Hi,
I' ve try to use Tomcat 5.5.15 in cluster mod. And after some
work on
configuration and test
i seems to be on limit of my all possibilities ;)
I try to use two tomcat in cluster with apache web server and
mod_jk as
connector.
my Apache configuration look like :
# workers.properties
ps=/
# List the workers name
worker.list=loadbalancer
# ----------------
# First worker
# ----------------
worker.node01.port=8009
worker.node01.host=agnes
worker.node01.type=ajp13
worker.node01.lbfactor=1
#worker.node01.domain=cluster1
# ----------------
# Second worker
# ----------------
worker.node02.port=9009
worker.node02.host=ovea-inspiron
worker.node02.type=ajp13
worker.node02.lbfactor=1
#worker.node02.domain=cluster1
# ----------------------
# Load Balancer worker
# ----------------------
worker.loadbalancer.type=lb
worker.loadbalancer.sticky_session=false
worker.loadbalancer.balanced_workers=node01,node02
As you can see i use two server ('agnes' IP : 192.168.2.102 and
'ovea-inspiron' IP : 192.168.2.103)
I' ve coded a little aplication who read un file and create a
sessions if
session not exist.
If i use the system in mod load balancing (with no cluster mod
activate)
all is great (my config is of course
worker.loadbalancer.sticky_session=true
)
So system run with session affinitu but the two server are
accessible ;)
Now i try to configure as cluster mode with session replication
(my config is now worker.loadbalancer.sticky_session=3Dfalse)
I configure my to server.xml like that :
agnes (IP : 192.168.2.102)
<Server port="8005" shutdown="SHUTDOWN">
<GlobalNamingResources>
<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated
and saved"
factory="
org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml" />
</GlobalNamingResources>
<Service name="Catalina">
<Connector port="8080" maxHttpHeaderSize="8192"
maxThreads="150" minSpareThreads="25"
maxSpareThreads="75"
enableLookups="false" redirectPort="8443"
acceptCount="100"
connectionTimeout="20000"
disableUploadTimeout="true"
/>
<Connector port="8009" enableLookups="false"
redirectPort="8443" protocol="AJP/1.3" />
<Engine name="Catalina" defaultHost="localhost"
jvmRoute="node01" >
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase" />
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
<Cluster
className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
doClusterLog="true"
clusterLogName="clusterlog"
manager.className="
org.apache.catalina.cluster.session.DeltaManager"
manager.expireSessionsOnShutdown="false"
manager.notifyListenersOnReplication="true"
manager.notifySessionListenersOnReplication="true"
manager.sendAllSessions="true"
manager.sendAllSessionsSize="500"
manager.sendAllSessionsWaitTime="20">
<Membership className="
org.apache.catalina.cluster.mcast.McastService"
mcastBindAddress="192.168.2.102"
mcastAddr="224.0.0.1"
mcastPort="45564"
mcastFrequency="1000"
mcastDropTime="30000"/>
<Receiver className="
org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="192.168.2.102"
tcpListenPort="4000"
tcpSelectorTimeout="100"
tcpThreadCount="6" />
<Sender className="
org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="fastasyncqueue"
doTransmitterProcessingStats="true"
doProcessingStats="true"
doWaitAckStats="true"
queueTimeWait="true"
queueDoStats="true"
queueCheckLock="true"
ackTimeout="15000"
waitForAck="true"
keepAliveTimeout="80000"
keepAliveMaxRequestCount="-1" />
</Host>
</Engine>
</Service>
</Server>
ovea-inspiron (IP : 192.168.2.103)
<Server port="9005" shutdown="SHUTDOWN">
<GlobalNamingResources>
<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated
and
saved"
factory="
org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml" />
</GlobalNamingResources>
<Service name="Catalina">
<Connector port="9080" maxHttpHeaderSize="8192"
maxThreads="150" minSpareThreads="25"
maxSpareThreads="75"
enableLookups="false" redirectPort="8443"
acceptCount="100"
connectionTimeout="20000"
disableUploadTimeout="true"
/>
<Connector port="9009" enableLookups="false"
redirectPort="8443" protocol="AJP/1.3" />
<Engine name="Catalina" defaultHost="localhost"
jvmRoute="node02" >
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">
<Cluster
className="org.apache.catalina.cluster.tcp.SimpleTcpCluster"
doClusterLog="true"
clusterLogName="clusterlog"
manager.className="
org.apache.catalina.cluster.session.DeltaManager"
manager.expireSessionsOnShutdown="false"
manager.notifyListenersOnReplication="true"
manager.notifySessionListenersOnReplication="true"
manager.sendAllSessions="true"
manager.sendAllSessionsSize="500"
manager.sendAllSessionsWaitTime="20">
<Membership className="
org.apache.catalina.cluster.mcast.McastService"
mcastBindAddress="192.168.2.103"
mcastAddr="224.0.0.1"
mcastPort="45564"
mcastFrequency="1000"
mcastDropTime="30000"/>
<Receiver className="
org.apache.catalina.cluster.tcp.ReplicationListener"
tcpListenAddress="192.168.2.103"
tcpListenPort="4000"
tcpSelectorTimeout="100"
tcpThreadCount="6" />
<Sender className="
org.apache.catalina.cluster.tcp.ReplicationTransmitter"
replicationMode="fastasyncqueue"
doTransmitterProcessingStats="true"
doProcessingStats="true"
doWaitAckStats="true"
queueTimeWait="true"
queueDoStats="true"
queueCheckLock="true"
ackTimeout="15000"
waitForAck="true"
keepAliveTimeout="80000"
keepAliveMaxRequestCount="-1" />
</Host>
</Engine>
</Service>
</Server>
I'm user linux so i've compiled my kernel with multicat kernel
option
I add the rout like rooute add -host 224.0.0.1 dev eth0
N.B : why 224.0.0.1 => http://www.iana.org/assignments/multicast-
addresses
So route is :
ALL-SYSTEMS.MCA * 255.255.255.255 UH 0 0 0 eth0
192.168.2.0 * 255.255.255.0 U 0
0 0
eth0
loopback * 255.0.0.0 U 0 0
0 lo
default . 0.0.0.0 UG
0 0
0 eth0
now i start the two tomcat with the same application in webapp
directories
with tcpdump i verify the multicasting btewen my server .. so :
19:39:17.809978 IP 192.168.2.102.45564 > all-systems.mcast.net.
