[OSGi][Service] Creating a service and calling it from other bundle

Hi,

We are going to create a service, export it and import in another bundle. If you did not create a simple bundle yet, follow the post [OSGi] Hello World from OSGi | Create your first OSGi Bundle

We are going to create a classic ECHO service. Whatever is given to the service is ECHOed back to us.

After you are done creating a simple bundle HelloFromOSGi. Follow the steps below.

[Liferay][Tomcat] Permission Denied Errors in Catalina.out

Hi,

I have seen some people struggling with permission errors when running Liferay. Errors like below..

	Jan 29, 2015 7:03:44 AM org.apache.catalina.core.StandardWrapperValve invoke
	SEVERE: Servlet.service() for servlet [default] in context with path [/welcome-theme] threw exception
	java.io.FileNotFoundException: /opt/coe/liferay-portal-7.0-ce-m2/tomcat-7.0.42/work/Catalina/localhost/welcome-theme/aggregate/http_/welcome-theme/css/main.cssbrowserId=firefox&themeId=welcome_WAR_welcometheme&minifierType=css&languageId=en_US&b=7000&t=1413544248000_E_CONTENT_TYPE (Permission denied)
	at java.io.FileOutputStream.open(Native Method)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
	at com.liferay.portal.util.FileImpl.write(FileImpl.java:960)
	at com.liferay.portal.util.FileImpl.write(FileImpl.java:939)
	at com.liferay.portal.util.FileImpl.write(FileImpl.java:934)
	at com.liferay.portal.kernel.util.FileUtil.write(FileUtil.java:437)

view raw catalina.out hosted with ❤ by GitHub

The main cause for these errors is that server was started with a user lets say A having permissions(like root) and then server was stopped and started by a user lets say B with limited permissions. Now entries in temp and several other places are owned by A and when B tries to start/restart server B is unable to access those files and get permission denied errors.

[OSGi] Hello World from OSGi | Create your first OSGi Bundle

Hi Friends,

This post will guide you to create a very very simple Hello World bundle using OSGi. We will use Eclipse for this purpose.

Few simple steps to follow.

Step 1. Create a new project in Eclipse. Open New > Project

[Eclipse] Workbench has not been created yet. Error while creating OSGi modules.

Hi,

It was my first day with OSGi bundles and I got an error.. Workbench has not been created yet. If you have the same error, please follow the steps below to resolve it.

