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MA47313 - IPL-SRCC6004052-WAIT IPL HANGS AT C6004052

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 APAR (Authorized Program Analysis Report)

Abstract

IPL-SRCC6004052-WAIT IPL HANGS AT C6004052

Error Description

IPL hangs at SRCC6004052 Trace initialization.                  

Problem Summary

Please see the ERROR DESCRIPTION section.                      

Problem Conclusion

In the trace system control block there is a list of LIC trace  
definition tables and their control segments. One control      
segment was either corrupt or had been destroyed but not removed
from the table list. During the IPL, the LIC Trace code tries to
verify the list of trace tables and cleanup any bad trace      
definition tables by removing the segment pointer from the trace
system control block. The trace code tries to get a exclusive  
gate lock on the trace system control block, but the control    
block already has a shared lock. The trace code tries to wait  
for the exclusive lock but the shared lock is never released.  
The LIC code doesn't have a method to convert the shared lock  
into an exclusive lock.                                        
                                                               
The LIC Trace code was changed to remove the shared lock before
calling the delete code.                                        
The LIC Trace code is then able to get the exclusive lock on the
trace system control block and complete the clean up.          

Temporary Fix

Comments

Circumvention


PTFs Available

R710 MF65852 PTF Cover Letter   1000
R720 MF65405 PTF Cover Letter   9123
R730 MF65406 PTF Cover Letter   9116

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... Yes
Component.................................. 9400DG300
Failing Module.......................... RCHMGR
Reported Release................... R710
Duplicate Of..............................




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Document Information

Modified date:
17 May 2019