How do I avoid "already used by another worker" warning in an Apache2 reverse proxy config?

Solution 1:

I realize this is an old post, but since it came up in a google search I was doing I figured I'd post some helpful information I found regarding this same error.

In some cases this error message is benign. For example, I was getting it in CentOS 5 but by proxy config was perfectly legitimate and worked just fine. You can view the discussion regarding this issue here: https://issues.apache.org/bugzilla/show_bug.cgi?id=44350

and note that the suggestion to move this to a "debug" level error instead of a "warn" level error has been implemented in newer versions of mod_proxy: https://issues.apache.org/bugzilla/show_bug.cgi?id=48947

Hope this helps anyone also searching for this error on the internet!

Solution 2:

As you discovered, you need to specify the more specific matches first.