Hi,
I'm trying to test simple session sharing using SimpleTCPCluster on
Tomcat 7.0.32.
Following the documentation, I've uncommented the <Cluster
className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> element, and
ensured <distributable /> is in the web.xml of the examples web app.
>From the docs:
- All your session attributes must implement java.io.Serializable
I know the webapps don't, but for proof of concept this is fine. My
real app does.
- Uncomment the Cluster element in server.xml
Done.
- If you have defined custom cluster valves, make sure you have the
ReplicationValve defined as well under the Cluster element in
server.xml
I haven't.
- If your Tomcat instances are running on the same machine, make sure
the tcpListenPort attribute is unique for each instance, in most cases
Tomcat is smart enough to resolve this on it's own by autodetecting
available ports in the range 4000-4100
I have 2 x VMs running on CentOS 6.3, on different IPs
- Make sure your web.xml has the <distributable/> element
Done.
- If you are using mod_jk, make sure that jvmRoute attribute is set at
your Engine <Engine name="Catalina" jvmRoute="node01" > and that the
jvmRoute attribute value matches your worker name in
workers.properties
I'm not.
- Make sure that all nodes have the same time and sync with NTP service!
Done.
- Make sure that your loadbalancer is configured for sticky session mode.
Done (I'm using haproxy).
However, on starting Tomcat, I see:
Nov 20, 2012 10:50:16 AM org.apache.catalina.startup.Catalina start
SEVERE: Catalina.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:684)
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:601)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:451)
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.lang.IllegalArgumentException: java.net.UnknownHostException:
auto: Name or service not known; No faulty members identified.
at
org.apache.catalina.ha.tcp.SimpleTcpCluster.startInternal(SimpleTcpCluster.java:674)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 14 more
Caused by: org.apache.catalina.tribes.ChannelException:
java.lang.IllegalArgumentException: java.net.UnknownHostException:
auto: Name or service not known; 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:669)
... 15 more
Caused by: java.lang.IllegalArgumentException:
java.net.UnknownHostException: auto: Name or service not known
at
org.apache.catalina.tribes.membership.McastService.setLocalMemberProperties(McastService.java:182)
at
org.apache.catalina.tribes.group.ChannelCoordinator.internalStart(ChannelCoordinator.java:147)
... 22 more
Caused by: java.net.UnknownHostException: auto: Name or service not known
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:866)
at
java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1258)
at java.net.InetAddress.getAllByName0(InetAddress.java:1211)
at java.net.InetAddress.getAllByName(InetAddress.java:1127)
at java.net.InetAddress.getAllByName(InetAddress.java:1063)
at java.net.InetAddress.getByName(InetAddress.java:1013)
at
org.apache.catalina.tribes.membership.MemberImpl.setHostname(MemberImpl.java:598)
at
org.apache.catalina.tribes.membership.MemberImpl.<init>(MemberImpl.java:142)
at
org.apache.catalina.tribes.membership.McastService.setLocalMemberProperties(McastService.java:173)
... 23 more
Nov 20, 2012 10:50:16 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 285 ms
I can connect to the machine on port 8080, but nothing is served:
# telnet 10.1.1.214 8080
Trying 10.1.1.214...
Connected to 10.1.1.214.
Escape character is '^]'.
get / http/1.0
...
...
...
I've obviously missed something, but I'm afraid I'm out of ideas. Any
suggestions most welcome.
Thanks in advance,
S.
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