tomcat-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Oxley, David" <David.Ox...@workplace-systems.plc.uk>
Subject RE: mod_jk and Apache timeouts?
Date Mon, 17 Feb 2003 17:00:29 GMT
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:cmanolache@yahoo.com]
> Sent: 17 February 2003 17:02
> To: tomcat-dev@jakarta.apache.org
> 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:david.oxley@workplace-systems.plc.uk>
> > david.oxley@workplace-systems.plc.uk
> > *  <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. Unless expressly stated
> no
> > contracts may be concluded on behalf of Workplace Systems plc by means
> of
> > e-mail communication.
> >
> > This e-mail, and any attachments are strictly confidential and intended
> > for the addressee(s) only. If they have come to you in error you must
> take
> > no action based on the contents, nor may you copy or show them to
> anyone.
> > Please notify the sender of the error by return email. Please ensure you
> > have adequate virus protection before you open or detach any documents
> > from this transmission. Workplace Systems plc does not accept any
> > liability for viruses.
> >
> >
> >
> >
> >
> > ________________________________________________________________________
> > This e-mail has been scanned for all viruses by Star Internet. The
> > service is powered by MessageLabs. For more information on a proactive
> > anti-virus service working around the clock, around the globe, visit:
> > http://www.star.net.uk
> > ________________________________________________________________________
> 
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tomcat-dev-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tomcat-dev-help@jakarta.apache.org
> 
> 
> ________________________________________________________________________
> This e-mail has been scanned for all viruses by Star Internet. The
> service is powered by MessageLabs. For more information on a proactive
> anti-virus service working around the clock, around the globe, visit:
> http://www.star.net.uk
> ________________________________________________________________________


________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________
Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message