	Root exception:
	java.lang.IllegalStateException: Workbench has not been created yet.
	at org.eclipse.ui.PlatformUI.getWorkbench(PlatformUI.java:93)
	at org.eclipse.wst.jsdt.debug.internal.ui.JavaScriptDebugUIPlugin.start(JavaScriptDebugUIPlugin.java:65)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
	at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.setBundleSL(StartLevelManager.java:670)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:435)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
	!ENTRY org.eclipse.wst.jsdt.ui 4 0 2015-01-25 13:05:20.290
	!MESSAGE FrameworkEvent ERROR
	!STACK 0
	org.osgi.framework.BundleException: Exception in org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin.start() of bundle org.eclipse.wst.jsdt.ui.
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:734)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
	at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.setBundleSL(StartLevelManager.java:670)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:435)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
	Caused by: java.lang.IllegalStateException: Workbench has not been created yet.
	at org.eclipse.ui.PlatformUI.getWorkbench(PlatformUI.java:93)
	at org.eclipse.wst.jsdt.internal.ui.javaeditor.ASTProvider.install(ASTProvider.java:282)
	at org.eclipse.wst.jsdt.internal.ui.javaeditor.ASTProvider.<init>(ASTProvider.java:273)
	at org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin.getASTProvider(JavaScriptPlugin.java:625)
	at org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin.start(JavaScriptPlugin.java:339)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
	... 9 more
	Root exception:
	java.lang.IllegalStateException: Workbench has not been created yet.
	at org.eclipse.ui.PlatformUI.getWorkbench(PlatformUI.java:93)
	at org.eclipse.wst.jsdt.internal.ui.javaeditor.ASTProvider.install(ASTProvider.java:282)
	at org.eclipse.wst.jsdt.internal.ui.javaeditor.ASTProvider.<init>(ASTProvider.java:273)
	at org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin.getASTProvider(JavaScriptPlugin.java:625)
	at org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin.start(JavaScriptPlugin.java:339)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
	at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.setBundleSL(StartLevelManager.java:670)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:435)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
	!ENTRY org.eclipse.wst.ws.explorer 4 0 2015-01-25 13:05:20.292
	!MESSAGE FrameworkEvent ERROR
	!STACK 0
	org.osgi.framework.BundleException: Exception in org.eclipse.wst.ws.internal.explorer.plugin.ExplorerPlugin.start() of bundle org.eclipse.wst.ws.explorer.
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:734)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
	at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.setBundleSL(StartLevelManager.java:670)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:435)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
	Caused by: java.lang.IllegalStateException: Workbench has not been created yet.
	at org.eclipse.ui.PlatformUI.getWorkbench(PlatformUI.java:93)
	at org.eclipse.wst.ws.internal.explorer.LaunchWizardTask.getInstance(LaunchWizardTask.java:34)
	at org.eclipse.wst.ws.internal.explorer.plugin.ExplorerPlugin.start(ExplorerPlugin.java:75)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
	... 9 more
	Root exception:
	java.lang.IllegalStateException: Workbench has not been created yet.
	at org.eclipse.ui.PlatformUI.getWorkbench(PlatformUI.java:93)
	at org.eclipse.wst.ws.internal.explorer.LaunchWizardTask.getInstance(LaunchWizardTask.java:34)
	at org.eclipse.wst.ws.internal.explorer.plugin.ExplorerPlugin.start(ExplorerPlugin.java:75)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
	at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.setBundleSL(StartLevelManager.java:670)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:435)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)

view raw osgi_workbench.log hosted with ❤ by GitHub

Step 1. Go to MANIFEST.MF and right click on it and then navigate to Run As > Run Configuration.

[Liferay] java.net.UnknownHostException | Unknown Host Exception Liferay

Hi,

I got this exception on a fresh Linux machine. It was clear that Liferay was not able to find the hostname entries properly. Solution was simple. Just needed to add hostname in hosts file. Here is the exception log.