45564:UDP,
length 56
19:39:18.546034 IP ovea-inspiron.45564 > all-systems.mcast.net.
45564:UDP,
length 56
19:39:18.814418 IP 192.168.2.102.45564 > all-systems.mcast.net.
45564UDP,
length 56
19:39:19.790470 IP ovea-inspiron.45564 > all-systems.mcast.net.
45564:UDP,
length 56
19:39:19.818691 IP 192.168.2.102.45564 > all-systems.mcast.net.
45564:UDP,
length 56
19:39:20.826650 IP 192.168.2.102.45564 > all-systems.mcast.net.
45564:UDP,
length 56
19:39:20.943933 IP ovea-inspiron.45564 > all-systems.mcast.net.
45564:UDP,
length 56
19:39:21.806813 arp who-has . tell 192.168.2.102
19:39:21.806972 arp reply . is-at 00:04:e2:b6:65:0a (oui Unknown)
19:39:21.831048 IP 192.168.2.102.45564 > all-systems.mcast.net.
45564:UDP,
length 56
19:39:22.164812 IP ovea-inspiron.45564 > all-systems.mcast.net.
45564:UDP,
length 56
19:39:22.835240 IP 192.168.2.102.45564 > all-systems.mcast.net.
45564:UDP,
length 56
So all semms to be OK but i've
Feb 14, 2006 6:33:26 PM
org.apache.catalina.cluster.tcp.SimpleTcpCluster st
art
INFO: Cluster is about to start
Feb 14, 2006 6:33:26 PM
org.apache.catalina.cluster.tcp.SimpleTcpClustercreateDefaultCluster
Va
lves
INFO: Add Default ClusterValves at cluster localhost
Feb 14, 2006 6:33:26 PM
org.apache.catalina.cluster.tcp.SimpleTcpClustercreateDefaultCluster
Li
stener
INFO: Add Default ClusterListener at cluster localhost
Feb 14, 2006 6:33:26 PM
org.apache.catalina.cluster.tcp.ReplicationTransmitter start
INFO: Start ClusterSender at cluster
Catalina:type=3DCluster,host=3Dlocalhost
with name Catalina:type=3DClusterSender,host=3Dlocalhost
Feb 14, 2006 6:33:26 PM
org.apache.catalina.cluster.mcast.McastServiceImplsetupSocket
INFO: Setting multihome multicast interface to:/192.168.2.102
Feb 14, 2006 6:33:26 PM
org.apache.catalina.cluster.mcast.McastService start
INFO: Sleeping for 4000 secs to establish cluster membership
Feb 14, 2006 6:33:30 PM
org.apache.catalina.cluster.mcast.McastServiceregisterMBean
INFO: membership mbean registered
(Catalina:type=3DClusterMembership,host=3Dlocalhost)
Feb 14, 2006 6:33:31 PM org.apache.catalina.startup.HostConfig
deployWAR
INFO: Deploying web application archive cluster-1.0-SNAPSHOT.war
Feb 14, 2006 6:33:31 PM
org.apache.catalina.cluster.session.DeltaManager st
art
INFO: Register manager /cluster-1.0-SNAPSHOT to cluster element
Host with
name localhost
Feb 14, 2006 6:33:31 PM
org.apache.catalina.cluster.session.DeltaManager st
art
INFO: Starting clustering manager at /cluster-1.0-SNAPSHOT
Feb 14, 2006 6:33:31 PM
org.apache.catalina.cluster.session.DeltaManagergetAllClusterSession
s
INFO: Manager [/cluster-1.0-SNAPSHOT]: skipping state transfer. No
members
active in cluster group.
As you can see in the last line cluster member are not found !!!!
What's the hell ;)
When i test my application i've always the sequences :
This page is rendered on server : *Cluster Node - 01 (One) New
session is
created with saved value ....UserId : 123456
This page is rendered on server : *Cluster Node - 02 (Two) New
session is
created with saved value ....UserId : 123456
This page is rendered on server : *Cluster Node - 01 (One) New
session is
created with saved value ....UserId : 123456
So the request is well balanced but a new session is alway
created !!!!!
Some ideas ...
Thank you guys
