DB2 FOR LUW / DB2FORLUW / A10 - DB2

When a federated server utilizing two-phase-commit starts up it 
will hold the tranEntry latch.  If the federated query involves 
connecting back into the same database then it will start an 
agent that will try to get the dblatch. 
 
Since snapshot processing first gets the dblatch and then tries 
to get the tranEntry latch, it is possible for a hang to occur 
if a LOCK snapshot is processing when such federated query 
processing is running.

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* USERS AFFECTED:                                              * 
* Anybody using federated transaction two phase commit         * 
* transaction and LOCK snapshots                               * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to Version 10.1 Fix Pack 4                           * 
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This hang can be avoided if the federated transaction does not 
require two phase commit. Two phase commit can be disabled as 
follows: 
 
alter server <server name> options (set DB2_TWO_PHASE_COMMIT 
'N')

DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
 DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows
 

Problem was first fixed in Version 10.1 Fix Pack 4

not known / see Local fix

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

17.09.2013
02.06.2014
02.06.2014