I'm using the cluster fix patch on 5.5.9 (from
http://issues.apache.org/bugzilla/show_bug.cgi?id=34389) with 8 hosts
clustered together. I was seeing alot
of memberDisappeared errors before I applied this patch, now I'm still
seeing them, but with more detail.
Here's an example error from catalina.out:
Jul 18, 2005 5:40:51 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster
memberDisappeared
INFO: Received member
disappeared:org.apache.catalina.cluster.mcast.McastMember[tcp://10.0.0.15:4002,10.0.0.15,4002,
alive=1018550]
Jul 18, 2005 5:40:51 PM org.apache.catalina.cluster.tcp.DataSender
pushMessage
INFO: resending 782 bytes to 10.0.0.15:4002 from 55784
java.net.SocketException: Socket closed
at java.net.SocketInputStream.read(SocketInputStream.java:162)
at java.net.SocketInputStream.read(SocketInputStream.java:182)
at
org.apache.catalina.cluster.tcp.DataSender.waitForAck(DataSender.java:542)
at
org.apache.catalina.cluster.tcp.DataSender.pushMessage(DataSender.java:504)
at
org.apache.catalina.cluster.tcp.FastAsyncSocketSender$FastQueueThread.run(FastAsyncSocketSender.java:401)
A typical cluster config is:
<Cluster
className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
name="hydraNation"
managerClassName="org.apache.catalina.cluster.session.DeltaManager"
expireSessionsOnShutdown="false"
useDirtyFlag="true"
notifyListenersOnReplication="true">
<Membership
className="org.apache.catalina.cluster.mcast.McastService"
mcastAddr="228.0.0.4"
mcastPort="45564"
mcastFrequency="700"
mcastDropTime="5000"/>
<Receiver
className="org.apache.catalina.cluster.tcp.Jdk13ReplicationListener"
tcpListenAddress="10.0.0.12"
compress="false"
tcpListenPort="4002"
/>
<Sender
className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="fastasyncqueue"
compress="false"
doProcessingStats="true"
queueTimeWait="true"
maxQueueLength="1000"
queueDoStats="true"
queueCheckLock="true"
ackTimeout="15000"
waitForAck="true"
autoConnect="false"
keepAliveTimeout="@node.ackTimeout@"
keepAliveMaxRequestCount="-1"/>
<Valve
className="org.apache.catalina.cluster.tcp.ReplicationValve"
filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>
<Deployer
className="org.apache.catalina.cluster.deploy.FarmWarDeployer"
tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/"
watchDir="/tmp/war-listen/"
watchEnabled="false"/>
</Cluster>
any ideas? I'm thinking there's something wrong with my multicast setup,
but everything was working fine this morning... The servers are running
RHEL3, all 2 way AMD64 machines with 4Gb ram each. They each have two
network interfaces, each eth0 is connected to one gigabit switch, each
eth1 to another (internal) gigabit switch. I don't think I should be
hitting any network bottlenecks.. ? There is alot of load on the site
being served in general, but no big jump in hits today.
Should I be using a fastasyncqueue? What are the tradeoffs in Sender modes?
Thanks in advance!
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