Fixes are available
APAR status
Closed as program error.
Error description
A 32-bit application which is memory intensive, such as WebSphere Application Server or WebSphere Message Broker, may fail to connect to a V7.x queue manager, as it may run short of process address space and consequently fail to attach to queue manager related shared memory resources. The error will accompany FDCs with probe ID XY129037 reporting errno=24 (EMFILE - The process file table is full) from shmat() function. Major Errorcode reported in the FDC will be: xecX_E_SEGMENT_TABLE_FULL The error logs under /var/mqm/errors directory will record "AMQ6207: Failed to attach shared memory segment as Segment table is Full." - error message.
Local fix
See technote 1298595 for available options.
Problem summary
**************************************************************** USERS AFFECTED: Users using 32 bit applications which connect to queue manager in shared binding mode in AIX Platforms affected: AIX **************************************************************** PROBLEM SUMMARY: In order to connect to a local queue manager, MQ needs to attach to a trace shared memory segment and an IPCC shared memory segment. The IPCC shared memory segment used to be exactly 256MB, but that meant that MQ needed at least two free segments to connect successfully. The APAR IY99425 introduced a change in MQ v6 to accommodate trace and ipcc segments in a single 256 MB shared memory segment by reducing the size of IPCC segment by the size of the trace segment. However in MQ V7 and higher versions, due to miscalculation in the trace segment size, MQ was not able to accommodate the trace and ipcc segments in a single 256 MB shared memory segment.
Problem conclusion
MQ has been modified to correct the miscalculation in the trace segment size so that trace and shared memory segments can be accommodated in a single 256 MB shared memory segment. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v7.0 7.0.1.12 v7.1 7.1.0.5 v7.5 7.5.0.4 The latest available maintenance can be obtained from 'WebSphere MQ Recommended Fixes' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037 If the maintenance level is not yet available information on its planned availability can be found in 'WebSphere MQ Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IC97468
Reported component name
WMQ BASE MULTIP
Reported component ID
5724H7241
Reported release
750
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-11-06
Closed date
2013-12-19
Last modified date
2014-01-13
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
WMQ BASE MULTIP
Fixed component ID
5724H7241
Applicable component levels
R750 PSY
UP
[{"Line of Business":{"code":"LOB45","label":"Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSFKSJ","label":"WebSphere MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.5"}]
Document Information
Modified date:
22 September 2021