	09:47:03,776 WARN [localhost-startStop-1][network:133] failed to resolve local host, fallback to loopback
	java.net.UnknownHostException: ravipc: ravipc
	at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
	at org.elasticsearch.common.network.NetworkUtils.<clinit>(NetworkUtils.java:54)
	at org.elasticsearch.http.netty.NettyHttpServerTransport.<init>(NettyHttpServerTransport.java:143)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at org.elasticsearch.common.inject.DefaultConstructionProxyFactory$1.newInstance(DefaultConstructionProxyFactory.java:54)
	at org.elasticsearch.common.inject.ConstructorInjector.construct(ConstructorInjector.java:86)
	at org.elasticsearch.common.inject.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:98)
	at org.elasticsearch.common.inject.FactoryProxy.get(FactoryProxy.java:52)
	at org.elasticsearch.common.inject.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:45)
	at org.elasticsearch.common.inject.InjectorImpl.callInContext(InjectorImpl.java:837)
	at org.elasticsearch.common.inject.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:42)
	at org.elasticsearch.common.inject.Scopes$1$1.get(Scopes.java:57)
	at org.elasticsearch.common.inject.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:45)
	at org.elasticsearch.common.inject.SingleParameterInjector.inject(SingleParameterInjector.java:42)
	at org.elasticsearch.common.inject.SingleParameterInjector.getAll(SingleParameterInjector.java:66)
	at org.elasticsearch.common.inject.ConstructorInjector.construct(ConstructorInjector.java:85)
	at org.elasticsearch.common.inject.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:98)
	at org.elasticsearch.common.inject.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:45)
	at org.elasticsearch.common.inject.InjectorImpl.callInContext(InjectorImpl.java:837)
	at org.elasticsearch.common.inject.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:42)
	at org.elasticsearch.common.inject.Scopes$1$1.get(Scopes.java:57)
	at org.elasticsearch.common.inject.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:45)
	at org.elasticsearch.common.inject.InjectorBuilder$1.call(InjectorBuilder.java:200)
	at org.elasticsearch.common.inject.InjectorBuilder$1.call(InjectorBuilder.java:193)
	at org.elasticsearch.common.inject.InjectorImpl.callInContext(InjectorImpl.java:830)
	at org.elasticsearch.common.inject.InjectorBuilder.loadEagerSingletons(InjectorBuilder.java:193)
	at org.elasticsearch.common.inject.InjectorBuilder.injectDynamically(InjectorBuilder.java:175)
	at org.elasticsearch.common.inject.InjectorBuilder.build(InjectorBuilder.java:110)
	at org.elasticsearch.common.inject.Guice.createInjector(Guice.java:93)
	at org.elasticsearch.common.inject.Guice.createInjector(Guice.java:70)
	at org.elasticsearch.common.inject.ModulesBuilder.createInjector(ModulesBuilder.java:59)
	at org.elasticsearch.node.internal.InternalNode.<init>(InternalNode.java:192)
	at org.elasticsearch.node.NodeBuilder.build(NodeBuilder.java:159)
	at org.elasticsearch.node.NodeBuilder.node(NodeBuilder.java:166)
	at com.liferay.portal.search.elasticsearch.connection.EmbeddedElasticsearchConnection.createClient(EmbeddedElasticsearchConnection.java:89)
	at com.liferay.portal.search.elasticsearch.connection.BaseElasticsearchConnection.initialize(BaseElasticsearchConnection.java:101)
	at com.liferay.portal.search.elasticsearch.connection.EmbeddedElasticsearchConnection.activate(EmbeddedElasticsearchConnection.java:72)
	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.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:236)
	at org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:37)
	at org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:613)
	at org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:496)
	at org.apache.felix.scr.impl.helper.ActivateMethod.invoke(ActivateMethod.java:149)
	at org.apache.felix.scr.impl.manager.ImmediateComponentManager.createImplementationObject(ImmediateComponentManager.java:239)
	at org.apache.felix.scr.impl.manager.ImmediateComponentManager.createComponent(ImmediateComponentManager.java:119)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$Registered.getService(AbstractComponentManager.java:1694)
	at org.apache.felix.scr.impl.manager.ImmediateComponentManager.getService(ImmediateComponentManager.java:667)
	at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse$1.run(ServiceFactoryUse.java:212)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse.factoryGetService(ServiceFactoryUse.java:210)
	at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse.getService(ServiceFactoryUse.java:111)
	at org.eclipse.osgi.internal.serviceregistry.ServiceConsumer$2.getService(ServiceConsumer.java:45)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:496)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.getService(ServiceRegistry.java:461)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.getService(BundleContextImpl.java:619)
	at org.apache.felix.scr.impl.helper.BindMethod.getServiceObject(BindMethod.java:563)
	at org.apache.felix.scr.impl.manager.DependencyManager.prebind(DependencyManager.java:1091)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.collectDependencies(AbstractComponentManager.java:768)
	at org.apache.felix.scr.impl.manager.ImmediateComponentManager.getService(ImmediateComponentManager.java:636)
	at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse$1.run(ServiceFactoryUse.java:212)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse.factoryGetService(ServiceFactoryUse.java:210)
	at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse.getService(ServiceFactoryUse.java:111)
	at org.eclipse.osgi.internal.serviceregistry.ServiceConsumer$2.getService(ServiceConsumer.java:45)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:496)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.getService(ServiceRegistry.java:461)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.getService(BundleContextImpl.java:619)
	at org.apache.felix.scr.impl.helper.BindMethod.getServiceObject(BindMethod.java:563)
	at org.apache.felix.scr.impl.manager.DependencyManager.prebind(DependencyManager.java:1091)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.collectDependencies(AbstractComponentManager.java:768)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:1492)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:550)
	at org.apache.felix.scr.impl.manager.DependencyManager.serviceAdded(DependencyManager.java:333)
	at org.apache.felix.scr.impl.manager.DependencyManager.serviceChanged(DependencyManager.java:159)
