Fixes are available
APAR status
Closed as program error.
Error description
Probe Id :- XC130003 Component :- xehExceptionHandler Comment1 :- SIGSEGV: address not mapped . The trace history in the FDC file shows that the WebSphere MQ client code was in the middle of a call to the server. At that time it was interrupted and a new call was attempted from application code into WebSphere MQ's API. (The API includes calls to WebSphere MQ's XA functions). This was the sequence: . -{ MQGET ... --{ MakeCall ... ---{ ccxReceive ----{ cciTcpReceive -----{ ccxAllocMem -----} ccxAllocMem rc=OK -----{ recv -----} recv rc=Unknown(FFFF) -----{ xcsWaitFd ------{ poll -------{ XAEnd <--------- New call through MQ's API --------{ MakeCall ---------{ ccxAllocMem
Local fix
Problem summary
**************************************************************** USERS AFFECTED: Applications using the WebSphere MQ Extended Transactional Client that have handlers installed that might get control while in the middle of a WebSphere MQ API call. Platforms affected: All Distributed (iSeries, all Unix and Windows) **************************************************************** PROBLEM SUMMARY: While this interrupting and calling into the API is not correct use of WebSphere MQ's API it should still be handled more gracefully. A SIGSEGV should not be generated. The more desirable behaviour is for our xa_end call to fail, returning with rc=XAER_PROTO.
Problem conclusion
Improved checking has been added to the WebSphere MQ code so that incorrect calls through the API (eg. from handlers that get control while an existing API call is in progress) are rejected with a sensible return code. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: v6.0 Platform Fix Pack 6.0.2.6 -------- -------------------- Windows U200299 AIX U819350 HP-UX (PA-RISC) U819028 HP-UX (Itanium) U819230 Solaris (SPARC) U819232 Solaris (x86-64) U819240 iSeries tbc_p600_0_2_6 Linux (x86) U818989 Linux (x86-64) U819234 Linux (zSeries) U819231 Linux (Power) U819029 Linux (s390x) U819233 v7.0 Platform Fix Pack 7.0.0.2 -------- -------------------- Windows U200302 AIX U822354 HP-UX (PA-RISC) U822349 HP-UX (Itanium) U822351 Solaris (SPARC) U822353 Solaris (x86-64) U822394 iSeries tbc_p700_0_0_2 Linux (x86) U822348 Linux (x86-64) U822393 Linux (zSeries) U822352 Linux (Power) U822350 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
IZ36038
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
2008-10-29
Closed date
2008-11-21
Last modified date
2009-03-10
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