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IJ16283: CLOCK JUMP FORWARD CAUSED NODE FAILURE EVENT AND CES FAILURE

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APAR status

  • Closed as program error.

Error description

  • If clock jump forward more than 160 seconds, then the
internal command "tsctl nQstatus -Y" will return a status
of "unresponsive". This will trigger the
gpfs_unresponsive
event and causing CES to failover to other nodes.

Local fix

  • 



Problem summary


    

  • If clock jump forward more than 160 seconds, then the
internal command "tsctl nQstatus -Y" will return a status
of "unresponsive". This will trigger the gpfs_unresponsive
event and causing CES to failover to other nodes.

    



Problem conclusion


    

  • The solution uses TickTime (based on ticks since boot)
instead of HiResTime to track 'lastHealthUpdate' time.
This avoids node being transiently flagged as unresponsive
when the system clock is changed (via 'date' command or by NTP)

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IJ16283
    • 

  • Reported component name
    SPEC SCALE ADV
    • 

  • Reported component ID
    5737F35AP
    • 

  • Reported release
    502
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2019-05-20
    • 

  • Closed date
    2019-06-12
    • 

  • Last modified date
    2019-06-12
    • 





    

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

    • 

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

    
IJ18165
    

    • 



Fix information


    

  • Fixed component name
    SPEC SCALE ADV
    • 

  • Fixed component ID
    5737F35AP
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"STXKQY","label":"IBM Spectrum Scale"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"502","Edition":"","Line of Business":{"code":"LOB26","label":"Storage"}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            12 June 2019
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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