Troubleshooting steps for Nginx configuration timeout

If keepalive_timeout, client_header_timeout and client_body_timeout are set in Nginx, you can try the following troubleshooting steps:

1. Confirm the effective scope of the configuration

First, confirm whether the definition of these instructions is in the correct context. For example, these directives should be set at the http, server, or location level, and are generally recommended at the http level.

http {
    keepalive_timeout 120s;
    client_header_timeout 120s;
    client_body_timeout 120s;
}

Make sure that these instructions are not overwritten by the same name directives in other configuration files.

2. Check whether there are other related timeout configurations

If there are other timeout configuration parameters, the effectiveness of these instructions may be affected. Here are some other timeout-related configurations to ensure they are free of conflicts or inappropriate settings:

send_timeout: Controls the timeout for Nginx to send a response to the client. Make sure its value is reasonable:

send_timeout 120s;

proxy_connect_timeout: The timeout time is used when connecting to the backend server, suitable for reverse proxy scenarios.

proxy_connect_timeout 120s;

proxy_read_timeoutandproxy_send_timeout: The timeout time used to read or send data from the backend server.

proxy_read_timeout 120s;
proxy_send_timeout 120s;

These settings areclient_*_timeoutTogether determines the timeout time to ensure that there is no timeout setting that conflicts with each other.

3. Confirm the configuration to take effect

After each configuration file is modified, remember to test whether the syntax of the configuration file is correct:

sudo nginx -t

And reload Nginx:

sudo systemctl reload nginx

4. Check if there are any other modules that affect it

Some specific modules (such asproxy_passorfastcgi_pass) The respective timeout settings may be used. For example, if you useproxy_passPerform reverse proxy to ensureproxy_*_timeoutThe settings are correct and are suitable for scenarios where proxy requests are performed.

location / {
    proxy_pass http://backend;
    proxy_connect_timeout 120s;
    proxy_read_timeout 120s;
    proxy_send_timeout 120s;
}

If usedfastcgi_pass, it needs to be checked accordinglyfastcgi_*_timeoutset up.

5. Confirm log

Check Nginx's error log (usually located at/var/log/nginx/) to see if there are related timeouts or configuration issues.

sudo tail -f /var/log/nginx/

There may be prompts about timeouts in the log to help you further determine the problem.

6. Other factors that may affect

Load Balancer/Proxy: If there are other load balancers, reverse proxy, or firewall in front of them, their timeout settings will also affect the overall request timeout. The configuration of the relevant equipment needs to be checked.
Client: Sometimes the client's behavior may also cause timeout. For example, there is a problem with the client's active disconnection or initiated request, resulting in a timeout.

Summarize

Check that the configuration is set in the correct context.
Make sure there are no other timeout-related command conflicts.
Make sure to reload the configuration after each modification and test if it is correct.
Check the error log for more timeout information.

After trying these steps, if they still fail to take effect, you can share more detailed configuration or error logs for further analysis.

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