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Informix - Problem description

Problem IT16431 Status: Closed

IT IS POSSIBLE TO START MULTIPLE CLEAN_LTX THREADS TO CLEAN THE SAME
TRANSACTION DURING LONG TRANSACTION ROLLBACKS

product:
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10
Problem description:
It is possible for multiple clean_ltx threads to be started for
the same suspended
transaction.  It is possible (depending on when the clean_ltx
threads run)
for a clean_ltx thread to free a transaction, have another
thread use it and then have another clean_ltx thread
free that new transaction underneath the thread.

In such cases, the following problems have been observed:

11:20:13  Session completed abnormally. Rolling back tx id 31,
flags 0x108441b
11:20:13  Long Transaction 0x455e5388 Aborted. Rollback
Duration: 0 Seconds
11:20:15  Session completed abnormally. Rolling back tx id 31,
flags 0x84403
11:23:38  Assert Warning: Internal Error - Freeing transaction
entry that still holds locks!
11:23:38  IBM Informix Dynamic Server Version 12.10.FC4W1XAC
11:23:38   Who: Session(79, informix@server, 0, 0x455e5388)
                Thread(488, clean_ltx, 455a5fc8, 8)
                File: rsshmem.c Line: 2578
11:23:38   Results: Internally corrected
11:23:38  stack trace for pid 32591 written to
/opt/informix/tmp/af.5d07789
11:23:38   See Also: /opt/informix/tmp/af.5d07789
11:23:38  Internal Error - Freeing transaction entry that still
holds locks!
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users running XA who often have long global transactions     *
* aborted by the server.                                       *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Update to IBM Informix Server 12.10.xC8                      *
****************************************************************
Local Fix:
Solution
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
02.08.2016
09.12.2016
09.12.2016
Problem solved at the following versions (IBM BugInfos)
12.10.xC8
Problem solved according to the fixlist(s) of the following version(s)
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