Problem binding port 50500 with WCM Alfresco 2.9B

[ghernando]

Hello,

When I try to start the virtual tomcat, I'm seeing some errors in the log.
There seems to be a problem binding port 50500.  It's a clean machine.  I don't have anything using port 50500.
But I do see 50500 referenced in the standard tomcat distributed with the alfresco/tomcat bundle.
Do I need to change 50500 to something else in the virtual tomcat configuration files – I see quite a few files where it is referenced?
The virtual tomcat's configuration already has changed standard tomcat ports like 8080 to 8180, so I thought that the configuration within virtual tomcat on download is probably intentional.

Any idea about what could be wrong?

Thanks

Thu Mar 13 06:31:50 PDT 2008 Starting Alfresco …
06:33:43,052 WARN  [org.springframework.remoting.rmi.RmiRegistryFactoryBean] Could not detect RMI registry - creating new one
06:33:48,069 ERROR [org.springframework.web.context.ContextLoader] Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'serverConnector' defined in class path resource [alfresco/core-services-context.xml]: Invocation of init method failed; nested exception is java.io.IOException: Cannot bind to URL [rmi://localhost:50500/alfresco/jmxrmi]: javax.naming.NameAlreadyBoundException: alfresco/jmxrmi [Root exception is java.rmi.AlreadyBoundException: alfresco/jmxrmi]
Caused by: java.io.IOException: Cannot bind to URL [rmi://localhost:50500/alfresco/jmxrmi]: javax.naming.NameAlreadyBoundException: alfresco/jmxrmi [Root exception is java.rmi.AlreadyBoundException: alfresco/jmxrmi]
    at javax.management.remote.rmi.RMIConnectorServer.newIOException(RMIConnectorServer.java:804)
    at javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:417)
    at org.springframework.jmx.support.ConnectorServerFactoryBean.afterPropertiesSet(ConnectorServerFactoryBean.java:168)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1118)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1085)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:429)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:250)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:141)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:247)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:161)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:270)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:346)
    at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:156)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3764)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4216)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:825)
    at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:714)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490)
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
    at org.apache.catalina.core.StandardService.start(StandardService.java:448)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: javax.naming.NameAlreadyBoundException: alfresco/jmxrmi [Root exception is java.rmi.AlreadyBoundException: alfresco/jmxrmi]
    at com.sun.jndi.rmi.registry.RegistryContext.bind(RegistryContext.java:122)
    at com.sun.jndi.toolkit.url.GenericURLContext.bind(GenericURLContext.java:208)
    at javax.naming.InitialContext.bind(InitialContext.java:400)
    at javax.management.remote.rmi.RMIConnectorServer.bind(RMIConnectorServer.java:625)
    at javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:412)
    … 38 more
Caused by: java.rmi.AlreadyBoundException: alfresco/jmxrmi
    at sun.rmi.registry.RegistryImpl.bind(RegistryImpl.java:123)
    at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
    at sun.rmi.transport.Transport$1.run(Transport.java:159)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)
    at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
    at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
    at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:359)
    at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)
    at com.sun.jndi.rmi.registry.RegistryContext.bind(RegistryContext.java:120)
    … 42 more
06:33:48,071 ERROR [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/alfresco]] Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'serverConnector' defined in class path resource [alfresco/core-services-context.xml]: Invocation of init method failed; nested exception is java.io.IOException: Cannot bind to URL [rmi://localhost:50500/alfresco/jmxrmi]: javax.naming.NameAlreadyBoundException: alfresco/jmxrmi [Root exception is java.rmi.AlreadyBoundException: alfresco/jmxrmi]
Caused by: java.io.IOException: Cannot bind to URL [rmi://localhost:50500/alfresco/jmxrmi]: javax.naming.NameAlreadyBoundException: alfresco/jmxrmi [Root exception is java.rmi.AlreadyBoundException: alfresco/jmxrmi]
    at javax.management.remote.rmi.RMIConnectorServer.newIOException(RMIConnectorServer.java:804)
    at javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:417)
    at org.springframework.jmx.support.ConnectorServerFactoryBean.afterPropertiesSet(ConnectorServerFactoryBean.java:168)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1118)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1085)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:429)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:250)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:141)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:247)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:161)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:270)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:346)
    at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:156)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3764)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4216)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:825)
    at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:714)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490)
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
    at org.apache.catalina.core.StandardService.start(StandardService.java:448)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: javax.naming.NameAlreadyBoundException: alfresco/jmxrmi [Root exception is java.rmi.AlreadyBoundException: alfresco/jmxrmi]
    at com.sun.jndi.rmi.registry.RegistryContext.bind(RegistryContext.java:122)
    at com.sun.jndi.toolkit.url.GenericURLContext.bind(GenericURLContext.java:208)
    at javax.naming.InitialContext.bind(InitialContext.java:400)
    at javax.management.remote.rmi.RMIConnectorServer.bind(RMIConnectorServer.java:625)
