I have Apache (2.2.20) in front of a single Tomcat (6.0.32) instance using mod_jk (1.2.31) with the AJP protocol. I am getting errors like the sample below frequently (a few hundred times a day). The server does not have a heavy load, it serves about 150 req/minute and average response time of 200 ms)
[2011-10-12T23:27:00.644-0400] [20239:27] [info] ajp_service::jk_ajp_common.c (2543): (S1) sending request to tomcat failed (unrecoverable), because of client read error (attempt=1) [2011-10-12T23:27:00.654-0400] [20239:27] [info] service::jk_lb_worker.c (1388): service failed, worker S1 is in local error state [2011-10-12T23:27:00.655-0400] [20239:27] [info] service::jk_lb_worker.c (1407): unrecoverable error 400, request failed. Client failed in the middle of request, we can't recover to another instance. [2011-10-12T23:27:00.655-0400] [20239:27] [info] jk_handler::mod_jk.c (2620): Aborting connection for worker=wlb a) Could I get some help to interpret the messages above? b) What is being referred as "Client" ? The client originating the request or does mod_jk calls "Client" my Tomcat instance? (I guess I don't know if mod_jk establishes the connection to Tomcat or if Tomcat is establishing the channel to mod_jk) c) Messages are logged as [info] rather than warning or errors...why? Should I not be concerned about these messages? d) If that is a symptom of a problem, how do I fix it? (In fact, I am being reported that clients of my app are timing out waiting for a response, but my application logs don't have any indication of receiving the request, so I am trying to find out if the message above is an indication that the problem occurs in the Tomcat Connector, and therefor my web app running in Tomcat never got the request at all) Thanks === workers.properties workers.tomcat_home=/opt/greatapp/tomcat workers.java_home=/opt/jdk/jdk6.0 ps=/ worker.list= wlb, jkwatch worker.wlb.type=lb worker.wlb.balance_workers=S1 worker.wlb.max_reply_timeouts=3 worker.jkwatch.type=status worker.jkwatch.read_only=True worker.jkwatch.mount=/private/admin/watch/jk worker.S1.type=ajp13 worker.S1.host=localhost worker.S1.port=6009 worker.S1.lbfactor=1 worker.S1.connection_pool_timeout=600 worker.S1.socket_keepalive=False worker.S1.socket_timeout=15 worker.S1.reply_timeout=300000 worker.S1.recovery_options=27 === uriworkermap.properties /myapp=wlb /myapp/*=wlb /private/admin/watch/jk=jkwatch -Jorge --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
