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IV59681: LOSS OF REPOS AND REBOOT IN UNICAST CLUSTER CAUSES DMS TIMEOUT APPLIES TO AIX 7100-04

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APAR status

  • Closed as program error.

Error description

  • With a HA 7.1.3 unicast 2-node cluster, if the node
with the storage having the LUN for the rep disk fails,
the entire cluster may go down if the other node is
rebooting/down. This is due to CAA unable to do a send
via
tcpsock connections (since other node is rebooting) and
unable to do a send via dpcomm (since rep disk failed),
causing a deadman switch timeout, despite ethernet and/or
sancomm connections being healthy.

Local fix

  • 



Problem summary


    

  • 2-node unicast cluster, if the node with the LUN for
the repository is lost (e.g., power loss to the
building), the other node will go down as well due
to deadman switch timeout.

    



Problem conclusion


    

  • If using unicast and repository is down and an ethernet and/or
sancomm interface is healthy, send deadman swith heartbeat,
preventing deadman switch timeout.

    



Temporary fix


    

  • 



Comments


    

  • 6100-09 - use AIX APAR IV59209
6100-09 - use AIX APAR IV59209
6100-09 - use AIX APAR IV59209
7100-03 - use AIX APAR IV58961
7100-04 - use AIX APAR IV59681

    



APAR Information




    

  • APAR number
    IV59681
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2014-04-23
    • 

  • Closed date
    2014-04-23
    • 

  • Last modified date
    2016-05-10
    • 





    

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

    
IV58961
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U861566
       UP15/11/22  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            10 May 2016
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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