Apache 2.4.54 - Slow Response Times with Proxy Pass and Backend Service
I'm collaborating on a project where I've searched everywhere and can't find a clear answer. I'm working on a personal project and I'm sure I'm missing something obvious here, but I'm experiencing important latency when using the `ProxyPass` directive to forward requests to a backend service in Apache 2.4.54... The request to the backend service can take up to 10 seconds to respond, but when I hit the backend service directly, it responds in under 200ms. I've already checked the network latency and ruled it out as an scenario. In my `httpd.conf`, I have the following configuration: ```apache ProxyPass /api http://localhost:5000/api ProxyPassReverse /api http://localhost:5000/api <Proxy *> Order deny,allow Allow from all </Proxy> ``` I also ensured that the backend service is running optimally, but the delay continues only when going through Apache. I've enabled logging for both Apache and my backend service. The Apache logs show a delay in the request processing: ``` [Fri Oct 01 12:00:00.000000 2023] [proxy:debug] [pid 1234:tid 140569123456000] proxy_util.c(2166): [client 192.168.1.1:12345] [backend] is not available [Fri Oct 01 12:00:00.000000 2023] [proxy:debug] [pid 1234:tid 140569123456000] proxy_util.c(2203): [client 192.168.1.1:12345] proxy: connecting to backend http://localhost:5000/api ``` I tried tweaking the `ProxyTimeout` setting but increasing it didn't improve the response time, and setting it lower produced a timeout behavior. Also, enabling `mod_status` shows that Apache is not overloaded; the server load is quite low. I’ve considered adding caching but I want to understand the root cause first. Has anyone encountered similar issues, or can anyone suggest additional debugging steps or configurations that might help pinpoint the question? I'm working on a CLI tool that needs to handle this. I'm working on a API that needs to handle this. What's the best practice here? This issue appeared after updating to Apache stable. Thanks for any help you can provide!