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SE52613 - OSP FIX MESSAGE QUEUE LOGICAL DAMAGE RECOVERY INVOCATION

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 APAR (Authorized Program Analysis Report)

Abstract

OSP FIX MESSAGE QUEUE LOGICAL DAMAGE RECOVERY INVOCATION

Error Description

This problem deals with standard (nonprogram) message queues    
like QSYSOPR, QHST, user profile message queues, etc. It does  
not affect job log operations. When logical damage or          
corruption, on a message queue object, is detected by system    
code, it forces an MSGMCH0601 to cause message queue cleanup to
be invoked. The cleanup attempts to recover all messages that it
can and allow the message queue to be used again. Due to a      
low-level change in the system in an earlier release of the    
operating system, the MCH0601 is not being generated as        
expected. This causes message operations to continue running    
after logical damage or corruption is detected. This may cause a
loop or unpredictable results in the message operation.        

Problem Summary

****************************************************************
* PROBLEM: (SE52613) Licensed Program = 5770SS1                *
*           Looping Condition                                  *
****************************************************************
* USERS AFFECTED: All IBM i operating system users for i 7.1.  *
****************************************************************
* RECOMMENDATION: Apply PTF SI47378 for i 7.1.                 *
****************************************************************
This problem deals with standard (nonprogram) message queues    
like QSYSOPR, QHST, user profile message queues, etc. It does  
not affect job log operations. When logical damage or          
corruption, on a message queue object, is detected by system    
code, it forces an MSGMCH0601 to cause message queue cleanup to
be invoked. The cleanup attempts to recover all messages that it
can and allow the message queue to be used again. Due to a      
low-level change in the system in an earlier release of the    
operating system, the MCH0601 is not being generated as        
expected. This causes message operations to continue running    
after logical damage or corruption is detected. This may cause a
loop or unpredictable results in the message operation.        

Problem Conclusion

A change will be made in the receive message operation to use a
different method to force the MSGMCH0601. This will allow      
message queue damage recovery to be invoked as it was in the    
past.                                                          

Temporary Fix

                        *********                              
                        * HIPER *                              
                        *********                              

Comments

Circumvention


PTFs Available

R710 SI47378 PTF Cover Letter   2279

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... Yes
Component.................................. 5770SS1WM
Failing Module.......................... RCHMGR
Reported Release................... R710
Duplicate Of..............................




System i Support

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Document Information

Modified date:
13 October 2012