On 2014-12-09 19:01, Mark Eggers wrote:
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On 12/9/2014 9:48 AM, Daniel Mikusa wrote:
On Tue, Dec 9, 2014 at 9:16 AM, Théo Chamley <theo...@mley.fr>
wrote:

On 2014-12-08 21:22, Ameer Mawia wrote:

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

<Member
className="org.apache.catalina.tribes.membership.StaticMember"
port="4001" host="192.168.1.6"
uniqueId="{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, Théo Chamley <theo...@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 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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Hello,

Thank you for your answer. Indeed, I need both nodes in the
Interceptor, but something else is wrong. I missed it the first
time, but the official documentation mentions that the
TcpFailureDetector must be above the
StaticMembershipInterceptor. I suspect that it is also true of
the other Interceptors, but I'm not sure.

Here is my conf right now. I made some progress: I now have
trafic between the two servers on the port 4110. Its regularity
makes my think it's a heartbeat. However, the two Tomcat still do
not share any sessions.

<Engine name="Catalina" defaultHost="localhost"> <Cluster
className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelStartOptions="3">

<Manager className="org.apache.catalina.ha.session.
DeltaManager" expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"/>

<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"/>

<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.TcpPingInterceptor"/> <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.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}"/> <Member
className="org.apache. catalina.tribes.membership.StaticMember"
port="4110" host="my.server.2" domain="staging-cluster"
uniqueId="{0,1,2,3,4,5,6,7,8, 9,10,11,12,13,14,15}"/>
</Interceptor> </Channel> <Valve
className="org.apache.catalina.ha.tcp.ReplicationValve"
filter=".*\.gif|.*\.js|.*\.jpeg|.*\.jpg|.*\.png|.*\.css|.
*\.txt"/> <Valve className="org.apache.catalina.ha.session.
JvmRouteBinderValve"/> <ClusterListener
className="org.apache.catalina.ha.session.
ClusterSessionListener"/> </Cluster> [...] </Engine>


Is there some way for me to debug what is happening?


Have you turned on debug level logging?  Maybe try packages like
"org.apache.catalina.ha" and "org.apache.catalina.tribes".  From
what I remember, it spits out a lot of information.

Dan

- From my Tomcat 7 cluster experiment (check the documentation to see if
things have changed in Tomcat 8):

# logging.properties

# all one line
# note 5cluster.org.apache.juli.FileHandler at the end
#
handlers = 1catalina.org.apache.juli.FileHandler,
2localhost.org.apache.juli.FileHandler,
3manager.org.apache.juli.FileHandler,
4host-manager.org.apache.juli.FileHandler,
java.util.logging.ConsoleHandler,5cluster.org.apache.juli.FileHandler

# defining the general log information
#
5cluster.org.apache.juli.FileHandler.level = FINER
5cluster.org.apache.juli.FileHandler.directory = ${catalina.base}/logs
5cluster.org.apache.juli.FileHandler.prefix = cluster.

# cluster logs - have removed farm deployer log configuration
# beware the line wrap
#
org.apache.catalina.tribes.MESSAGES.level = FINE
org.apache.catalina.tribes.MESSAGES.handlers =
5cluster.org.apache.juli.FileHandler

org.apache.catalina.tribes.level = FINE
org.apache.catalina.tribes.handlers = 5cluster.org.apache.juli.FileHandler

org.apache.catalina.ha.level = FINE
org.apache.catalina.ha.handlers = 5cluster.org.apache.juli.FileHander

. . . just my two cents
/mde/
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Hello,

Thank you all for your help.
Mark, things haven't changed on Tomcat8 for the logging properties, your configuration did work.

In the end, I had two problems:
* My client did not have a <distributable/> element in his web.xml
* More importantly, the NioReceiver was not well configured.

The "address" parameter as defined in the documentation (http://tomcat.apache.org/tomcat-8.0-doc/config/cluster-receiver.html) was more that what I thought. It is not only the binding address for the receiver, it's also the address that will be advertised to the other nodes of the cluster. I configured it to "0.0.0.0", therefore the other node tried to connect to "0.0.0.0:<port>". You can see the problem...
Replacing this address by a routable one solved my problem.
Even if it is quite logical, I think the documentation could be clearer on this point.

Thank you again,

Théo


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