Java RMI port binding error in openshift

Question

I have developed a small Spring based web application to test Spring RMI. There I have created a simple service to generate a greeting message based on the input parameter and return it back to the client. My spring context file looks like this:

<bean id="registry" 
class="org.springframework.remoting.rmi.RmiRegistryFactoryBean">

  <property name="port" value="4777"/>

</bean>

<bean id="greetingService" class="com.greeting.GreetingServiceImpl" >
</bean>

<bean class="org.springframework.remoting.rmi.RmiServiceExporter"
      p:service-ref="greetingService"
      p:serviceName="greetingRmiService"
      p:serviceInterface="com.greeting.GreetingService"
      p:registry-ref="registry"
/>

First I have deployed this application in my local pc running tomcat server 7 and it deployed successfully. Then I have uploaded the war file of this application to Openshift tomcat 7 DIY server. But It doesn't deploy my application and gave this error in the log file.

SEVERE: Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'registry' defined in ServletCo ntext resource [/WEB-INF/applicationContext.xml]: Invocation of init method failed; nested exception is java.rmi.serve r.ExportException: Port already in use: 4777; nested exception is: java.net.BindException: Permission denied at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowir eCapableBeanFactory.java:1420) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireC apableBeanFactory.java:519) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCap ableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanReg istry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListab leBeanFactory.java:567) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractAppl icationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100) at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722) Caused by: java.rmi.server.ExportException: Port already in use: 4777; nested exception is: java.net.BindException: Permission denied at sun.rmi.transport.tcp.TCPTransport.listen(TCPTransport.java:328) at sun.rmi.transport.tcp.TCPTransport.exportObject(TCPTransport.java:236) at sun.rmi.transport.tcp.TCPEndpoint.exportObject(TCPEndpoint.java:411) at sun.rmi.transport.LiveRef.exportObject(LiveRef.java:147) at sun.rmi.server.UnicastServerRef.exportObject(UnicastServerRef.java:207) at sun.rmi.registry.RegistryImpl.setup(RegistryImpl.java:123) at sun.rmi.registry.RegistryImpl.(RegistryImpl.java:109) at java.rmi.registry.LocateRegistry.createRegistry(LocateRegistry.java:203) at org.springframework.remoting.rmi.RmiRegistryFactoryBean.getRegistry(RmiRegistryFactoryBean.java:267) at org.springframework.remoting.rmi.RmiRegistryFactoryBean.getRegistry(RmiRegistryFactoryBean.java:236) at org.springframework.remoting.rmi.RmiRegistryFactoryBean.getRegistry(RmiRegistryFactoryBean.java:193) at org.springframework.remoting.rmi.RmiRegistryFactoryBean.afterPropertiesSet(RmiRegistryFactoryBean.java:164) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAuto wireCapableBeanFactory.java:1477) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowir eCapableBeanFactory.java:1417) ... 26 more Caused by: java.net.BindException: Permission denied

How to fix this error and getting deployed this application in Openshift?

Thanks!

Answer 1

Port already in use: 4777

Use a port that isn't already in use.

OR make your sure application is really stopped before you restart it.

Answer 2

In OpenShift it is possible to bind to the internal IP with port range: 15000 - 35530. So, you can't use 4477. Use anything between 15000-35530. Also, understand that these are internal ports which means you can only use them from within application. Read more at https://www.openshift.com/kb/kb-e1038-i-cant-bind-to-a-port