    at javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:412)
    … 38 more
Caused by: java.rmi.AlreadyBoundException: alfresco/jmxrmi
    at sun.rmi.registry.RegistryImpl.bind(RegistryImpl.java:123)
    at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
    at sun.rmi.transport.Transport$1.run(Transport.java:159)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)
    at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
    at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
    at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:359)
    at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)
    at com.sun.jndi.rmi.registry.RegistryContext.bind(RegistryContext.java:120)
    … 42 more
06:33:48,073 ERROR [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/alfresco]] Exception sending context initialized event to listener instance of class org.alfresco.web.app.ContextListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'serverConnector' defined in class path resource [alfresco/core-services-context.xml]: Invocation of init method failed; nested exception is java.io.IOException: Cannot bind to URL [rmi://localhost:50500/alfresco/jmxrmi]: javax.naming.NameAlreadyBoundException: alfresco/jmxrmi [Root exception is java.rmi.AlreadyBoundException: alfresco/jmxrmi]
Caused by: java.io.IOException: Cannot bind to URL [rmi://localhost:50500/alfresco/jmxrmi]: javax.naming.NameAlreadyBoundException: alfresco/jmxrmi [Root exception is java.rmi.AlreadyBoundException: alfresco/jmxrmi]
    at javax.management.remote.rmi.RMIConnectorServer.newIOException(RMIConnectorServer.java:804)
    at javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:417)
    at org.springframework.jmx.support.ConnectorServerFactoryBean.afterPropertiesSet(ConnectorServerFactoryBean.java:168)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1118)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1085)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:429)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:250)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:141)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:247)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:161)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:270)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:346)
    at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:156)
    at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3764)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4216)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:825)
    at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:714)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490)
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
    at org.apache.catalina.core.StandardService.start(StandardService.java:448)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: javax.naming.NameAlreadyBoundException: alfresco/jmxrmi [Root exception is java.rmi.AlreadyBoundException: alfresco/jmxrmi]
    at com.sun.jndi.rmi.registry.RegistryContext.bind(RegistryContext.java:122)
    at com.sun.jndi.toolkit.url.GenericURLContext.bind(GenericURLContext.java:208)
    at javax.naming.InitialContext.bind(InitialContext.java:400)
    at javax.management.remote.rmi.RMIConnectorServer.bind(RMIConnectorServer.java:625)
    at javax.management.remote.rmi.RMIConnectorServer.start(RMIConnectorServer.java:412)
    … 38 more
Caused by: java.rmi.AlreadyBoundException: alfresco/jmxrmi
    at sun.rmi.registry.RegistryImpl.bind(RegistryImpl.java:123)
    at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
    at sun.rmi.transport.Transport$1.run(Transport.java:159)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
    at java.lang.Thread.run(Thread.java:619)
    at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
    at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
    at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:359)
    at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)
    at com.sun.jndi.rmi.registry.RegistryContext.bind(RegistryContext.java:120)
    … 42 more
06:33:54,603 INFO  [org.alfresco.repo.domain.schema.SchemaBootstrap] Schema managed by database dialect org.hibernate.dialect.MySQLInnoDBDialect.
06:33:55,952 INFO  [org.alfresco.repo.domain.schema.SchemaBootstrap] No changes were made to the schema.
06:34:02,731 INFO  [org.alfresco.repo.admin.ConfigurationChecker] The Alfresco root data directory ('dir.root') is: /var/lib/alfresco/alf_data
06:34:02,759 INFO  [org.alfresco.repo.admin.patch.PatchExecuter] Checking for patches to apply …
06:34:03,669 INFO  [org.alfresco.repo.module.ModuleServiceImpl] Found 0 module(s).
06:34:08,919 ERROR [org.alfresco.smb.protocol] Failed to get local domain/workgroup name, using default of WORKGROUP
06:34:08,919 ERROR [org.alfresco.smb.protocol] (This may be due to firewall settings or incorrect <broadcast> setting)
06:34:09,553 INFO  [org.alfresco.service.descriptor.DescriptorService] Alfresco JVM - v1.6.0_03-b05; maximum heap size 506.313MB
06:34:09,554 INFO  [org.alfresco.service.descriptor.DescriptorService] Alfresco started (Community Network): Current version 2.9.0 (B 683) schema 116 - Installed version 2.9.0 (B 683) schema 116
Thu Mar 13 06:58:21 PDT 2008 Stopping Alfresco …

[jottley]

Make sure that the hosts file references your host name and the ip/ localhost ip

for example:

127.0.0.1   localhost heidegger

List both localhost and the actual host name of the machine.

[torsten_e]

I have the same problem

my hosts. file

127.0.0.1  localhost  server8
‍‍‍

[erinn]

I tried the /etc/hosts tricks and that did me no good, and after a long time digging around for this I found that NFS was bound to that particular port, so if you are running an NFS server on the same system that you are trying to setup Alfresco on beware. A 'netstat -an | grep 50500' will tell you whether the port is bound by something else. Interestingly lsof -i :50500 didn't come up with anything because there were no open files associated with that port.

I realize this post is from months ago, but just in case anyone else comes across this issue.

-Erinn

[matthewboh]

I've just spent the better part of two days trying to install Alfresco - I have the same problem.  Is there a work around?

Thanks

[jottley]

If your local NFS server is always using that port (50500) you can modify alfresco-shared.properties.

[matthewboh]

It turns out that this error was caused by alfresco having some troubles finding the shared libraries.  I found the solution here

http://wiki.alfresco.com/wiki/Install_Tomcat6