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IZ74932: IOCP GETMULTIPLECOMPLETIONSTATUS() NEVER RETURNS APPLIES TO AIX 6100-06

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APAR status

  • Closed as program error.

Error description

  • When IOCP is on and used by DB2 at AIX 6.1 TL04, DB2
calls
sqloGetMultipleCompletionStatus() which in turn
calls AIX's IOCP extension.

The IOCP call GetMultipleCompletionStatus() never returns
causing I/O to stop when DB2 is in it's page cleaning
routines.

To see if you have the problem, dump the DB2 stack will
show something similar to:
0x090000000CE87364 sqloGetMultipleCompletionStatus + 0x24
0x0900000005803DA4
sqloLioAIOCollect__20SQLO_LIO_HANDLE_DATAFUlP23SQLO_LIO_C
OLLECT_STATUSPP11SQLO_IO_REQ13SQLO_LIO_PORT + 0x1074
0x0900000005802310 sqloLioCollectNBlocks + 0xB4
0x09000000057033E4
sqlbClnrCollectSomeAIO__FP12SQLB_CLNR_CBUl + 0x8C
0x0900000005703500
sqlbClnrCollectSomeAIO__FP12SQLB_CLNR_CBUl@glue13A1+ 0x78

Local fix

  • 1. Stay at 6.1 TL03 and below
or
2. Do not activate IOCP in DB2.

Problem summary

  • Application hang in GetMultipleConnectionStatus()
or system crash

Problem conclusion

  • Properly initialize AIO/IOCP requests with iocfd for correct
post I/O processing.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IZ74932
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2010-04-21
    • 

  • Closed date
    2010-04-21
    • 

  • Last modified date
    2013-03-28
    • 





    

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

    
IZ74508
    

    • 

  • 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  U832117
       UP10/09/01  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSAUMY","label":"IBM AIX Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11Q","label":"AIX 6.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            28 March 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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