All, I have a deployment on Windows 2003 Server using Apache 2.2.16, Tomcat 5.5.30 and mod_jk 1.2.31. Apache and Tomcat reside on the same machine. The communication is fine for days / weeks, but at some point all requests to the server (to Apache) that use mod_jk return HTTP 503. The error that shows up in mod_jk.log is: [Mon Feb 20 12:07:01.464 2012] [7280:6912] [error] ajp_send_request::jk_ajp_common.c (1610): (all) failed sending request on a fresh connection (recoverable), socket -1 (errno=54) [Mon Feb 20 12:07:01.464 2012] [7280:6912] [error] ajp_service::jk_ajp_common.c (2562): (all) connecting to tomcat failed.
I've done a packet capture and I see that Apache initiates the 3-way handshake with Tomcat which looks fine and immediately after the connection is established, Tomcat sends a FIN packet to Apache whereby both sides gracefully close the connection. Have any of you encountered this before? Do you have any idea what debug logs I can turn on to get further information without bringing down the server so that we don't loose this situation? Many thanks, Ofer