	at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:109)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:914)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:862)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:801)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:127)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:225)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.registerService(BundleContextImpl.java:464)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:660)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:644)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerComponentService(AbstractComponentManager.java:688)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:1481)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:550)
	at org.apache.felix.scr.impl.manager.DependencyManager.serviceAdded(DependencyManager.java:333)
	at org.apache.felix.scr.impl.manager.DependencyManager.serviceChanged(DependencyManager.java:159)
	at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:109)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:914)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:862)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:801)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:127)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:225)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.registerService(BundleContextImpl.java:464)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:660)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:644)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerComponentService(AbstractComponentManager.java:688)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:1481)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:550)
	at org.apache.felix.scr.impl.manager.DependencyManager.serviceAdded(DependencyManager.java:333)
	at org.apache.felix.scr.impl.manager.DependencyManager.serviceChanged(DependencyManager.java:159)
	at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:109)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:914)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:862)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:801)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:127)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:225)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.registerService(BundleContextImpl.java:464)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:660)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:644)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerComponentService(AbstractComponentManager.java:688)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:1481)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:550)
	at org.apache.felix.scr.impl.manager.DependencyManager.serviceAdded(DependencyManager.java:333)
	at org.apache.felix.scr.impl.manager.DependencyManager.serviceChanged(DependencyManager.java:159)
	at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:109)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:914)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:862)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:801)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:127)
	at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:225)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.registerService(BundleContextImpl.java:464)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:660)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:644)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerComponentService(AbstractComponentManager.java:688)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:1481)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:550)
	at org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:261)
	at org.apache.felix.scr.impl.config.ImmediateComponentHolder.enableComponents(ImmediateComponentHolder.java:328)
	at org.apache.felix.scr.impl.BundleComponentActivator.initialize(BundleComponentActivator.java:158)
	at org.apache.felix.scr.impl.BundleComponentActivator.<init>(BundleComponentActivator.java:113)
	at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:261)
	at org.apache.felix.scr.impl.Activator.loadAllComponents(Activator.java:199)
	at org.apache.felix.scr.impl.Activator.start(Activator.java:108)
	at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:771)
	at org.eclipse.osgi.internal.framework.BundleContextImpl$3.run(BundleContextImpl.java:1)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:764)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:721)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:941)
	at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:318)
	at org.eclipse.osgi.container.Module.doStart(Module.java:571)
	at org.eclipse.osgi.container.Module.start(Module.java:439)
	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1582)
	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1562)
	at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1533)
	at org.eclipse.osgi.container.SystemModule.startWorker(SystemModule.java:242)
	at org.eclipse.osgi.container.Module.doStart(Module.java:571)
	at org.eclipse.osgi.container.Module.start(Module.java:439)
	at org.eclipse.osgi.container.SystemModule.start(SystemModule.java:172)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:392)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:411)
	at org.eclipse.osgi.launch.Equinox.start(Equinox.java:115)
	at com.liferay.portal.bootstrap.ModuleFrameworkImpl.startFramework(ModuleFrameworkImpl.java:415)
	at com.liferay.portal.module.framework.ModuleFrameworkUtilAdapter.startFramework(ModuleFrameworkUtilAdapter.java:98)
	at com.liferay.portal.spring.context.PortalContextLoaderListener.contextInitialized(PortalContextLoaderListener.java:236)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
	at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:656)
	at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1635)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
	Caused by: java.net.UnknownHostException: ravipc
	at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
	at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
	at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
	... 183 more

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And the solution here.. On linux open /etc/hosts file and make an entry.

> sudo vim /etc/hosts

	127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
	::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
	127.0.0.1 ravipc

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That's it. Pretty easy. :) Hope this helps someone.