memcached session manager and jboss

[bone]

From what I'v read the JBoss6 JBossWeb is based on TomCat6 but it looks a bit different.

I'd like to use the memcached session manager, is there a way to set it up?

http://code.google.com/p/memcached-session-manager/wiki/SetupAndConfiguration

I'm still learning jboss, would be nice if there is a solution without changing a lot of code

[martin.grotzke]

As you want to modify tomcats context.xml to configure msm the first question is which one is relevant to you / where to find it.

Cheers,

Martin

[bone]

I'm want to set up a small test like the example on your msm-site (2 server, 2 memcache)

what I've done so far:

-copied default

-added this to deploy\jbossweb.sar\context.xml

{code:xml}
    <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
    memcachedNodes="n1:localhost:11211 n2:localhost:11212"
    failoverNodes="n1"
    requestUriIgnorePattern=".*\.(png|gif|jpg|css|js)$"
    transcoderFactoryClass="de.javakaffee.web.msm.JavaSerializationTranscoderFactory"
    />
{code}

-added to lib folder

tomcat-juli.jar (it was missing, don't know why)

memcached-session-manager-1.4.0.jar

memcached-2.5.jar

when I'm trying to start it now, I'm getting:

10:17:42,539 INFO  [TomcatDeployment] deploy, ctxPath=/invoker

10:17:42,836 ERROR [StandardContext] Context [/invoker] startup failed due to previous errors: java.lang.NoSuchFieldError: log

    at de.javakaffee.web.msm.MemcachedBackupSessionManager.start(MemcachedBackupSessionManager.java:1421) [:]

    at org.apache.catalina.core.StandardContext.start(StandardContext.java:3837) [:6.0.0.Final]

[jfclere]

They used log instead _log in the init() code... Complain to them

[martin.grotzke]

Hi David,

I'm the creator of memcached-session-manager and would like to help in bringing msm and jboss together.

As I'm new to jboss it would be helpful if you could provide a step by step guide how to reproduce it. Starting with the jboss version to download, which files to copy from directory X to directory Z (you copied "default" from where to where?), and also how you're running it.

Otherwise it would take too much time for me and I might do different things than you.

Cheers,

Martin

[martin.grotzke]

Hi JF,

the field log is defined by tomcats ManagerBase which is extended by MemcachedBackupSessionManager. You're right that the inconsistency of log and _log could be fixed. Still, in a normal tomcat installation it does work (as expected), so I wonder what's different in the tomcat bundled with jboss.

Do you have a clue what's wrong here? Can you tell which tomcat version comes with jboss 6?

Cheers,

Martin

[martin.grotzke]

Hi David,

I just changed the log stuff to _log, you can get the jar here:

http://dl.dropbox.com/u/1439289/memcached-session-manager-1.4.2-SNAPSHOT.jar

Perhaps this already does the trick.

Cheers,

Martin

[jfclere]

Do you have a clue what's wrong here? Can you tell which tomcat version comes with jboss 6?

Jboss uses org.jboss.logging.Logger and not org.apache.juli.logging.Log that is why you get the error.

I think to make a jbossweb version you should just add the dependencies to jbossweb and jbosslogging and rebuild your package.

[bone]

Hi Martin,

this really did the trick, the server is now running and connected to two memcache servers. Now I only have to write a quick tes programm. I'm going to post a quick guide here as soon as it is working.

Thanks

David

[martin.grotzke]

Jean-Frederic Clere wrote:

Jboss uses org.jboss.logging.Logger and not org.apache.juli.logging.Log that is why you get the error.

I think to make a jbossweb version you should just add the dependencies to jbossweb and jbosslogging and rebuild your package.

Ok, so jboss does not "bundle" tomcat as-is, but comes with a modified tomcat? Are other things changed besides logging? Is there any patch I can have a look at, or how are the tomcat sources modified?

Cheers,

Martin

[martin.grotzke]

this really did the trick, the server is now running and connected to two memcache servers. Now I only have to write a quick tes programm. I'm going to post a quick guide here as soon as it is working.

Great!

Are you interested in a msm version for jbossweb, that can be used out-of-the-box (as JF suggested)?

I'm already working on a new project structure of msm that allows to create a jbossweb version without too much effort.

