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IV01983: JFS2 FILE SYSTEM CORRUPTION DURING FILE CREATION/DELETION APPLIES TO AIX 6100-07

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APAR status

  • Closed as program error.

Error description

  • File system corruption seen especially when files are
created and deleted rapidly.  The fsck reports:
*** Phase 5 - Check block allocation map
bmap: /341/417/map bad
bmap: bn = 630272
 w  FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF
    FFFFFFFF FFFFFFFF FFFFFFFF
 p  FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF FFFFFFFF
    FFFFFFFF FFFFFFFF FFFFFFFF
 x  FFFFFFFF FFFFFFFF 7FFFFFFF FFFFFFFF FFFFFFFF
    FFFFFFFF FFFFFFFF FFFFFFFF
Block allocation map is corrupt (NOT FIXED)
Block allocation map is corrupt

where wmap and pmap are the same (or close) and have bits
that the xt map does not have.  Also, there are no disk
errors on the system at that time for that file system.

Local fix

  • Repair the file system by using the fsck command.

Problem summary

  • fsck reports fs corruption on the test fs after running stress
tests. This can happen if customer has multiple threads
appending to multiple files at the same time and then right
after the append, the files got removed. If timing is correct
the transaction from the append will be unprocessed by the time
j2_remove() get called. And j2_remove() will leave that
transaction behind.

Problem conclusion

  • After removed, if the file has zero link then merge the
anonymous transaction to the globla transaction block
so the transaction will get processed

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV01983
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2011-06-15
    • 

  • Closed date
    2011-06-15
    • 

  • Last modified date
    2013-04-07
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    
IV01395
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    AIX 610 STD EDI
    • 

  • Fixed component ID
    5765G6200
    • 



Applicable component levels


    

  • R610  PSY  U838167
       UP11/10/20  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            07 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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