On 8 September 2010 06:58, Viktor Klang <
viktor.klang@xxxxxxxxx> wrote:
> Hey guys,
>
> I'm having a situation where requests to a servlet seem to be run in serial
> instead of in parallel.
> I have done quite a lot of debugging and the problem seems to be inside
> Jetty, so I thought I'd ask you under what conditions access to a servlet
> would become serialized.
>
> (access to different services at the same time (parallel) works, but not
> same service in parallel)
>
> Setup:
> Jetty 7.14
> Jersey 1.2
>
> I'm having an RS-bean defined like this:
>
> @Path("/scalacount")
> class SimpleService {
> @GET
> @Produces(Array("text/html"))
> def count = {
> Logger("SimpleService").error("Before Sleep")
> Thread.sleep(10000)
> Logger("SimpleService").error("After Sleep")
> "someresult"
> }
> }
>
> The problem is that when I request http://mycomputer:myport/scalacount
> from two tabs at the same time, I get an output that looks like this:
>
> [ERROR] [2010-09-07 22:46:27,207] [qtp1568367177-85 - /scalacount]
> SimpleService: Before Sleep
> [ERROR] [2010-09-07 22:46:37,208] [qtp1568367177-85 - /scalacount]
> SimpleService: After Sleep
> [DEBUG] [2010-09-07 22:46:37,437] [qtp1568367177-85 - /scalacount]
> o.e.j.u.log: RESPONSE /scalacount 200
> [DEBUG] [2010-09-07 22:46:37,510] [qtp1568367177-82 - /scalacount]
> o.e.j.u.log: REQUEST /scalacount on
> org.eclipse.jetty.server.nio.SelectChannelConnector$2@5805dc52
> [DEBUG] [2010-09-07 22:46:37,510] [qtp1568367177-82 - /scalacount]
> o.e.j.u.log: servlet=se.scalablesolutions.akka.comet.AkkaServlet-868246527
> [DEBUG] [2010-09-07 22:46:37,511] [qtp1568367177-82 - /scalacount]
> o.e.j.u.log: servlet holder=
> [DEBUG] [2010-09-07 22:46:37,511] [qtp1568367177-82 - /scalacount]
> o.e.j.u.log: chain=
> [ERROR] [2010-09-07 22:46:37,512] [qtp1568367177-82 - /scalacount]
> SimpleService: Before Sleep
> [ERROR] [2010-09-07 22:46:47,512] [qtp1568367177-82 - /scalacount]
> SimpleService: After Sleep
> [DEBUG] [2010-09-07 22:46:47,514] [qtp1568367177-82 - /scalacount]
> o.e.j.u.log: RESPONSE /scalacount 200
>
>
> I.e. instead of being run in parallel they are run after eachother, which
> they, to my knowledge should now.
>
> I'm including my jetty config file:
>
> <?xml version="1.0"?>
> <!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN"
> "
http://www.eclipse.org/jetty/configure.dtd">
>
> <!-- =============================================================== -->
> <!-- Configure the Jetty Server -->
> <!-- -->
> <!-- Documentation of this file format can be found at: -->
> <!--
http://wiki.eclipse.org/Jetty/Reference/jetty.xml_syntax -->
> <!-- -->
> <!-- Additional configuration files are available in $JETTY_HOME/etc -->
> <!-- and can be mixed in. For example: -->
> <!-- java -jar start.jar etc/jetty.xml etc/jetty-ssl.xml -->
> <!-- -->
> <!-- See start.ini file for the default configuraton files -->
> <!-- =============================================================== -->
>
>
> <Configure id="Server" class="org.eclipse.jetty.server.Server">
>
> <!-- =========================================================== -->
> <!-- Server Thread Pool -->
> <!-- =========================================================== -->
> <Set name="ThreadPool">
> <New class="org.eclipse.jetty.util.thread.ExecutorThreadPool">
> </New>
> </Set>
>
> <!-- =========================================================== -->
> <!-- Set connectors -->
> <!-- =========================================================== -->
>
> <Call name="addConnector">
> <Arg>
> <New class="org.eclipse.jetty.server.nio.SelectChannelConnector">
> <Set name="host"><SystemProperty name="jetty.host" /></Set>
> <Set name="port"><SystemProperty name="jetty.port"
> default="8080"/></Set>
> <Set name="maxIdleTime">300000</Set>
> <Set name="Acceptors">2</Set>
> <Set name="statsOn">false</Set>
> <Set name="confidentialPort">8443</Set>
> <Set name="lowResourcesConnections">20000</Set>
> <Set name="lowResourcesMaxIdleTime">5000</Set>
> </New>
> </Arg>
> </Call>
>
> <!-- Uncomment this and enter your SSL config/credentials to enable
> https
> <Call name="addConnector">
> <Arg>
> <New class="org.eclipse.jetty.server.ssl.SslSelectChannelConnector">
> <Set name="Port">8443</Set>
> <Set name="maxIdleTime">30000</Set>
> <Set name="Acceptors">2</Set>
> <Set name="AcceptQueueSize">100</Set>
> <Set name="Keystore"><SystemProperty name="jetty.home" default="."
> />/etc/keystore</Set>
> <Set name="Password">PASSWORD</Set>
> <Set name="KeyPassword">KEYPASSWORD</Set>
> <Set name="truststore"><SystemProperty name="jetty.home"
> default="." />/etc/keystore</Set>
> <Set name="trustPassword">TRUSTPASSWORD</Set>
> </New>
> </Arg>
> </Call>
> -->
>
> <!-- =========================================================== -->
> <!-- Set handler Collection Structure -->
> <!-- =========================================================== -->
> <Set name="handler">
> <New id="Handlers"
> class="org.eclipse.jetty.server.handler.HandlerCollection">
> <Set name="handlers">
> <Array type="org.eclipse.jetty.server.Handler">
> <Item>
> <New id="AkkaRestHandler"
> class="org.eclipse.jetty.servlet.ServletContextHandler">
> <Set name="contextPath">/</Set>
> <Call name="addServlet">
> <Arg>se.scalablesolutions.akka.comet.AkkaServlet</Arg> <!--
> BASICALLY A PIMPED Jersey ServletContainer -->
> <Arg>/*</Arg>
> </Call>
> </New>
> </Item>
> <Item>
> <New id="DefaultHandler"
> class="org.eclipse.jetty.server.handler.DefaultHandler"/>
> </Item>
> </Array>
> </Set>
> </New>
> </Set>
>
> <!-- =========================================================== -->
> <!-- extra options -->
> <!-- =========================================================== -->
> <Set name="stopAtShutdown">true</Set>
> <Set name="sendServerVersion">true</Set>
> <Set name="sendDateHeader">true</Set>
> <Set name="gracefulShutdown">1000</Set>
>
> </Configure>
>
>
>
> --
> Viktor Klang,
> Code Connoisseur
> Work:
www.akkasource.com
> Code:
github.com/viktorklang
> Follow:
twitter.com/viktorklang
> Read:
klangism.tumblr.com
>
>