Cheers,

Martin

[jfclere]

Ok, so jboss does not "bundle" tomcat as-is, but comes with a modified tomcat? Are other things changed besides logging? Is there any patch I can have a look at, or how are the tomcat sources modified?

It is a forked version of Tomcat. The repository is http://anonsvn.jboss.org/repos/jbossweb/

[martin.grotzke]

It is a forked version of Tomcat. The repository is http://anonsvn.jboss.org/repos/jbossweb/

Thanx, I'll have a look at it and see if I can create a jboss version of msm.

Cheers,

Martin

[bone]

Hi again,

I've written a very small servlet, packed it into a war and deployed it.

{code}
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public final class SessionTest extends HttpServlet {
    private static final long serialVersionUID = 1L;
    public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        HttpSession session = request.getSession(false);
        PrintWriter out = response.getWriter();
        if (session != null) {
            Integer rnd = (Integer) session.getAttribute("random");
            System.out.println("session found " + session.getId() + " load random=" + rnd);
            out.write("session found " + session.getId() + " load random=" + rnd);
        }
        else {
            int rnd = (int) (Math.random() * 100);
            session = request.getSession(true);
            session.setAttribute("random", Integer.valueOf(rnd));
            System.out.println("no session found, new " + session.getId() + "created and " + rnd + " saved");
            out.write("no session found, new " + session.getId() + "created and " + rnd + " saved");
        }
    }
    public void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        doPost(request, response);
    }
}
{code}

when I use call http://127.0.0.1:8080/sessiontest/test.html now, I'm getting:

{code}
15:28:35,745 ERROR [org.apache.catalina.connector.CoyoteAdapter] An exception or error occurred in the container during the request processi
ng: java.lang.NoSuchFieldError: thisAccessedTime
        at de.javakaffee.web.msm.MemcachedBackupSession.wasAccessedSinceLastBackupCheck(MemcachedBackupSession.java:311) [:]
        at de.javakaffee.web.msm.BackupSessionService.backupSession(BackupSessionService.java:189) [:]
        at de.javakaffee.web.msm.MemcachedBackupSessionManager.backupSession(MemcachedBackupSessionManager.java:896) [:]
        at de.javakaffee.web.msm.SessionTrackerValve.backupSession(SessionTrackerValve.java:238) [:]
        at de.javakaffee.web.msm.SessionTrackerValve.invoke(SessionTrackerValve.java:149) [:]
        at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.event(CatalinaContext.java:285) [:1.1.0.Final]
        at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.invoke(CatalinaContext.java:261) [:1.1.0.Final]
        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:88) [:6.0.0.Final]
        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:100) [:6.0.0.Final]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) [:6.0.0.Final]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [:6.0.0.Final]
        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) [:6.0.0.Final]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [:6.0.0.Final]
        at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:53) [:6.0.0.Fina
l]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [:6.0.0.Final]
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [:6.0.0.Final]
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:654) [:6.0.0.Final]
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951) [:6.0.0.Final]
        at java.lang.Thread.run(Thread.java:662) [:1.6.0_23]
15:28:39,844 ERROR [org.apache.catalina.core.ContainerBase] Exception invoking periodic operation: : java.lang.NoSuchFieldError: thisAccesse
dTime
        at de.javakaffee.web.msm.MemcachedBackupSession.wasAccessedSinceLastBackup(MemcachedBackupSession.java:289) [:]
        at de.javakaffee.web.msm.MemcachedBackupSessionManager.updateExpirationInMemcached(MemcachedBackupSessionManager.java:1597) [:]
        at de.javakaffee.web.msm.MemcachedBackupSessionManager.backgroundProcess(MemcachedBackupSessionManager.java:1574) [:]
        at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1314) [:6.0.0.Final]
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1599) [:6.0.0.Final]
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1608) [:6.0.0.Final]
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1608) [:6.0.0.Final]
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1588) [:6.0.0.Final]
        at java.lang.Thread.run(Thread.java:662) [:1.6.0_23]
{code}

I've attached the war file.

[martin.grotzke]

I think to make a jbossweb version you should just add the dependencies to jbossweb and jbosslogging and rebuild your package.

I don't find a jbossweb 6.x artifact, only some 3.x (jboss.web.jbossweb) or 7.x (org.jboss.web), using the nexus search.

Can you point me to the dependency spec (groupId:artifactId:version) and a repository that I need to include for jboss6 jbossweb?

Thanx && cheers,

Martin