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IJ29214: CCR ASSERTION WHEN NODES HOSTNAME IS ASSIGNED TO LOOPBACK

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APAR status

  • Closed as program error.

Error description

  • When node's hostname is assigned to loopback，
mmchnode --quorum -N node causes CCR assertion and even
CCR quorum loss.

From /var/adm/ras/mmsdrserv.log:
[E]
/project/spreltac503/build/rtac503s003a/src/avs/fs/mmfs/t
s/ccr/ccrutils.C:577: assertion 'ccrNodeId == iter->id'
failed

Reported In:
Spectrum Scale 5.0.2.3

Known Impact:
When the problem happens, mmsdrserv cannot startup, which
may cause CCR quorum loss.

Local fix

  • 



Problem summary


    

  • If a hostname is resolved to a loopback address,
the CCR component might run into an assertion of
type 'ccrNodeId == iter->id' when a node becomes
quorum node using the mmchnode or mmaddnode
command.

    



Problem conclusion


    

  • Benefits of the solution:
No more assert

Work around:
None

Problem trigger:
When a node is added as a quorum node and the
hostname is resolved to a loopback address.

Symptom:
Abend/Crash

Platforms affected:
ALL Operating System environments

Functional Area affected:
admin commands CCR

Customer Impact:
High Importance

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IJ29214
    • 

  • Reported component name
    SPEC SCALE STD
    • 

  • Reported component ID
    5737F33AP
    • 

  • Reported release
    510
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2020-11-10
    • 

  • Closed date
    2020-11-10
    • 

  • Last modified date
    2020-11-10
    • 





    

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

    
IJ26157
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    SPEC SCALE STD
    • 

  • Fixed component ID
    5737F33AP
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"STXKQY","label":"IBM Spectrum Scale"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"510","Line of Business":{"code":"LOB26","label":"Storage"}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            11 November 2020
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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