Wait a second, are both your instances on the same machine? Are you
running Apache Tomcat 6.0.20
there was a serious regression, with the loopback turned off.
https://issues.apache.org/bugzilla/show_bug.cgi?id=47308
Filip
On 07/17/2009 08:54 AM, Mitch Claborn wrote:
ping 224.0.0.1
PING 224.0.0.1 (224.0.0.1) 56(84) bytes of data.
64 bytes from 192.168.3.254: icmp_seq=1 ttl=255 time=0.895 ms
64 bytes from 192.168.3.254: icmp_seq=2 ttl=255 time=0.693 ms
64 bytes from 192.168.3.254: icmp_seq=3 ttl=255 time=0.686 ms
Mitch
Filip Hanik - Dev Lists wrote:
correct, you're members are not discovering each other.
and its purely multicast related.
what do you get when you do
ping 224.0.0.1
Filip
On 07/16/2009 05:16 PM, Mitch Claborn wrote:
Not having much luck getting a simple cluster to work. Using nginx as
a front end/load balancer against two tomcat instances on the same
machine (for now). SuSE Linux 11.1. I see this message in the startup
log, making me think the tomcat instances are not talking:
INFO: Manager [localhost#/Struts1]: skipping state transfer. No members
active in cluster group.
I have a simple test page in the web app that shows the session ID and
the instance of tomcat that it is hitting (by server port number) and
the session id changes whenever ngnix directs the request to a different
instance.
as far as I can tell, multicast is enabled on eth0:
eth0 Link encap:Ethernet HWaddr 00:1D:09:C4:C2:9A
inet addr:192.168.3.5 Bcast:192.168.3.255
Mask:255.255.255.0
inet6 addr: fe80::21d:9ff:fec4:c29a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
I've added a route for the mulitcast address to eth0:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
228.0.0.4 0.0.0.0 255.255.255.255 UH 0 0
0 eth0
192.168.3.0 0.0.0.0 255.255.255.0 U 1 0
0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0
0 lo
0.0.0.0 192.168.3.254 0.0.0.0 UG 0 0
0 eth0
localhost is mapped to the eth0 interface:
ping localhost
PING mlcx300 (192.168.3.5) 56(84) bytes of data.
64 bytes from mlcx300 (192.168.3.5): icmp_seq=1 ttl=64 time=0.046 ms
I've tried the simple config:
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
as well as the detailed config below. Any pointers or ideas are
welcome.
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelSendOptions="6">
<Manager
className="org.apache.catalina.ha.session.DeltaManager"
name="MMClusterManatger"
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="5000"
autoBind="100"
selectorTimeout="100"
minThreads="2"
maxThreads="6"/>
<Sender
className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport
className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"
poolSize="25"/>
</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;.*\.jpg;.*\.png;.*\.css;.*\.txt;"
statistics="true"
/>
<Deployer
className="org.apache.catalina.ha.deploy.FarmWarDeployer"
tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/>
<ClusterListener
className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>
Here are the cluster related messages from the startup of instance 2:
INFO: Cluster is about to start
Jul 16, 2009 6:03:26 PM
org.apache.catalina.tribes.transport.ReceiverBase bind
INFO: Receiver Server Socket bound to:/192.168.3.5:4001
Jul 16, 2009 6:03:26 PM
org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Setting cluster mcast soTimeout to 500
Jul 16, 2009 6:03:26 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Sleeping for 1000 milliseconds to establish cluster membership,
start level:4
Jul 16, 2009 6:03:27 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Done sleeping, membership established, start level:4
Jul 16, 2009 6:03:27 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Sleeping for 1000 milliseconds to establish cluster membership,
start level:8
Jul 16, 2009 6:03:28 PM
org.apache.catalina.tribes.membership.McastServiceImpl waitForMembers
INFO: Done sleeping, membership established, start level:8
Jul 16, 2009 6:03:29 PM org.apache.catalina.ha.session.DeltaManager
start
INFO: Register manager /Struts1 to cluster element Engine with name
Catalina
Jul 16, 2009 6:03:29 PM org.apache.catalina.ha.session.DeltaManager
start
INFO: Starting clustering manager at /Struts1
Jul 16, 2009 6:03:29 PM org.apache.catalina.ha.session.DeltaManager
getAllClusterSessions
INFO: Manager [localhost#/Struts1]: skipping state transfer. No members
active in cluster group.
Mitch
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