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Aantat's avatar
Aantat
Icon for Cirrus rankCirrus
Jan 26, 2023
Solved

Losing Requests because of health monitoring

Hi team. I'm facing issue with losing requests because of health monitoring with a simple http application. When we have a unavailable pool member and after few seconds or minutes it becomes availabl...
application delivery
  • Paulius's avatar
    Paulius
    Jan 31, 2023

    Aantat I believe the issue you are experiencing is when your pool member is transitioning from green (healthy) to red (failed). These connections will always drop because the F5 still thinks the device is alive because the health monitor hasn't failed yet but is in the process of failing and I do not believe you can get around this at all other than the connections dropping because the F5 doesn't transition a client from one pool member to another until the health monitor fails completely.

Paulius's avatar
Paulius
Icon for MVP rankMVP
Jan 26, 2023

Aantat Can you go into a bit more depth on when the connections are being lost and share the configuration of the associated virtual servers and pools? Certain types of configuration will not automatically balance your connection to the next pool member without forming that initial connection to the new pool member first which sometimes does appear to be a lost request but most of the time unless a server requires persistence this goes unnoticed to the end user.

  • Aantat's avatar
    Aantat
    Icon for Cirrus rankCirrus
    Jan 31, 2023

    Hi Paulius 

    I'm losing that requests when node is going down. I confgirud "Action on service down" to Reselect, but I'm still losing 2-3 requests which is critical. My goal is IF one of the nodes is going down - requests goes to another node without losing that request. I hope I made it clear. Also there is no persistence