I got the asynch servlet working with Apache and mod_jk. The issue
turned out to not be with mod_jk. I was deploying to a clustered
environment with two tomcats that were set up to do session replication.
I installed a third lone tomcat, linked it to apache with mod_jk, and it
worked perfectly.
So now I guess my question is somewhat vague, but how would I go about
getting asynchronous servlets to work with clustering enabled? The
isAsyncSupported() method of the request object returns false in my
cluster setup... I've included the cluster element from my server.xml
file. I have this between the <host></host> element.
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelSendOptions="8">
<Manager className="org.apache.catalina.ha.session.DeltaManager"
stateTransferTimeout="10"
expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"/>
<Channel className="org.apache.catalina.tribes.group.GroupChannel">
<Membership
className="org.apache.catalina.tribes.membership.McastService"
address="228.0.0.4"
port="45564"
frequency="500"
dropTime="3000"/>
<Receiver
className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="auto"
port="4000"
autoBind="100"
selectorTimeout="5000"
maxThreads="6"/>
<Sender
className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport
className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
</Sender>
<Interceptor
className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
<Interceptor
className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
</Channel>
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
filter=""/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<ClusterListener
className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
<ClusterListener
className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>
-S
On 6/6/2011 5:21 PM, ma...@apache.org wrote:
Seth Lenzi<le...@jimmy.harvard.edu> wrote:
I'm using Tomcat v7.0.14, Apache v2.2.17, and mod_jk v1.2.30.
The Servlet I have does not implement CometProcessor. It's just a
regular HttpServlet which creates an AsyncContext from the
HttpServletRequest object. Like the example Servlet at this page,
http://developerlife.com/tutorials/?p=1437
It does work nicely when accessed directly from Tomcat on port 8080...
Only throws the IllegalStateExeception when going through Apache +
mod_jk. I'm using the default HTTP connector, no NIO API... Since it
was
working through Tomcat I figured I didn't need the NIO HTTP connector.
Thanks for your reply.
-S
On 6/6/2011 4:49 PM, André Warnier wrote:
Seth Lenzi wrote:
Anyone here have any experience with asynchronous servlets under a
Tomcat that's linked to Apache via mod_jk? I have an asynchronous
servlet that's working nicely when accessed directly from Tomcat,
but,
when I access it by going through Apache and mod_jk the
ServletRequest.startAsync() function call throws an
IllegalStateException saying the feature is not supported.
You do not give a clue about which version of Tomcat you are using,
but
this may provide an explanation :
http://tomcat.apache.org/tomcat-7.0-doc/aio.html
Tomcat 7 has passed the Servlet TCK with all possible combinations of protocol
(HTTP, AJP), connector implementation (BIO, NIO, APR) and httpd module (mod_jk,
mod_proxy_http, mod_proxy_ajp).
Asynchronous servlets work in all combinations.
The best thing to do is create the simplest possible test case (ie a single
Servlet) that demonstrates this issue and attach it to a bugzilla issue.
Mark
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