IBM Support

LI77734: SNATNSRVR_MT CORE DUMP WITH LARGE NUMBER OF SSL SESSIONS

A fix is available

Communications Server for Linux, Version 6.4 -- Latest Fixpack

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APAR status

  • Closed as program error.

Error description

  • Communications Server for Linux, Version 6.4
Communications Server for Data Center Deployment, Version 7
-----------------------------------------------------------
With a large number of SSL clients, the TN3270 Server process
may core dump.

Local fix

  • 



Problem summary


    

  • In the interface to the GSKit (SSL) code, there is a poll
mechanism for file descriptors (sockets, for our purposes)
to let us know when data is available for reading. For this
poll mechanism, there is a limit of 1024 descriptors, above
which behavior "becomes unpredictable". Whether it continues
to work as expected beyond that appears to depend on the
specific OS and GSKit levels in use.

    



Problem conclusion


    

  • The TN Server code has been modified to work within this
limitation.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    LI77734
    • 

  • Reported component name
    CS LINUX ON ZSE
    • 

  • Reported component ID
    5724I3400
    • 

  • Reported release
    640
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2013-12-13
    • 

  • Closed date
    2013-12-13
    • 

  • Last modified date
    2014-08-29
    • 





    

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

    • 

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

    
LI77775 LI77776 LI78034
    

    • 



Fix information


    

  • Fixed component name
    CS LINUX ON ZSE
    • 

  • Fixed component ID
    5724I3400
    • 



Applicable component levels


    

  • R640  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSDMF3","label":"Communications Server for Linux on zSeries"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"640","Line of Business":{"code":"LOB35","label":"Mainframe SW"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            14 October 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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