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SE42757 - DISABLING WMQ EXPIRER TASK CAN CAUSE QUEUE MANAGER TO ABEND
SHORTLY AFTER STARTUP

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 APAR (Authorized Program Analysis Report)

Abstract

DISABLING WMQ EXPIRER TASK CAN CAUSE QUEUE MANAGER TO ABEND
SHORTLY AFTER STARTUP

Error Description

Queue Manager can abend shortly after start up if the Expirer  
task has been disabled. AMQZXMA0 job will end because it is    
looking for a child process that has ended. AMQZMUC0 is that    
child process. It can end abnormally with an MCH3601 T/        
LIBMQMCS_R F/ LIBMQMCS_R under certain circumstances of the job
startup.                                                        
                                                               
Discovered at 6.0.2.8.                                          
                                                               
| Probe Id :- XY353001                                          
| Component :- xehAS400ConditionHandler                        
| SCCS Info :- lib/cs/unix/as400/amqxerrx.c, 1.51.1.2          
| Line Number :- 651                                            
| Build Date :- Jan 14 2010                                    
| CMVC level :- p600-L100114M                                  
| UserID :- -00192209 (QMQM)                                    
| Job Name :- xxxxxx/QMQM/AMQZMUC0                              
| Job Description :- QMQM/QMQMJOBD                              
| Submitted By :- xxxxxx/QMQM/AMQZXMA0                          
| Activation Group :- 17 (QMQM) (QMQM/AMQZMUC0)                
| Max File Handles :- 200                                      
| Process :- 00001074                                          
| Thread :- 00000004                                            
| ConnId[1] IPCC :- 19                                          
| ConnId[2] QM :- 13                                            
| Major Errorcode :- STOP                                      
| Minor Errorcode :- OK                                        
| Probe Type :- HALT6109                                        
| Probe Severity :- 1                                          
| Probe Description :-                                          
| FDCSequenceNumber :- 0                                        
| Arith1 :- 4 0x'4'                                            
| Arith1 :- 4 0x'4'                                            
| Arith2 :- 4 0x'4'                                            
| Comment1 :- MCH3601                                          
| Comment2 :- CPF9999                                          
+-------------------------------                                
MQM Function Stack                                              
zmuThreadMain                                                  
zmuAsyncQActivityTask                                          
kpiAsyncQActivityTask                                          
apiWakeExpirers                                                
aocWakeActivityWaiters                                          
xcsRequestMutexSem                                              
xcsFFST                                                        

Problem Summary

****************************************************************
USERS AFFECTED:                                                
WMQ users looking to disable the Expirer task                  
                                                               
Platforms affected:                                            
iSeries                                                        
                                                               
****************************************************************
PROBLEM SUMMARY:                                                
WMQ code was not properly accounting for scenarios where the    
Expirer task interval had been set to 0. This was resulting in  
working with uninitialized storage.                            

Problem Conclusion

WMQ code will be modified to properly account for when the      
Expiry Interval is disabled.                                    
                                                               
MDVREGR SI36917 (7.0.1.1)                                      
MDVREGR SI38999 (7.0.1.2)                                      
                                                               
---------------------------------------------------------------
The fix is targeted for delivery in the following PTFs:        
                                                               
                   v6.0                                        
Platform           Fix Pack 6.0.2.10                            
--------           --------------------                        
iSeries            tbc_p600_0_2_10                              
                                                               
                   v7.0                                        
Platform           Fix Pack 7.0.1.3                            
--------           --------------------                        
iSeries            tbc_p700_0_1_3                              
                                                               
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

Circumvention


PTFs Available

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... No
Component.................................. 5724H7206
Failing Module.......................... RCHMGR
Reported Release................... R600
Duplicate Of..............................




System i Support

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Document Information

Modified date:
16 June 2010