SqlthControllerManager::HAS_NEW_JOB_STARTED_OR_COMPLETED() 
 4: SqlthControllerManager::asyncControllerMain() 
 5: SqlthStartStopControlEDU::_asyncControllerMain() 
 6: sqloCreateEDU() 
 7: sqloSpawnEDU() 
 8: SqlthStartStopControlEDU::startEDU() 
 9: SqlthControllerManager::newControlSubscription() 
10: SqlthJobControl::setPriority() 
...
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* ALL                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See error description above.                                 * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 9.1 Fix Pack 11.                      * 
****************************************************************
Local Fix:
available fix packs:
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
First fixed in DB2 Version 9.1 Fix Pack 11.
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC77015 IC78547 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
08.06.2011
08.12.2011
08.12.2011
Problem solved at the following versions (IBM BugInfos)
9.1.FP11
Problem solved according to the fixlist(s) of the following version(s)
9.1.0.11 FixList
This site uses cookies to make it easier for us to provide you with our services. By using our site you agree to the use of cookies.