集群配置文件，没有做任何多余的配置，本地和阿里云的另外一台机器都正常，只有这一天机器出现这个问题：

<Engine name="Catalina" defaultHost="localhost">

      <!--For clustering, please take a look at documentation at:
          /docs/cluster-howto.html  (simple how to)
          /docs/config/cluster.html (reference documentation) -->
      <!-- -->
      <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
      

      <!-- Use the LockOutRealm to prevent attempts to guess user passwords
           via a brute-force attack -->
      <Realm className="org.apache.catalina.realm.LockOutRealm">
        <!-- This Realm uses the UserDatabase configured in the global JNDI
             resources under the key "UserDatabase".  Any edits
             that are performed against this UserDatabase are immediately
             available for use by the Realm.  -->
        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>

      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">

        <!-- SingleSignOn valve, share authentication between web applications
             Documentation at: /docs/config/valve.html -->
        <!--
        <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
        -->

        <!-- Access log processes all example.
             Documentation at: /docs/config/valve.html
             Note: The pattern used is equivalent to using pattern="common" -->
        <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>

==================================================================
2013-07-17 09:08:56 Commons Daemon procrun stderr initialized
七月 17, 2013 9:08:57 上午 org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Apache Software Foundation\Tomcat 7.0\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;D:\Program Files\Huweishen.com\PHPWEB\php;.
七月 17, 2013 9:08:58 上午 org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
七月 17, 2013 9:08:58 上午 org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
七月 17, 2013 9:08:58 上午 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 913 ms
七月 17, 2013 9:08:58 上午 org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
七月 17, 2013 9:08:58 上午 org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.42
七月 17, 2013 9:08:58 上午 org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\docs
七月 17, 2013 9:08:58 上午 org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\manager
七月 17, 2013 9:08:58 上午 org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\ROOT
七月 17, 2013 9:08:58 上午 org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
七月 17, 2013 9:08:58 上午 org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
七月 17, 2013 9:08:58 上午 org.apache.catalina.startup.Catalina start
INFO: Server startup in 690 ms
七月 17, 2013 9:09:30 上午 org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-8080"]
七月 17, 2013 9:09:30 上午 org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-bio-8009"]
七月 17, 2013 9:09:30 上午 org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
七月 17, 2013 9:09:31 上午 org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["http-bio-8080"]
七月 17, 2013 9:09:31 上午 org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["ajp-bio-8009"]

2013-07-17 09:09:35 Commons Daemon procrun stderr initialized
七月 17, 2013 9:09:35 上午 org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Apache Software Foundation\Tomcat 7.0\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;D:\Program Files\Huweishen.com\PHPWEB\php;.
七月 17, 2013 9:09:36 上午 org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
七月 17, 2013 9:09:36 上午 org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
七月 17, 2013 9:09:36 上午 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 955 ms
七月 17, 2013 9:09:36 上午 org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
七月 17, 2013 9:09:36 上午 org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.42
七月 17, 2013 9:09:36 上午 org.apache.catalina.ha.tcp.SimpleTcpCluster startInternal
INFO: Cluster is about to start
七月 17, 2013 9:09:36 上午 org.apache.catalina.tribes.transport.ReceiverBase bind
INFO: Receiver Server Socket bound to:/121.199.51.200:4000
七月 17, 2013 9:09:36 上午 org.apache.catalina.tribes.membership.McastServiceImpl setupSocket
INFO: Setting cluster mcast soTimeout to 500
七月 17, 2013 9:09:36 上午 org.apache.catalina.tribes.membership.McastServiceImpl start
SEVERE: Unable to join multicast group, make sure your system has multicasting enabled.
七月 17, 2013 9:09:36 上午 org.apache.catalina.ha.tcp.SimpleTcpCluster startInternal
SEVERE: Unable to start cluster.
org.apache.catalina.tribes.ChannelException: java.net.SocketException: error setting options; No faulty members identified.
at org.apache.catalina.tribes.group.ChannelCoordinator.internalStart(ChannelCoordinator.java:178)
at org.apache.catalina.tribes.group.ChannelCoordinator.start(ChannelCoordinator.java:99)
at org.apache.catalina.tribes.group.ChannelInterceptorBase.start(ChannelInterceptorBase.java:162)
at org.apache.catalina.tribes.group.ChannelInterceptorBase.start(ChannelInterceptorBase.java:162)
at org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor.start(MessageDispatchInterceptor.java:157)
at org.apache.catalina.tribes.group.ChannelInterceptorBase.start(ChannelInterceptorBase.java:162)
at org.apache.catalina.tribes.group.GroupChannel.start(GroupChannel.java:419)
at org.apache.catalina.ha.tcp.SimpleTcpCluster.startInternal(SimpleTcpCluster.java:685)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1106)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Catalina.start(Catalina.java:691)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:456)
Caused by: java.net.SocketException: error setting options
at java.net.TwoStacksPlainDatagramSocketImpl.join(Native Method)
at java.net.AbstractPlainDatagramSocketImpl.join(AbstractPlainDatagramSocketImpl.java:178)
at java.net.MulticastSocket.joinGroup(MulticastSocket.java:319)
at org.apache.catalina.tribes.membership.McastServiceImpl.start(McastServiceImpl.java:254)
at org.apache.catalina.tribes.membership.McastService.start(McastService.java:447)
at org.apache.catalina.tribes.group.ChannelCoordinator.internalStart(ChannelCoordinator.java:163)
... 22 more

