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mithuuu85's avatar
mithuuu85
Icon for Nimbostratus rankNimbostratus
Jul 22, 2019

Website is not loading fully sometime

Hi,

 

I am facing issue with my website hosted behind F5, it works properly but sometime page is not loading fully, based on the issue we took the packet capture and can see the logs "TCP zerowindow" message is senting by F5 to Server and "TCP window full" message is sending by Server to F5 and F5 is reset the connection after this message. We did the fine-tuning for TCP profile but still the same issue, Kindly need support to solve this issue.

 

 

  • JG's avatar
    JG
    Icon for Cumulonimbus rankCumulonimbus

    I don't see anything conclusive from the above data.

     

    What sort of the client was involved, and did this occur to more than one client?

  • Hi,

     

    client is normal desktop and we are facing this issue with all the client accessing the VIP.

     

     

  • m_soe's avatar
    m_soe
    Icon for Nimbostratus rankNimbostratus

    You can also approach the issue from the client-side from Layer 7 perspective. Open Developer's tool bar from the web browser. Check Network traces and Console logs while going through 1) F5 virtual, 2) Direct, and compare.

     

    Dev Toolbar:

    Firefox Menu > Web Developer > Network

    Chrome Menu > More Tools > Developer Tools

  • Hi ,

     

    We Check this issue from client side and got the message as below. but this setup is working fine when we bypass the F5 and access the site .

     

    GET https://10.1.221.150/sites/all/themes/bootstrap/css/libs.min.css net::ERR_CONNECTION_RESET 200 (OK)

    (index):117 GET https://10.1.221.150/sites/all/themes/bootstrap/css/rtl.css net::ERR_CONNECTION_RESET 200 (OK)

    (index):468 GET https://10.1.221.150/sites/all/modules/jquery_update/replace/jquery/3.1/jquery.min.js?v=3.1.1 net::ERR_CONNECTION_RESET 200 (OK)

    jquery-extend-3.4.0.js?v=3.1.1:112 Uncaught ReferenceError: jQuery is not defined

      at jquery-extend-3.4.0.js?v=3.1.1:112

    (anonymous) @ jquery-extend-3.4.0.js?v=3.1.1:112

    jquery.once.js?v=1.2:79 Uncaught ReferenceError: jQuery is not defined

      at jquery.once.js?v=1.2:79

    (anonymous) @ jquery.once.js?v=1.2:79

    drupal.js?pv505k:5 Uncaught ReferenceError: jQuery is not defined

      at drupal.js?pv505k:5

    (anonymous) @ drupal.js?pv505k:5

    (index):473 GET https://10.1.221.150/sites/all/themes/bootstrap/js/libs.min.js?pv505k net::ERR_CONNECTION_RESET 200 (OK)

    custom.js?pv505k:154 Uncaught ReferenceError: $ is not defined

      at custom.js?pv505k:154

    (anonymous) @ custom.js?pv505k:154

    theme.init.js?pv505k:51 Uncaught ReferenceError: jQuery is not defined

      at theme.init.js?pv505k:51

    (anonymous) @ theme.init.js?pv505k:51

    (index):478 Uncaught ReferenceError: jQuery is not defined

      at (index):478

    (anonymous) @ (index):478

    (index):282 GET https://10.1.221.150/sites/all/themes/bootstrap/img/bg-hero111.jpg net::ERR_CONNECTION_RESET 200 (OK)

    Sheet1?:embed=y&:showVizHome=no&:host_url=https%3A%2F%2Fpublic.tableau.com%2F&:embed_code_version=3&:tabs=no&:toolbar=yes&:animate_transition=yes&:display_static_image=no&:display_spinner=no&:display_overlay=yes&:display_count=yes&publish=yes&:loadOrderID=1:2 Active resource loading counts reached a per-frame limit while the tab was in background. Network requests will be delayed until a previous loading finishes, or the tab is brought to the foreground. See https://www.chromestatus.com/feature/5527160148197376 for more details

  • JG's avatar
    JG
    Icon for Cumulonimbus rankCumulonimbus

    Packets were being lost/retransmitted between the client and 10.1.221.150. Anything meaningful you can spot in /var/log/ltm ?

     

    What's the config of you VS?

  • VS setup is standard with no SSL Offload and 1 pool member.

     

    There is no log scene on /var/log/ltm, Logs we observed on the packet capture is "TCP zerowindow" message is senting by F5 to Server and "TCP window full" message is sending by Server to F5 then keep-alive message is senting by Server to F5 but F5 is reset the connection after this message. 

  • JG's avatar
    JG
    Icon for Cumulonimbus rankCumulonimbus

    You can change the VS type to "Performance (Layer 4)" and see if that makes a difference.

  • Hi mithuuu85, i'm experimenting the same behavior in client enviroment.

    How you finally resolved this issue!?