If a backend server crashes while handling a response, what does the client see?

Question

If a backend server crashes while handling a response, what does the client see? The specific case I'm thinking of is when an API call causes X server to crash.&nbsp; So API call from outside hits the F5, F5 passes the call along to X server, X server crashes before sending a response back to the F5. Does the F5 just drop the connection (TCP RST), or does it send a valid HTTP response with like status code 500?

jrahm · Answer

Juergen_Mang's answer is a possible action, but not the only possibility. What happens is dependent on how your action on service down in your pool is configured. Read Deb's article here for details.

juergen_mang · Answer

F5 LTM sends a TPC RST: https://support.f5.com/csp/article/K9812

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If a backend server crashes while handling a response, what does the client see?

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