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SE30649 - MQM400-MSGAMQ9507 MQM400-AMQ9507 FOR *SDR CHANNEL AFTER V6

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 APAR (Authorized Program Analysis Report)

Abstract

MQM400-MSGAMQ9507 MQM400-AMQ9507 FOR *SDR CHANNEL AFTER V6

Error Description

After a V6 migration, a *SDR channel will go into Retrying      
state. The queue manager error logs shows an AMQ9507 error      
message: Channel 'channelname' is currently in-doubt.          
The details of the message is showing the channel is in-doubt  
with an invalid or non-existent queue manager.                  
Option 8 on the channel shows multiple channel states and one  
of the Saved states has a connection name of the invalid or    
non-existent queue manager.                                    

Problem Summary

After migration to WMQv6, a *SDR channel which has more than    
two saved states before migration; goes into a Retrying state.  
This failure logs AMQ9507 to the Queue Manager error logs for  
example:                                                        
AMQ9507: Channel 'CHL3' is currently in-doubt                  
                                                               
Note: Additionally the remote queue manager in the 'Cause'      
section of the message, is incorrect.                          
                                                               
Channels with more than one saved state, have multiple sync    
records. WMQ reads these records one by one from the sync file  
until it finds the correct record or fails with an error.      
                                                               
In the failing scenario on iSeries, this loop breaks            
prematurely due to a failure at rrxConvertSyncRecord because of
a wrong buffer length calculation, this reflects in            
rrxConvertSyncRecord returning rrcW_TRUNCATED, which in turn    
leads to rriCheckSync returning rrcE_CHANNEL_INDOUBT. Because  
of the indoubt return code, the channel will not start.        

Problem Conclusion

WMQ code has been modified to correct the buffer length        
calculation to ensure that rrxConvertSyncRecord gets the right  
buffer length for it's calculations. This in turn avoids the    
failure of rrxConvertSyncRecord returning rrcW_TRUNCATED,      
ensures that a channel with multiple saved states gets          
migrated and goes into a RUNNING state as expected.            
                                                               
---------------------------------------------------------------
The fix is targeted for delivery in the following PTFs:        
                                                               
                   v6.0                                        
Platform           Fix Pack 6.0.2.4                            
--------           --------------------                        
iSeries            SI31813                                      
                                                               
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


None                                                            

PTFs Available

R600 SI47898 PTF Cover Letter   1000

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:
11 December 2012