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
does 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="Catalina" defaultHost="localhost">
<Cluster
className="org.apache.catalina.ha.tcp.SimpleTcpCluster">
<Manager
className="org.apache.catalina.ha.session.BackupManager"
expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"
mapSendOptions="6"/>
<Channel
className="org.apache.catalina.tribes.group.GroupChannel">
<Receiver
className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="0.0.0.0"
port="4110"
selectorTimeout="100"
maxThreads="6"/>
<Interceptor
className="org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor">
<Member
className="org.apache.catalina.tribes.membership.StaticMember"
port="4110"
host="my.server.1"
domain="staging-cluster"
uniqueId="{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,0}"/>
</Interceptor>
<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"/>
<Interceptor
className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>
</Channel>
<Valve
className="org.apache.catalina.ha.tcp.ReplicationValve"
filter=".*\.gif|.*\.js|.*\.jpeg|.*\.jpg|.*\.png|.*\.css|.*\.txt"/>
<ClusterListener
className="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
servers.
The Tomcats seem to be doing something, because I have the following in
my catalina.out:
******
08-Dec-2014 15:38:15.309 INFO [main]
org.apache.catalina.ha.tcp.SimpleTcpCluster.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.SimpleTcpCluster.memberAdded Replication
member added:org.apache.catalina.tribes.membership.StaticMember[t
cp://my.server.1:4110,my.server.1,4110, alive=0, securePort=-1, UDP
Port=-1, id={1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 }, payload={},
command={}, domain={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=1277686,
securePort=-1, UDP Port=-1, id={-22 -45 110 -29 21 -22 75 95 -103 86 95
-119 15 48 -17 -27 }, payload={}
, command={}, domain={}, ]
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,
Théo C.
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