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Informix - Problem description

Problem IT40822 Status: Closed

MULTISET QUERY PRODUCES MEMORY LEAKS AND CRASHES

product:
INFORMIX SERVER / 5725A3900 / E10 - 
Problem description:
running following query throws error and crashes the server:

select
  t.i,
  row(
    multiset(
      select * from u where u.i = t.i
    )
  ) r
from t
order by t.i;

You will get following error in your console:
 9791: User Defined Routine (collectionoutput) execution failed.

Online.log:

14:03:32  Maximum server connections 1
14:03:32  Checkpoint Statistics - Avg. Txn Block Time 0.000, #
Txns blocked 0, Plog used 10, Llog used 2

14:10:19  Assert Failed: Exception Caught. Type: MT_EX_OS,
Context: mem
14:10:19  IBM Informix Dynamic Server Version 14.10.FC7W1DE
14:10:19   Who: Session(38, informix@hostname, 24921,
0x454832a8)
                Thread(54, sqlexec, 45442e70, 1)
                File: mtex.c Line: 481
14:10:19   Action: Please notify IBM Informix Technical Support.
14:10:19  stack trace for pid 23384 written to
/informix/products/14.10.FC7W1/tmp/af.41e3bf2
14:10:19   See Also:
/informix/products/14.10.FC7W1/tmp/af.41e3bf2, shmem.41e3bf2.0
14:10:21  Exception Caught. Type: MT_EX_OS, Context: mem
14:10:21  (-9791): ERROR: Routine execution trap --
procname= procid=18
    reason: mem
14:12:08  Assert Failed: Thread exited with 1 buffers held.

14:12:08  IBM Informix Dynamic Server Version 14.10.FC7W1DE
14:12:08   Who: Session(38, informix@hostname, 24921,
0x454832a8)
                Thread(54, sqlexec, 45442e70, 1)
                File: rsshmem.c Line: 1990
14:12:08   Results: Dynamic Server must abort
14:12:08  stack trace for pid 23384 written to
/informix/products/14.10.FC7W1/tmp/af.41e3bf2
14:12:08   See Also:
/informix/products/14.10.FC7W1/tmp/af.41e3bf2
14:12:09  Thread ID 54 will NOT be suspended because
          it is holding a buffer.
14:12:09   See Also:
/informix/products/14.10.FC7W1/tmp/af.41e3bf2
14:12:09  Starting crash time check of:
14:12:09  1. memory block headers
14:12:09  2. stacks
14:12:09  Crash time checking found no problems
14:12:09  rsshmem.c, line 1990, thread 54, proc id 23384, Thread
exited with 1 buffers held.
.
14:12:09  The Master Daemon Died
14:12:09  PANIC: Attempting to bring system down
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.xC9.                 *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 14.10.xC9.                        *
****************************************************************
Local Fix:
Solution
Workaround
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.xC9.                 *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 14.10.xC9.                        *
****************************************************************
Comment
Fixed in Informix Server 14.10.xC9.
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
04.05.2022
30.09.2022
30.09.2022
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)