APAR status
Closed as program error.
Error description
When environment variable GL_USEGLU is set, a different dynamic library is loaded to handle UTF8 locales. This library needs more stack space than normally. Occasionally the server checks if there is more stack space left than 32 KB plus some stack margin value (a couple of KB). But this check is not performed on every function call. This can result in stack overflow if a call to the GLU library is made. If the stack check is done on a 32 KB stack, it will always result in the allocation of a new stack visible in onstat -g stk. For this reason, starting with a 32 KB stack makes no sense and is dangerous. The minimum allowed thread stack size when GL_USEGLU is set should be at least 64 KB. In 32 bit ports of IDS, the default in the onconfig file currently is only 32 KB.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * All users. * **************************************************************** * PROBLEM DESCRIPTION: * * When environment variable GL_USEGLU is set, a different * * dynamic library is loaded to handle UTF8 locales. This * * library needs more stack space than * * normally. Occasionally the server checks if there is more * * stack space left than 32 KB plus some stack margin value (a * * couple of KB) but this check is * * not performed on every function call. This can result in * * stack overflow if a call to the GLU library is made. * **************************************************************** * RECOMMENDATION: * * Upgrade to Informix 11.50.xC9 when available. * ****************************************************************
Problem conclusion
The problem is fixed in Informix 11.50.xC9.
Temporary fix
Comments
APAR Information
APAR number
IC75819
Reported component name
IBM IDS ENTRP E
Reported component ID
5724L2304
Reported release
B15
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-04-14
Closed date
2011-09-27
Last modified date
2011-09-27
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
IBM IDS ENTRP E
Fixed component ID
5724L2304
Applicable component levels
RB15 PSY
UP
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Document Information
Modified date:
27 September 2011