504 Gateway Timeout

[THE_BLUE]

I got 504 Gateway Timeout error for 2-3 URLs, but that was also not consistent. so what is the cause of this ?

is it server issue?

[Daniel_Wolf]

Most likely it is a server issue. The BIG-IP will not send HTTP and HTTP response codes in case something is wrong with the backend or with the config.

You can easily take a tcpdump on the BIG-IP and trace under which condition the backend server sends the 504 HTTP status.

[THE_BLUE]

so normally what is the cause of this response code ? does this due to The application takes longer to respond than the configured idle timeout?

So do I have to check anything from server side?

for bigip i will try tcpdump and will check the logs.

Thanks in advance.

[Daniel_Wolf]

504 Gateway Timeout is explained here.

"The HyperText Transfer Protocol (HTTP) 504 Gateway Timeout server error response code indicates that the server, while acting as a gateway or proxy, did not get a response in time from the upstream server that it needed in order to complete the request."

Are you load balancing to some other kind of reverse proxy? Apache, NGINX?

[THE_BLUE]

NO, no extra reverse proxy. only we have bigip