APAR status
Closed as program error.
Error description
In some circumstances on slow systems if execution groups are repeatedly being stopped and started then it's possible for multiple execution group processes to be started for the same execution group which then leads to a loop as the second execution groups shuts down with the following error and is then restarted: +BIP2112E (Msg 1/1) MQxxBRK EGx 0 MESSAGE BROKER INTERNAL ERROR: DIAGNOSTIC INFORMATION 'Failed to acquire execution group lock - duplicate execution group processes?', 'ImbFile::WriteLock::WriteLock() reported 'Failed to acquire write lock on file' with values... ''Failed to acquire write lock on file'' ''/u/wmqixx/broker/components/MQ10BRK/5 xxxxxxx-yyyy-zzzz-aaaa-bbbbbbbbbbbb/.lock'' '112''.
Local fix
NA
Problem summary
**************************************************************** USERS AFFECTED: All users of IBM Integration Bus V9.0. Platforms affected: z/OS, MultiPlatform **************************************************************** PROBLEM DESCRIPTION: In some circumstances on slow systems, if execution groups are repeatedly being stopped and started, then it's possible for multiple execution group processes to be started for the same execution group. This leads to a loop as the second execution group shuts down with the following error and is then restarted: +BIP2112E (Msg 1/1) MQxxBRK EGx 0 MESSAGE BROKER INTERNAL ERROR: DIAGNOSTIC INFORMATION 'Failed to acquire execution group lock - duplicate execution group processes?', 'ImbFile::WriteLock::WriteLock() reported 'Failed to acquire write lock on file' with values... ''Failed to acquire write lock on file'' ''/u/wmqixx/broker/components/MQ10BRK/5 xxxxxxx-yyyy-zzzz-aaaa-bbbbbbbbbbbb/.lock'' '112''.
Problem conclusion
The product has changed to improve control of execution group startup and stop to avoid duplicate execution group processes being started. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v9.0 9.0.0.11 The latest available maintenance can be obtained from: http://www-01.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 on: http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308 ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
PI86447
Reported component name
WEB MB Z/OS
Reported component ID
5697P4400
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-08-25
Closed date
2018-06-13
Last modified date
2018-06-13
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
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","label":"APARs - z\/OS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
13 June 2018