On 28/02/2013 12:03 AM, "Jose María Zaragoza" <demablo...@gmail.com> wrote: > > Hello: > > I'm using a HTTP server Apache/2.2.15 (Unix), as frontend and Tomcat > 6.0.23 as backend server. > Both of them running on the same machine ( Linux CentOS 6.3) > > Apache HTTP listens on 8080 and Tomcat server listens on 8081 > > Apache HTTP server configuration is setted up like > > <VirtualHost *:8080> > ServerAdmin ad...@company.es > DocumentRoot /var/www/html > ServerName www.company.es > ServerAlias company.es > ProxyPass / http://localhost:8081/ > ProxyPassReverse / http://localhost:8081/ > LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" > \"%{User-Agent}i\"" combined > LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b > \"%{Referer}i\" \"%{User-Agent}i\" proxy:%h" proxy > SetEnvIf X-Forwarded-For "^.*\..*\..*\..*" client-ip-request > > CustomLog /var/log/httpd/company-access_log combined env=!client-ip-request > CustomLog /var/log/httpd/company-access_log proxy env=client-ip-request > ErrorLog /var/log/httpd/company-error_log > > </VirtualHost> > > And Tomcat's server.xml configuration file has defined > <!-- Define an AJP 1.3 Connector on port 8009 --> > <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> > > > From time to time, I get this error message in Apache HTTP log files > > [Thu Feb 14 11:11:26 2013] [error] (70007)The timeout specified has > expired: proxy: prefetch request body failed to [::1]:8081 (localhost) > from xx.xx.xx.xx () > > In the Apache HTTP server's access log , I see that > xx.xx.xx.xx - - [14/Feb/2013:11:10:26 +0100] "POST > /mycompany/doMyAction.dwr HTTP/1.1" 400 307 > > (Note: Failed URL is not always the same and former failed URLs don't > always fail ) > > **Look at the time and response error code**: there is an 400 HTTP > response error code ( Bad request ) after 60 seconds ( when "The > timeout specified has expired: proxy: prefetch request body failed" > error is thrown ) > > When this error happens , Tomcat's access logs don't show any access > message, so I guess that the request doesn't arrive to Tomcat server ( > remember , at the same machine) > > > I don't know how I could to debug more . I would like to use tcpdump > but the error occurs randomly and I don't know what parameters to use > with tcpdump . > > Is it a reported bug ? Is there any W/A ? > What could I monitorize/watch ? > > > Thanks and regards You are probably running out of worker threads in tomcat. Tune your tomcat properly so it can handle all the connections coming from apache.