七月 17, 2013 9:09:36 上午 org.apache.catalina.startup.Catalina start
SEVERE: The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.startup.Catalina.start(Catalina.java:691)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:456)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)


at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 7 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 9 more
Caused by: org.apache.catalina.LifecycleException: Failed to start component [org.apache.catalina.ha.tcp.SimpleTcpCluster[Catalina]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1106)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 11 more
Caused by: org.apache.catalina.LifecycleException: org.apache.catalina.tribes.ChannelException: java.net.SocketException: error setting options; No faulty members identified.
at org.apache.catalina.ha.tcp.SimpleTcpCluster.startInternal(SimpleTcpCluster.java:690)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 14 more
Caused by: org.apache.catalina.tribes.ChannelException: java.net.SocketException: error setting options; No faulty members identified.
at org.apache.catalina.tribes.group.ChannelCoordinator.internalStart(ChannelCoordinator.java:178)
at org.apache.catalina.tribes.group.ChannelCoordinator.start(ChannelCoordinator.java:99)
at org.apache.catalina.tribes.group.ChannelInterceptorBase.start(ChannelInterceptorBase.java:162)
at org.apache.catalina.tribes.group.ChannelInterceptorBase.start(ChannelInterceptorBase.java:162)
at org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor.start(MessageDispatchInterceptor.java:157)
at org.apache.catalina.tribes.group.ChannelInterceptorBase.start(ChannelInterceptorBase.java:162)
at org.apache.catalina.tribes.group.GroupChannel.start(GroupChannel.java:419)
at org.apache.catalina.ha.tcp.SimpleTcpCluster.startInternal(SimpleTcpCluster.java:685)
... 15 more
Caused by: java.net.SocketException: error setting options
at java.net.TwoStacksPlainDatagramSocketImpl.join(Native Method)
at java.net.AbstractPlainDatagramSocketImpl.join(AbstractPlainDatagramSocketImpl.java:178)
at java.net.MulticastSocket.joinGroup(MulticastSocket.java:319)
at org.apache.catalina.tribes.membership.McastServiceImpl.start(McastServiceImpl.java:254)
at org.apache.catalina.tribes.membership.McastService.start(McastService.java:447)
at org.apache.catalina.tribes.group.ChannelCoordinator.internalStart(ChannelCoordinator.java:163)
... 22 more

七月 17, 2013 9:09:36 上午 org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-8080"]
七月 17, 2013 9:09:36 上午 org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-bio-8009"]
七月 17, 2013 9:09:36 上午 org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
七月 17, 2013 9:09:36 上午 org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["http-bio-8080"]
七月 17, 2013 9:09:36 上午 org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["ajp-bio-8009"]