the default dropTime from MCastService is 3 secs e.g.
properties.setProperty("memberDropTime","3000");
would suggest increase memberDropTime property (so MCastService detects a
Heartbeat)
Martin
does anyone knows what op means about 'going home'?
______________________________________________
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> Date: Sat, 11 Apr 2009 15:03:02 -0700
> From: [email protected]
> Subject: Replication Stops Overnight
> To: [email protected]
>
>
> Greetings,
>
> We are using tomcat6 cluster in two data-centers with replicated sessions.
> We are not using multicast because multicast broadcast between network
> subnets/zones is difficult to setup, so instead we are using static members
> (data center 1: webd101, and webd102 / data center 2: webd201, webd202).
>
> Everything works fine during normal hours and *all 4* servers receive session
> replication... but if I go home for the night and come back in the morning...
> data center 1 does not replicate new sessions to data center 2 (and vice
> versa). For example, a new session will get replicated between: webd101
> and webd102 ... but it will not make its way over to webd201 and webd202.
>
> It's like the connection between data centers gets clipped by the
> ??firewall?? ... and won't automatically pick back up.
>
> The strange thing is... the heartbeats are still flowing so all 4 tomcat
> instances still know they are all alive.
>
> I'm currently testing explicity setting the firewall to "never" clip
> connections on port 4000... I have to wait until tomorrow to see if it works.
>
>
> In the meantime... are there any other server.xml settings I can set to try
> and get this to pick back up?
>
>
> I found one error message in catalina.out (only on 1 of 4 clusters):
> ----------------------------
> Apr 11, 2009 4:08:47 AM
> org.apache.catalina.tribes.transport.nio.NioReplicationTask run
> WARNING: IOException in replication worker, unable to drain channel. Probable
> cause: Keep alive socket closed[Connection reset by peer].
> ---------------------------
>
> Below is the cluster section of my server.xml:
>
>
> <!-- Clustering support
> http://tomcat.apache.org/tomcat-6.0-doc/cluster-howto.html -->
> <Cluster
> className="org.apache.catalina.ha.tcp.SimpleTcpCluster">
>
> <!-- Specifies not to replicate session data
> from files that can't alter sessions -->
> <Valve
> className="org.apache.catalina.ha.tcp.ReplicationValve"
>
> filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;.*\.pdf;.*\.jsp;"/>
>
> <!-- Default High Avialibilty Manager -->
> <Manager
> className="org.apache.catalina.ha.session.DeltaManager"
> domainReplication="false"
> expireSessionsOnShutdown="false"
> notifyListenersOnReplication="true"/>
>
> <!-- Default Send Receive Channels -->
> <Channel
> className="org.apache.catalina.tribes.group.GroupChannel">
>
> <!-- Default Non Blocking Receiver -->
> <Receiver
> className="org.apache.catalina.tribes.transport.nio.NioReceiver"
> address="auto"
> port="4000"
> autoBind="0"
> selectorTimeout="100"
> maxThreads="6"/>
>
> <!-- Default Sender -->
> <Sender
> className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
> <Transport
> className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
> </Sender>
>
> <!-- Only Ping Static Entries (No
> Multicast) -->
> <Interceptor
> className="org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor"
> staticOnly="true" />
> <Interceptor
> className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
>
> <!-- Static Members -->
> <Interceptor
> className="org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor">
> <!--
> <Member
> className="org.apache.catalina.tribes.membership.StaticMember"
> port="4000"
> host="webd101"
>
> uniqueId="{10,101,1,121,0,0,0,0,0,0,0,0,0,0,0,0}"/>
> -->
> <Member
> className="org.apache.catalina.tribes.membership.StaticMember"
> port="4000"
> host="webd102"
>
> uniqueId="{10,101,1,122,0,0,0,0,0,0,0,0,0,0,0,0}"/>
> <Member
> className="org.apache.catalina.tribes.membership.StaticMember"
> port="4000"
> host="webd201"
>
> uniqueId="{10,102,1,121,0,0,0,0,0,0,0,0,0,0,0,0}"/>
> <Member
> className="org.apache.catalina.tribes.membership.StaticMember"
> port="4000"
> host="webd202"
>
> uniqueId="{10,102,1,122,0,0,0,0,0,0,0,0,0,0,0,0}"/>
> </Interceptor>
>
> <Interceptor
> className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
> <Interceptor
> className="com.custom.tomcat.interceptors.DisableMcastInterceptor" />
> <Interceptor
> className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>
> </Channel>
> </Cluster>
>
>
>
> Thanks for any help in advance!
>
>
>
>
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