We've been trying to track down network related problems on our end, and
found that pound is not logging information fully on errors. For
example, if pound, after selecting a backend from a service pool, has
trouble communicating with the backend, the request is not logged
anywhere, except as LOG_NOTICE or LOG_WARNING -- which is the correct
behavior, if you want to separate informational messages from errors.
The problem, at least for us, is that on an error, pound only logs the
error condition it encountered (Connnection timed out, error flush
headers, etc.), but not the request from the user. This presents 2
problems:
1. We don't know what the user was requesting, when the error occurred.
2. Our combined logs on our backends contain more responses than the
information logged in LOG_INFO -- this happens when pound received a
requests from the client, sends it to the backend, but encounters a
problems on receiving a response from backend. Pound will log the error
in LOG_NOTICE, but the backend logs the response as successful.
I would like to see pound log more information on an error: the client
IP address, backend IP address (if available), request URI (basically
LOG_LEVEL=2 information). Looking at the code, pound only logs such
information only in handful conditions. I'd like the information logged
in all conditions after it has successfully received a request header
from the client. Any thoughts, comments?
On a related note, I found couple of minor issues when looking at our
error logs:
In v2.3.x, pound, when it has problems reading response from the
backend, logs something like this:
Aug 17 18:21:57 rp2 pound: (b57cfba0) line too long: ....
Aug 17 18:21:57 rp2 pound: (b57cfba0) e500 can't read header
Aug 17 18:21:57 rp2 pound: (b57cfba0) e500 response error read from
10.10.1.134:80/GET /industry-snapshot/Transportation HTTP/1.0: Success
(2.759 secs)
Obviously, these are multiple errors caused by a long line. I'm not
sure if anything can (should) be done, so it doesn't have "Success" as
the error string.
In another instance, I have lines such as:
Aug 20 09:53:27 rp2 pound: (b7254ba0) e500 error copy client cont to
10.10.1.134:80/POST /industry HTTP/1.1: Success (0.007 sec)
but this is not preceded by any other error messages.
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