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MA44999 - OSP-THREADS-INCORROUT UNEXPECTED MCH3601 OR MCH0601 MAY RESULT
ON A SYSTEM USING 4096 SECTORED UNITS.

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 APAR (Authorized Program Analysis Report)

Abstract

OSP-THREADS-INCORROUT UNEXPECTED MCH3601 OR MCH0601 MAY RESULT
ON A SYSTEM USING 4096 SECTORED UNITS.

Error Description

On a system using 4096 sectored units, unexpected MSGMCH3601 and
MSGMCH0601 may occur. This may result in unexpected            
behavior from IBM HTTP Apache servers and cause the server to  
stop responding to requests.                                    
The symptom is not limited to HTTP.                            
Failures can include damaged journal receivers, MSGMCH0601,    
MSGMCH3601, heap errors, HTTP server failures, jobs not        
ending, etc.  There could be other storage related errors as    
well.                                                          
Here's how to tell if you have a '4096' type drive.            
the drive type is either D840 or specifically 6B4E-050.        
   a) WRKDSKSTS OUTPUT(*PRINT) can be used to verify that drive
type is D840, but will NOT show the model for 6B4E.  Use        
DSPHDWRSC to confirm 6B4E-050.                                  
   b) DSPHDWRSC TYPE(*STG) OUTPUT(*PRINT) can be used to verify
6B4E-050 device type and model.                                

Problem Summary

****************************************************************
* PROBLEM: (MA44999) Licensed Program = 5770999 for i 7.2      *
*           Usability of a Product's MAJOR Function            *
*            IBM HTTP Apache servers fail.                     *
****************************************************************
* USERS AFFECTED: All IBM i operating system 4096-sectored     *
*                  DASD users.                                 *
****************************************************************
* RECOMMENDATION: Apply LIC PTF MF60808 for i 7.2.             *
****************************************************************
********                                                        
On a system using 4096 sectored units unexpected MCH3601 and    
MCH0601 may occur. This may result in unexpected behavior      
from IBM HTTP Apache servers and cause the server to stop      
responding to requests.                                        

Problem Conclusion

The problem has been fixed.                                    

Temporary Fix

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

Comments

Circumvention


PTFs Available

R720 MF60808 PTF Cover Letter   6127
R730 MF61245 PTF Cover Letter   6085

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... Yes
Component.................................. 9400DG300
Failing Module.......................... RCHMGR
Reported Release................... R720
Duplicate Of..............................




System i Support

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Document Information

Modified date:
03 June 2016