APAR status
Closed as program error.
Error description
When starting an execution group by starting a new address space on z/OS the broker creates a semaphore and listens on that semaphore for some actions. If when waiting for the semaphore actions the semaphore wait is interrupted with an EINTR signal, then the broker issues a BIP9241E error message with a return code of 120, thinks the EG has not started and then tries to restart it. This leads to multiple address spaces being started for the same execution group. The broker should handle this return code and wait again on the semaphore. The following error is seen in the broker joblog: BIP9241E MQ01BRK 43 AN INTERNAL ERROR OCCURRED WITH A DATAFLOWENGINE ADDRESS SPACE, RETURNCODE 120, REASONCODE 0. : ImbProcess(820)
Local fix
N/A
Problem summary
**************************************************************** USERS AFFECTED: All users of WebSphere Message Broker on z/OS. Platforms affected: z/OS **************************************************************** PROBLEM SUMMARY: When starting an execution group by starting a new address space on z/OS the broker creates a semaphore and listens on that semaphore for some actions. If when waiting for the semaphore actions the semaphore wait is interrupted with an EINTR signal then the broker issues a BIP9241E error message with a return code of 120, thinks the EG has not started and then tries to restart it. This leads to multiple address spaces being started for the same execution group. The broker should handle this return code and wait again on the semaphore. The following error is seen in the broker joblog: BIP9241E MQ01BRK 43 AN INTERNAL ERROR OCCURRED WITH A DATAFLOWENGINE ADDRESS SPACE, RETURNCODE 120, REASONCODE 0. : ImbProcess(820)
Problem conclusion
WebSphere Message Broker has been modified to handle the EINTR return code when waiting on the semaphore which is used to monitor for successful address space and execution group creation. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Platform v8.0 -------- -------------------- Multiplatforms 8.0.0.3 The latest available maintenance can be obtained from 'WebSphere Message Broker Recommended Fixes' http://www.ibm.com/support/docview.wss?rs=849&uid=swg27006041 If the maintenance level is not yet available, information on its planned availability can be found in 'WebSphere Message Broker Planned Maintenance Release Dates' http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
PM87175
Reported component name
WEB MB Z/OS
Reported component ID
5697P4400
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-04-17
Closed date
2013-05-08
Last modified date
2013-05-08
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
WEB MB Z/OS
Fixed component ID
5697P4400
Applicable component levels
R800 PSY
UP
[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M"},"Platform":[{"code":"PF054","label":"z Systems"}],"Version":"8.0"}]
Document Information
Modified date:
01 November 2021