在启用群集后,始终会重新创建会话

时间:2013-12-03 14:34:31

标签: apache tomcat cluster-computing mod-jk session-replication

Apache / Tomcat设置

            Apache
              |
             / \
           /     \
         C1       C2           Clusters
         |         |
        / \       / \
      /     \   /     \
     T1     T2  T3     T4      Tomcats
  • Windows Server 2012
  • Apache 2.2.25
  • mod_jk 1.2.20
  • Tomcat 7.0.42

我在C1和C2上有负载均衡。 T1和T2是一组,T3和T4是另一组。 C1和C2是独立的。

workers.properties

worker.list=jkstatus,Cluster1,Cluster2,C1T1,C1T2,C2T1,C2T2
worker.jkstatus.type=status

# Configuration Cluster 1
worker.Cluster1.type=lb
worker.Cluster1.balance_workers=C1T1,C1T2

worker.C1T1.port=8119
worker.C1T1.host=localhost
worker.C1T1.type=ajp13
worker.C1T1.lbfactor=1
worker.C1T1.redirect=C1T2

worker.C1T2.port=8129
worker.C1T2.host=localhost
worker.C1T2.type=ajp13
worker.C1T2.lbfactor=1
worker.C1T2.redirect=C1T1

# Configuration Cluster 2
worker.Cluster2.type=lb
worker.Cluster2.balance_workers=C2T1,C2T2

worker.C2T1.port=8219
worker.C2T1.host=localhost
worker.C2T1.type=ajp13
worker.C2T1.lbfactor=1
worker.C2T1.redirect=C2T2

worker.C2T2.port=8229
worker.C2T2.host=localhost
worker.C2T2.type=ajp13
worker.C2T2.lbfactor=1
worker.C2T2.redirect=C2T1

Apache将每个请求重定向到 Cluster1 Cluster2

JkMount /MyApp/* Cluster1

server.xml中

<Engine name="Catalina" defaultHost="localhost" jvmRoute="C1T1">
    <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="45562" frequency="500" dropTime="3000"/>
            <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
                <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
            </Sender>
            <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="auto" port="4001" autoBind="100" selectorTimeout="5000" maxThreads="6"/>
            <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"/>
        <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>

T1 / T2具有相同的地址/端口,T3 / T4具有相同的地址/端口(与T1 / T2不同)。

我遵循了这一点:http://tomcat.apache.org/tomcat-7.0-doc/cluster-howto.html而且:http://tomcat.apache.org/connectors-doc/reference/workers.html

加载balacing工作正常。如果我在群集上关闭一个Tomcat,Apache会将所有请求重定向到另一个Tomcat。会话也被复制(我使用JConsole跟踪两个Tomcat上的活动会话数)。

现在,这是我的问题

每次点击F5,都会创建一个新会话(我在Tomcat上使用@SessionBean)。如果我通过使用HTTP端口直接访问Tomcat来绕过群集,则会创建一个新会话,但是当我按F5时不会创建新会话。

我想知道为什么在使用Apache访问时,会在每个请求上创建一个新会话(以及如何修复它!)。

1 个答案:

答案 0 :(得分:0)

终于明白了。

群集不会导致此问题。它是JSF的JSESSIONID cookie:它的路径是/MyApp/而不是/(apache forward //MyApp/)。

编辑:必须在tomcats的sessionCookiePath="/"文件(<Context ...></Context>)上设置conf/context.xml,如下所示:

<Context sessionCookiePath="/">
    ...
</Context>