Costin, I will rebuild from HEAD now and give it a try. But I think I may have sorted found the problem. I have changed the Connector timeout to -1 in server.xml, and error 500's is no longer returned. Therefore on this box, mod_jk is too quick for Tomcat (I think). mod_jk tries to connect and fails 3 times (before TC has restarted its Connector threads) and returns an error 500 to the client.
Dave. > -----Original Message----- > From: Costin Manolache [mailto:[EMAIL PROTECTED]] > Sent: 17 February 2003 17:02 > To: [EMAIL PROTECTED] > Subject: Re: mod_jk and Apache timeouts? > > I suspect it's a windows specific return code from recv(). > > The code in question calls socket_recvfull - which in turn calls recv() > to fill a buffer. It handles EAGAIN - but knowing windows, it may be > something else. > > If you can do a checkout from HEAD and built again - you should see > the errno at the end of the message, so we can figure out what happens. > > The first error is the one that matters - the others are just jk doing > a retry. The message is bad - err=0,1,2 should be "retry=0,1,2" > > > > Costin > > > Oxley, David wrote: > > > I have some strange error messages in mod_jk.log that I cannot explain, > > and that I need to resolve urgently. > > > > Server: > > Dual Xeon 2.5Ghz server. > > Windows 2000 Professional SP3 > > Apache 2.0.44 > > Tomcat 4.1.18 > > Mod_jk 1.2.2 > > > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (681)]: ERROR: can't > receive > > the response message from tomcat, network problems or tomcat is down. > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (1050)]: Error reading > reply > > from tomcat. Tomcat is down or network problems. > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (1187)]: ERROR: Receiving > > [from > > tomcat failed, recoverable operation. err=0 > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (681)]: ERROR: can't > receive > > the response message from tomcat, network problems or tomcat is down. > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (1050)]: Error reading > reply > > from tomcat. Tomcat is down or network problems. > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (1187)]: ERROR: Receiving > > [from > > tomcat failed, recoverable operation. err=1 > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (681)]: ERROR: can't > receive > > the response message from tomcat, network problems or tomcat is down. > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (1050)]: Error reading > reply > > from tomcat. Tomcat is down or network problems. > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (1187)]: ERROR: Receiving > > [from > > tomcat failed, recoverable operation. err=2 > > [Mon Feb 17 14:49:38 2003] [jk_ajp_common.c (1198)]: Error connecting > to > > tomcat. Tomcat is probably not started or is listenning on the wrong > port. > > Failed errno = 0 > > > > > > > > The line 'ERROR: Receiving from tomcat failed, recoverable operation. > > err=0' happens all the time but when the above happens i.e. err=0 -> > err=1 > > -> err=2 the browser is returned an error 500. I have a much slower box > > (P4 1.7Ghz) that gets the err=0 line all the time but never gets the > err=1 > > and err=2 lines and therefore never responds with an error 500. > > > > I have a feeling that there is a retry that is happening but the box is > so > > quick the threads on the Tomcat side aren't refreshed before Apache > gives > > up. If this can be fixed by changing the config files then I think this > > should be noted in the docs otherwise this is a bug!?!? > > > > > > > > Here is the relevant parts of the config. > > > > Server.xml: > > > > <Connector className="org.apache.coyote.tomcat4.CoyoteConnector" > > > > port="8009" minProcessors="5" maxProcessors="75" > > > > enableLookups="true" redirectPort="443" > > > > acceptCount="10" debug="0" connectionTimeout="20000" > > > > useURIValidationHack="false" > > > > > > protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/> > > > > workers.properties: > > > > worker.ajp13.port=8009 > > > > worker.ajp13.host=localhost > > > > worker.ajp13.type=ajp13 > > > > worker.ajp13.lbfactor=1 > > > > worker.ajp13.cachesize=10 > > > > worker.ajp13.cache_timeout=600 > > > > > > > > Thanks for your help. > > > > > > > > Dave Oxley > > Development Team Leader > > > > Workplace Systems Plc > > * +44 (0)118 9515 755 > > * <mailto:[EMAIL PROTECTED]> > > [EMAIL PROTECTED] > > * <http://www.workplace-systems.plc.uk/> > > http://www.workplace-systems.plc.uk > > > > > > > > There was once a young man who, in his youth, professed his desire to > > become a great writer. > > When asked to define great, he said, "I want to write stuff that the > whole > > world will read, stuff that people will react to on a truly emotional > > level, stuff that will make them scream, cry, howl in pain and anger!" > > He now works for Microsoft writing error messages. > > > > > > > > Workplace Systems plc, Precedent Drive, Rooksley, Milton Keynes, MK13 > 8PP. > > Registered in England No. 2016236 > > > > Unless expressly stated the views expressed in this email may not be the > > views of Workplace Systems plc and the company, its directors, officers > or > > employees accept no liability for its contents. 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