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Tomcat session replication issue

TL DR - the node name in sessionId is not updated to the current node name in the backup when the primary is down.

Tomcat version - apache-tomcat-7.0.50

I have two nodes (2 instances of my application in 2 separate comments), with session replication setup (a sticky session is also used). Below is the cluster configuration from server.xml, which is inside the Engine tag. It is similar in both nodes, with the exception of port numbers:

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8">
    <Manager className="org.apache.catalina.ha.session.DeltaManager"
    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="4050"
        autoBind="100"
        selectorTimeout="5000"
        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.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=""/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>

<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.JvmRouteSessionIDBinderListener"/>
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>

From the tomcat manager, I see that this session (example: D042A0C5E380EB9E500224C87233119C.myNode1) is created in the main node at login and is correctly replicated in the backup.

, node , , sessionId node node i.e: D042A0C5E380EB9E500224C87233119C.myNode2

:

:

Node 1 - Primary - jsessionIdSample.node1 
Node 2 - Backup - jsessionIdSample.node1

node 1 ():

Node 1 - - jsessionIdSample.node1 (NODE GOES DOWN) 
Node 2 - Primary - jsessionIdSample.node2

:

Node 1 - - jsessionIdSample.node1 (NODE DOWN) 
Node 2 - Backup - jsessionIdSample.node1

:

1) , sessionID , node ? tomcat, , , .

2) , , ? SO, , , .

: :

Node 1

    <Engine name="Catalina" defaultHost="localhost" jvmRoute="node1">
  <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster">
              <Manager className="org.apache.catalina.ha.session.DeltaManager"
               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="228.0.0.4"
                  port="4005"
                  autoBind="100"
                  selectorTimeout="5000"
                  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.TcpFailureDetector"/>
        <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
      </Channel>

      <Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
             filter=""/>
      <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>

      <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.JvmRouteSessionIDBinderListener"/>
      <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
  </Cluster>

  <Realm className="org.apache.catalina.realm.LockOutRealm">
    <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
           resourceName="UserDatabase"/>
  </Realm>

  <Host name="localhost" appBase="webapps"
        unpackWARs="true" autoDeploy="true">
    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
           prefix="localhost_access_log." suffix=".txt"
           pattern="%h %l %u %t &quot;%r&quot; %s %b" />
  </Host>
</Engine>

Node 2

    <Engine name="Catalina" defaultHost="localhost" jvmRoute="node2">
  <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster">
              <Manager className="org.apache.catalina.ha.session.DeltaManager"
               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="228.0.0.4"
                  port="4010"
                  autoBind="100"
                  selectorTimeout="5000"
                  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.TcpFailureDetector"/>
        <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
      </Channel>

      <Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
             filter=""/>
      <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>

      <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.JvmRouteSessionIDBinderListener"/>
      <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
  </Cluster>

  <Realm className="org.apache.catalina.realm.LockOutRealm">
    <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
           resourceName="UserDatabase"/>
  </Realm>

  <Host name="localhost" appBase="webapps"
        unpackWARs="true" autoDeploy="true">
    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
           prefix="localhost_access_log." suffix=".txt"
           pattern="%h %l %u %t &quot;%r&quot; %s %b" />
  </Host>
</Engine>

!

+4
1

, - .

:

Node 1 - Primary - jsessionIdSample.node1 
Node 2 - Backup -  jsessionIdSample.node1

Node 2 , .node2?

, IMHO, jvmRoute <Engine> - Node 1 <Engine jvmRoute="node1">, , Node 1. , .

jvmRoute - loadbalancer, , . , , Node 2 jvmRoute="node2". tomcat.

, - - . , Node 1 Node 2 "node1" . ( ). , Apache httpd, , employee.properties( , . . https://tomcat.apache.org/connectors-doc/reference/workers.html)

+1

Source: https://habr.com/ru/post/1657048/

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