We've also seen this, and tracked it down to two problems. 1 When the database back end goes 100% busy. The fix for us was to sort the dodgy SQL
2 We ran out of bandwidth. Fix was to buy more :) Sorry, hope that helps Lee On Mon, 8 Sep 2003, Nicholas Ide wrote: > > Is there no wisdom out there on this topic? > I'm really stumped and would appreciate some insight. > > -Nick > > > > > > >I have tomcat 4.1.27 front ended by apache 2.0.47 and mod_jk connector. > > > >Occasionally I run out of apache slots because all the slots are > >apparently hung while Sending Reply. (W status from serverstatus screen). > >These connections appear to all be stuck in a dialog with tomcat. > >If I restart tomcat then apache cleans up the slots. > > > >I cannot reproduce the problem myself. I simply have to wait long > >enough, perhaps 48 hours, for the planets to align and cause the problem. > >I am unable to detect a pattern for the failures. > >They also happened under tomcat 4.0.4 and apache 1.3.26. > > > >Is there a configuration parameter on *either* the apache or tomcat > >side which will REALLY time out such hanging connections? > >The "connectionTimeout" parameter in the Connector apparently > >does not do the trick. Nor does the soTimeout or serverTimeout > >parameters found in jk2.properties. > > > >Snippet from server.xml: > > > > <Connector className="org.apache.coyote.tomcat4.CoyoteConnector" > > port="@CATALINA_AJP_PORT@" minProcessors="10" > > maxProcessors="85" > > enableLookups="false" redirectPort="8443" > > acceptCount="10" debug="0" > > connectionTimeout="10000" > > useURIValidationHack="false" > > protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/> > > > >jk2.properties: > > > > [EMAIL PROTECTED]@ > > channelSocket.scheme=http > > channelSocket.soTimeout=50000 > > > >Configuration: > > CoyoteConnector with JkCoyoteHandler > > Catalina 4.1.27-LD-jdk14 > > Apache/2.0.47 (Unix) mod_jk/1.2.1 > > SunOS 5.8 > > > > > >-Nick > > > > > >--------------------------------------------------------------------- > >To unsubscribe, e-mail: [EMAIL PROTECTED] > >For additional commands, e-mail: [EMAIL PROTECTED] > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
