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IV70119: AIX NFS4CL CMD INCORRECTLY ALLOWS RPC TIMEOUT OF LESS THA 5 SEC APPLIES TO AIX 6100-08

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APAR status

  • Closed as program error.

Error description

  • The lowest allowed RPC timeout on AIX NFS client (all NFS
versions), is 5 seconds. This is a hardcoded lower limit.
In the case of NFSv4, the nfs4cl command allows admins
to incorrectly set values less than 5 seconds using the
setfsoptions subcommand. A low value for timeouts, such
as
1 second, causes frequent RPC timeouts in cases where the
NFS server is very busy and IO calls take longer than
1 second.
Problem does not happen when configuring the timeo option
using mount command. This is an issue only when the
"nfs4cl setfsoptions timeo=X" command is used.

Local fix

  • Do not set "timeo" option to less than 50 (5 seconds).

Problem summary

  • Frequent RPC Timeouts occur on the customr's system

Problem conclusion

  • In update_args(), add a check for upper and lower limit bounds
for timeout values

Temporary fix

  • 



Comments


    

  • 6100-08 - use AIX APAR IV70119
6100-09 - use AIX APAR IV63920
7100-02 - use AIX APAR IV60608
7100-03 - use AIX APAR IV63959

    



APAR Information




    

  • APAR number
    IV70119
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2015-02-27
    • 

  • Closed date
    2015-02-27
    • 

  • Last modified date
    2015-09-30
    • 





    

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

    
IV60608
    

    • 

  • 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  U868390
       UP15/09/18  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            17 December 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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