2010/11/8 Rainer Jung <rainer.j...@kippdata.de>: > A typical annoyance when combining Apache web server and Tomcat is the > difference in access log timestamp. Apache logs the beginning of the > request, Tomcat logs the end of the request. >
According to the HTTPD docs [2], this changed between HTTPD 1.3 and 2. 1.3 logs the time when the request processing finished, 2+ logs when it started. [2] http://httpd.apache.org/docs/1.3/logs.html > I added a feature to Apache trunk (will become 2.4) to make it configurable > for Apache, which time stamp to choose ([1]). Furthermore the Apache web > server allows to choose the format, in which the time stamp is being logged > as something different than just "Common Log Format". This is all configured > by an appropriate "format" in %{format}t. > > Any a priori objections about porting the same functionality to Tomcat > trunk? > I thought about it already. I would like this feature. My current idea with implementation is that the timestamp when request processing started can be placed in a field in the request. Such solution will be compatible with the recently added AccessLog interface. There might be a caveat with caching of formatted timestamp strings in the access log valve implementations. What happens with async requests? > Of course due to latency between Apache and Tomcat and due to different > timeouts, even when using the same time stamp (begin or end of request) in > both products, the timestamps will not always match exactly. But at the > moment matching the entries is much harder, than it could be. > If one needs to match them it would be better to do so by certain id, not by a timestamp. Something like %{forensic-id}n [3] [3] http://httpd.apache.org/docs/current/mod/mod_log_forensic.html > Regards, > > Rainer > > [1] http://httpd.apache.org/docs/trunk/mod/mod_log_config.html#formats > Best regards, Konstantin Kolinko --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org
