IBM Support

MA44284 - LIC-OTHER-WAIT SYSTEM TASKS CLEANED UP PREMATURELY WHEN AN
INTERNAL CONNECTION CLOSES UNEXPECTEDLY.

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 APAR (Authorized Program Analysis Report)

Abstract

LIC-OTHER-WAIT SYSTEM TASKS CLEANED UP PREMATURELY WHEN AN
INTERNAL CONNECTION CLOSES UNEXPECTEDLY.

Error Description

When an internal connection (IPCF) closes unexpectedly, and    
internal IO structure is cleaned up. The IO task that uses the  
structure fails when trying to reference that structure. The IO
task failure prevents IOs from completing, and can eventually  
lead to a system hang. Fix will be to prevent task failure when
connection closes unexpectedly.                                
                                                               
Service Keywords:                                              
IOAM--bbbbcccc-x task Orphaned                                  
IoNioImClientRspFctrySioa                                      
IoNioImAction                                                  
src57B59051 57B59051 against redundant controllers              
src57B59070 57B59070 against redundant controllers              
src57B59072 57B59072 against redundant controllers              
srcB6005120 B6005120 against redundant controllers              

Problem Summary

When an internal connection (IPCF) closes unexpectedly, and    
internal IO structure is cleaned up. The IO task that uses the  
structure fails when trying to reference that structure. The IO
task failure prevents IOs from completing, and can eventually  
lead to a system hang. Fix will be to prevent task failure when
connection closes unexpectedly.                                
                                                               
Service Keywords:                                              
IOAM--bbbbcccc-x task Orphaned                                  
IoNioImClientRspFctrySioa                                      
IoNioImAction                                                  
src57B59051 57B59051 against redundant controllers              
src57B59070 57B59070 against redundant controllers              
src57B59072 57B59072 against redundant controllers              
srcB6005120 B6005120 against redundant controllers              

Problem Conclusion

IOA manager will change the device concurrent maintenance      
response processing to accommodate the case when the IPCF      
connection might have closed. The concurrent maintenance command
will be failed back. IOA manager's task will stay up to process
future requests.                                                

Temporary Fix

Comments

Circumvention


PTFs Available

R710 MF59578 PTF Cover Letter   5142
R720 MF59576 PTF Cover Letter   5135

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... No
Component.................................. 9400DG300
Failing Module.......................... RCHMGR
Reported Release................... R710
Duplicate Of..............................




System i Support

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Document Information

Modified date:
30 May 2015