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Date: Tue, 9 Dec 2014 01:52:25 +0530
Message-ID: 
 <CAP6Mh-PFx+m8e8t7SMD=J2MtCb4RtgcpdqUE0y7_s+eWK_ceMA@mail.gmail.com>
Subject: Re: Tomcat cluster with static membership
From: Ameer Mawia <ameer.mawia@gmail.com>
To: Tomcat Users List <users@tomcat.apache.org>
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Hi Theo,

Since you are using static membership and NOT dynamic(multi-cast) which
auto-detect members, my current understanding says that you will have to
add entry of all the members of your cluster in each of nodes server.xml.
Example:

My cluster has two nodes. So to configure these I had add these two members
entries in both node's server.xml(since running on the same machine, they
have varying port with same ip):

      <Interceptor
className=3D"org.apache.catalina.tribes.group.interceptors.StaticMembership=
Interceptor">
        <Member
className=3D"org.apache.catalina.tribes.membership.StaticMember"
        port=3D"4000"
        host=3D"192.168.1.6"
        uniqueId=3D"{10,1,0,100,0,0,0,0,0,0,0,0,0,0,0,0}"/>

        <Member
className=3D"org.apache.catalina.tribes.membership.StaticMember"
        port=3D"4001"
        host=3D"192.168.1.6"
        uniqueId=3D"{10,1,0,101,0,0,0,0,0,0,0,0,0,0,0,0}"/>

Regards,
Ameer Mawia


On Mon, Dec 8, 2014 at 8:26 PM, Th=C3=A9o Chamley <theo.ch@mley.fr> wrote:

> Hello,
>
> I am trying to setup a simple Tomcat cluster with static membership. I
> can't use multicast because I am on a virtualization environment that doe=
s
> not allow it.
>
> Debian 7
> Tomcat 8.0.14
> Oracle JVM 1.8.0_25
>
> Both Tomcat are ok on their own, but I can't seem to make the clustering
> work: the sessions are not replicated from one to another.
> Following the official documentation, I wrote this configuration :
>
> <Engine name=3D"Catalina" defaultHost=3D"localhost">
>         <Cluster className=3D"org.apache.catalina.ha.tcp.SimpleTcpCluster=
">
>             <Manager className=3D"org.apache.catalina.ha.session.
> BackupManager"
>                    expireSessionsOnShutdown=3D"false"
>                    notifyListenersOnReplication=3D"true"
>                    mapSendOptions=3D"6"/>
>             <Channel className=3D"org.apache.catalina.tribes.group.
> GroupChannel">
>                <Receiver className=3D"org.apache.
> catalina.tribes.transport.nio.NioReceiver"
>                       address=3D"0.0.0.0"
>                       port=3D"4110"
>                       selectorTimeout=3D"100"
>                       maxThreads=3D"6"/>
>
>                <Interceptor className=3D"org.apache.catalina.tribes.group=
.
> interceptors.StaticMembershipInterceptor">
>                       <Member className=3D"org.apache.
> catalina.tribes.membership.StaticMember"
>                       port=3D"4110"
>                       host=3D"my.server.1"
>                       domain=3D"staging-cluster"
>                       uniqueId=3D"{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,0}=
"/>
>                </Interceptor>
>
>                <Sender className=3D"org.apache.catalina.tribes.transport.
> ReplicationTransmitter">
>                   <Transport className=3D"org.apache.
> catalina.tribes.transport.nio.PooledParallelSender"/>
>                </Sender>
>                <Interceptor className=3D"org.apache.catalina.tribes.group=
.
> interceptors.TcpFailureDetector"/>
>                <Interceptor className=3D"org.apache.catalina.tribes.group=
.
> interceptors.MessageDispatch15Interceptor"/>
>                <Interceptor className=3D"org.apache.catalina.tribes.group=
.
> interceptors.ThroughputInterceptor"/>
>            </Channel>
>            <Valve className=3D"org.apache.catalina.ha.tcp.ReplicationValv=
e"
>                 filter=3D".*\.gif|.*\.js|.*\.jpeg|.*\.jpg|.*\.png|.*\.css=
|.
> *\.txt"/>
>            <ClusterListener className=3D"org.apache.catalina.ha.session.
> ClusterSessionListener"/>
>         </Cluster>
> [...]
> </Engine>
>
> Note: I changed the host and uniqId on the StaticMembershipInterceptor on
> the other Tomcat.
>
> This is not a network problem as I can telnet into the 4110 port from one
> server to another.
> Also, by running a tcpdump, I can't see any trafic between the two server=
s.
>
> The Tomcats seem to be doing something, because I have the following in m=
y
> catalina.out:
>
> ******
> 08-Dec-2014 15:38:15.309 INFO [main] org.apache.catalina.ha.tcp.SimpleTcp=
Cluster.startInternal
> Cluster is about to start
> 08-Dec-2014 15:38:15.312 INFO [main] org.apache.catalina.tribes.transport=
.ReceiverBase.bind
> Receiver Server Socket bound to:/0.0.0.0:4110
> 08-Dec-2014 15:38:15.328 INFO [Thread-5] org.apache.catalina.ha.tcp.Simpl=
eTcpCluster.memberAdded
> Replication member added:org.apache.catalina.tribes.membership.
> StaticMember[t
> cp://my.server.1:4110,my.server.1,4110, alive=3D0, securePort=3D-1, UDP
> Port=3D-1, id=3D{1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 }, payload=3D{},
> command=3D{}, domain=3D{115 116 97
>  103 105 110 103 45 99 ...(15)}, ]
> 08-Dec-2014 15:38:15.330 INFO [main] org.apache.catalina.tribes.
> membership.McastServiceImpl.setupSocket Setting cluster mcast soTimeout
> to 500
> 08-Dec-2014 15:38:15.332 INFO [main] org.apache.catalina.tribes.
> membership.McastServiceImpl.waitForMembers Sleeping for 1000 milliseconds
> to establish cluster membership, sta
> rt level:4
> 08-Dec-2014 15:38:16.155 INFO [Membership-MemberAdded.]
> org.apache.catalina.ha.tcp.SimpleTcpCluster.memberAdded Replication
> member added:org.apache.catalina.tribes.membership
> .MemberImpl[tcp://{0, 0, 0, 0}:4110,{0, 0, 0, 0},4110, alive=3D1277686,
> securePort=3D-1, UDP Port=3D-1, id=3D{-22 -45 110 -29 21 -22 75 95 -103 8=
6 95
> -119 15 48 -17 -27 }, payload=3D{}
> , command=3D{}, domain=3D{}, ]
> 08-Dec-2014 15:38:16.259 INFO [Tribes-Task-Receiver-1]
> org.apache.catalina.tribes.io.BufferPool.getBufferPool Created a buffer
> pool with max size:104857600 bytes of type: org.apache.catalina.tribes.io=
.
> BufferPool15Impl
> 08-Dec-2014 15:38:16.332 INFO [main] org.apache.catalina.tribes.
> membership.McastServiceImpl.waitForMembers Done sleeping, membership
> established, start level:4
> 08-Dec-2014 15:38:16.335 INFO [main] org.apache.catalina.tribes.
> membership.McastServiceImpl.waitForMembers Sleeping for 1000 milliseconds
> to establish cluster membership, start level:8
> 08-Dec-2014 15:38:17.335 INFO [main] org.apache.catalina.tribes.
> membership.McastServiceImpl.waitForMembers Done sleeping, membership
> established, start level:8
> ******
>
> Could someone, please, help me finding what I am doing wrong?
>
> Thanks,
>
> Th=C3=A9o C.
>
>
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