APAR status
Closed as fixed if next.
Error description
In certain circumstances, an onpload frontend thread may overflow its stack. This problem is more likely to be seen on HP Itanium. You need a new onpload shared memory segment to be added at the same time as the fork of the new convert thread for the problem to occur. By onpload shared memory segments, I mean the onpload private shared memory segments that start with 0x49 key -- Example: $ ipcs -m | grep 0x49 m 6094866 0x49010000 --rw-rw---- informix informix <--- onpload R segment m 5668883 0x49010001 --rw-rw---- informix informix <--- onpload initial V segment m 5931028 0x49010002 --rw-rw---- informix informix <--- onpload new V segment added after startup Note: The onpload stack size and the sizes of the onpload segments are not configurable. The problem occurs rarely and randomly during onpload job start -- when the problem segv does occur, if you have tracing turned on, you will see a line like this in the trace file: 02:29:28 - FORKED(worker, 12): convert 25 ... 02:29:28 - plsig_segv(convert, 25): signal received If you do not have tracing turned on, you may see a plsig_segv() message in stderr/stdout, but it probably will not say where it came from. The same job, when re-run may not run into the problem again.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * Informix 11.50, HP-UX Itanium 11.23 * **************************************************************** * PROBLEM DESCRIPTION: * * onpload may crash or hang shortly after a new shared memory * * segment is added. * **************************************************************** * RECOMMENDATION: * * Upgrade to Informix 11.50.xC8 or higher. * ****************************************************************
Problem conclusion
Temporary fix
Comments
For download information, go to: http://www.ibm.com/support/fixcentral
APAR Information
APAR number
IC70228
Reported component name
IBM IDS ENTRP E
Reported component ID
5724L2304
Reported release
B15
Status
CLOSED FIN
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2010-07-27
Closed date
2011-01-20
Last modified date
2011-01-20
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Applicable component levels
RB15 PSN
UP
RB15 PSY
UP
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Document Information
Modified date:
20 January 2011