Fixes are available
APAR status
Closed as program error.
Error description
After applying WebSphere MQ v6.0.2.9, and specifically IZ62508, when enabling WMQ trace, a java core dump is generated. The javadump shows the stack to be within MQCMIT. The trace shows the last entry to be an MQPUT with MQPMO_SYNCPOINT. The process has used a single connection to the queue manager, and this connection was established with the option MQCNO_HANDLE_SHARE_NO_BLOCK, indicating that the hConn could be used on any thread (that is, it can be used from a thread that has not itself initialized with WMQ).
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Users calling MQCMIT from an application using shared hConn's (MQCNO_HANDLE_SHARE_BLOCK or MQCNO_HANDLE_SHARE_NO_BLOCK) when MQ trace is active, and 6.0.2.9 or later is applied (including MQ V7). Platforms affected: AIX,HP-UX (Itanium),HP-UX (PA-RISC),Linux (Power),Linux (s390x), Linux (x86),Linux (x86-64),Linux (zSeries),Solaris (SPARC), Solaris (x86-64),iSeries,All Unix **************************************************************** PROBLEM SUMMARY: IZ62508 corrected a problem where multiple threads detected the maximum size of a trace file (-l option to strmqtrc) had been reached. This involved adding serialization which required that the MQ thread control block be referenced. In the case of an MQCMIT call from an application thread using shared hConn's then the trace code was invoked before addressability to the MQ thread control block had been established leading to a SIGSEGV in xtrCheckTraceFile.
Problem conclusion
The fix to IZ62508 in the MQ trace code is changed not to depend upon addressability to the MQ thread control block having already been established. | MDVREGR 6.0.2-WS-MQ-Windows-FP0009 | | MDVREGR 6.0.2-WS-MQ-SolarisSparc64-FP0009 | | MDVREGR 6.0.2-WS-MQ-SolarisX64-FP0009 | | MDVREGR 6.0.2-WS-MQ-LinuxX64-FP0009 | | MDVREGR 6.0.2-WS-MQ-LinuxS390X-FP0009 | | MDVREGR 6.0.2-WS-MQ-LinuxPPC64-FP0009 | | MDVREGR 6.0.2-WS-MQ-LinuxIA32-FP0009 | | MDVREGR 6.0.2-WS-MQ-LinuxS390-FP0009 | | MDVREGR 6.0.2-WS-MQ-HpuxPaRISC64-FP0009 | | MDVREGR 6.0.2-WS-MQ-HpuxIA64-FP0009 | | MDVREGR 6.0.2-WS-MQ-AixPPC64-FP0009 | | MDVREGR 6.0.2-WS-MQ-Windows-FP0010 | | MDVREGR 6.0.2-WS-MQ-SolarisSparc64-FP0010 | | MDVREGR 6.0.2-WS-MQ-SolarisX64-FP0010 | | MDVREGR 6.0.2-WS-MQ-LinuxX64-FP0010 | | MDVREGR 6.0.2-WS-MQ-LinuxS390X-FP0010 | | MDVREGR 6.0.2-WS-MQ-LinuxPPC64-FP0010 | | MDVREGR 6.0.2-WS-MQ-LinuxIA32-FP0010 | | MDVREGR 6.0.2-WS-MQ-LinuxS390-FP0010 | | MDVREGR 6.0.2-WS-MQ-HpuxPaRISC64-FP0010 | | MDVREGR 6.0.2-WS-MQ-HpuxIA64-FP0010 | | MDVREGR 6.0.2-WS-MQ-AixPPC64-FP0010 | --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: v6.0 Platform Fix Pack 6.0.2.11 -------- -------------------- AIX U839822 HP-UX (PA-RISC) U840685 HP-UX (Itanium) U840690 Solaris (SPARC) U840686 Solaris (x86-64) U840693 iSeries tbc_p600_0_2_11 Linux (x86) U840687 Linux (x86-64) U840692 Linux (zSeries) U840688 Linux (Power) U840689 Linux (s390x) U840691 v7.0 Platform Fix Pack 7.0.1.6 -------- -------------------- AIX U840698 HP-UX (PA-RISC) U841555 HP-UX (Itanium) U841560 Solaris (SPARC) U841556 Solaris (x86-64) U841562 iSeries tbc_p700_0_1_6 Linux (x86) U841557 Linux (x86-64) U841561 Linux (zSeries) U841558 Linux (Power) U841559 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
IZ95846
Reported component name
WMQ LIN X86 V6
Reported component ID
5724H7204
Reported release
600
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-03-01
Closed date
2011-03-21
Last modified date
2011-10-11
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 LIN X86 V6
Fixed component ID
5724H7204
Applicable component levels
R600 PSY
UP
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Document Information
Modified date:
31 March 2023