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pbedorf's avatar
pbedorf
Icon for Nimbostratus rankNimbostratus
Sep 06, 2016

Intermittent 500 Internal Server Errors

Hi we are using BIG-IP 2000 with Software Version 11.6.0 Build 6.0.442. We are currently experiencing an intermittent issue with on of our pool members. Basically we get intermittent 500 Internal Server Error messages. Our website first points to Akamai Edge servers then back to our F5. We have confirmed that its not our members servers in the pool since accessing them by bypassing the F5 they work as expected. So it must be something between Akamai and F5. I did some reading on Akamai and they suggest we change the Pconn settings on our "origin" the load balancer to higher value as whats on Akamai. Currently on Akamai the Pconn setting is set to 600s how can i change the Pconn settings on F5 to a higher value? or has anyone experienced similar issue before and what was the solution?

 

Thank You

 

application delivery
BIG-IP

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  • Vijay_E's avatar
    Vijay_E
    Icon for Cirrus rankCirrus
    Sep 06, 2016

    By default F5 load balances per TCP connection. If you utilize OneConnect on the VS that is utilizing Akamai, load balancing will be done per HTTP request instead of per TCP connection and this should alleviate any issues.

     

    References:

     

    SOL7208

     

    Akamai Information

     

  • IainThomson85_1's avatar
    IainThomson85_1
    Icon for Cumulonimbus rankCumulonimbus
    Sep 07, 2016

    Does your monitor ever fail ? (Presuming you're doing a Layer 7 HTTP Check with a Recv 500 Disable string)

     

    Or are you picking up the 500 error some other day ?

     

    The application/server you're trying to connect to. Is there anything that suggests what would generate the 501 error, as 5XX Should be being generated by the server itself?