Eclipse Mars: Startup Error: UnknownHostException

Question

I am getting this error at Eclipse Mars Startup:

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STATUS

pluginId            org.eclipse.rse.core
pluginVersion       3.3.100.201407181907
code                0
severity            4
message             Unexpected Exception
fingerprint         cce9c498

Exception:java.net.UnknownHostException: amrit-Latitude-E5450: amrit-Latitude-E5450: Name or service not known at java.net.InetAddress.getLocalHost(InetAddress.java:1473) at org.eclipse.rse.core.RSECorePlugin.getLocalMachineName(RSECorePlugin.java:265) at org.eclipse.rse.core.RSEPreferencesManager.getDefaultPrivateSystemProfileName(RSEPreferencesManager.java:358) at org.eclipse.rse.core.RSEPreferencesManager.initDefaults(RSEPreferencesManager.java:337) at org.eclipse.rse.internal.core.RSEPreferenceInitializer.initializeDefaultPreferences(RSEPreferenceInitializer.java:23) at org.eclipse.core.internal.preferences.PreferenceServiceRegistryHelper$1.run(PreferenceServiceRegistryHelper.java:300) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.preferences.PreferenceServiceRegistryHelper.runInitializer(PreferenceServiceRegistryHelper.java:303) at org.eclipse.core.internal.preferences.PreferenceServiceRegistryHelper.applyRuntimeDefaults(PreferenceServ iceRegistryHelper.java:131) at org.eclipse.core.internal.preferences.PreferencesService.applyRuntimeDefaults(PreferencesService.java:368) at org.eclipse.core.internal.preferences.DefaultPreferences.applyRuntimeDefaults(DefaultPreferences.java:221) at org.eclipse.core.internal.preferences.DefaultPreferences.load(DefaultPreferences.java:274) at org.eclipse.core.internal.preferences.EclipsePreferences.create(EclipsePreferences.java:409) at org.eclipse.core.internal.preferences.EclipsePreferences.internalNode(EclipsePreferences.java:670) at org.eclipse.core.internal.preferences.DefaultPreferences.node(DefaultPreferences.java:147) at org.eclipse.core.internal.preferences.legacy.PreferenceForwarder.getDefaultPreferences(PreferenceForwarder.java:134) at org.eclipse.core.internal.preferences.legacy.PreferenceForwarder.getInt(PreferenceForwarder.java:488) at org.eclipse.rse.logging.Logger.initialize(Logger.java:249) at org.eclipse.rse.logging.Logger.(Logger.java:135) at org.eclipse.rse.logging. LoggerFactory.getLogger(LoggerFactory.java:45) at org.eclipse.rse.core.RSECorePlugin.getLogger(RSECorePlugin.java:392) at org.eclipse.rse.internal.core.RSEInitJob.(RSEInitJob.java:133) at org.eclipse.rse.internal.core.RSEInitJob.(RSEInitJob.java:65) at org.eclipse.rse.core.RSECorePlugin.waitForInitCompletion(RSECorePlugin.java:142) at org.eclipse.rse.internal.ui.RSEUIInitJob.run(RSEUIInitJob.java:32) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.net.UnknownHostException: amrit-Latitude-E5450: Name or service not known at java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:-2) 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) at org.eclipse.rse.core.RSECorePlugin.getLocalMachineName(RSECorePlugin.java:265) at org.eclipse.rse.core.RSEPreferencesManager.getDefaultPrivateSystemProfileName(RSEPrefe rencesManager.java:358) at org.eclipse.rse.core.RSEPreferencesManager.initDefaults(RSEPreferencesManager.java:337) at org.eclipse.rse.internal.core.RSEPreferenceInitializer.initializeDefaultPreferences(RSEPreferenceInitializer.java:23) at org.eclipse.core.internal.preferences.PreferenceServiceRegistryHelper$1.run(PreferenceServiceRegistryHelper.java:300) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.preferences.PreferenceServiceRegistryHelper.runInitializer(PreferenceServiceRegistryHelper.java:303) at org.eclipse.core.internal.preferences.PreferenceServiceRegistryHelper.applyRuntimeDefaults(PreferenceServiceRegistryHelper.java:131) at org.eclipse.core.internal.preferences.PreferencesService.applyRuntimeDefaults(PreferencesService.java:368) at org.eclipse.core.internal.preferences.DefaultPreferences.applyRuntimeDefaults(DefaultPreferences.java:221) at org.eclipse.core.internal.preferences.DefaultPreferences.load(DefaultPreferences.java:274) at org.eclipse.core.internal.preferences.EclipsePreferences.create(EclipsePreferences.java:409) at org.eclipse.core.internal.preferences.EclipsePreferences.internalNode(EclipsePreferences.java:670) at org.eclipse.core.internal.preferences.DefaultPreferences.node(DefaultPreferences.java:147) at org.eclipse.core.internal.preferences.legacy.PreferenceForwarder.getDefaultPreferences(PreferenceForwarder.java:134) at org.eclipse.core.internal.preferences.legacy.PreferenceForwarder.getInt(PreferenceForwarder.java:488) at org.eclipse.rse.logging.Logger.initialize(Logger.java:249) at org.eclipse.rse.logging.Logger.(Logger.java:135) at org.eclipse.rse.logging.LoggerFactory.getLogger(LoggerFactory.java:45) at org.eclipse.rse.core.RSECorePlugin.getLogger(RSECorePlugin.java:392) at org.eclipse.rse.internal.core.RSEInitJob.(RSEInitJob.java:133) at org.eclipse.rse.internal.core.RSEInitJob.(RSEInitJob.java:65) at org.eclipse.rse.core.RSECorePlugin.waitForInitCompletion(RSECorePlugin.java:142) at org.e clipse.rse.internal.ui.RSEUIInitJob.run(RSEUIInitJob.java:32) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

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REPORT

anonymousId         efee7f97-68b2-4225-b42c-3dcc4515ef81
name                Amrit
email               amrit.sarkar@snapdeal.com
comment             
eclipseBuildId      4.5.0.I20150603-2000
eclipseProduct      org.eclipse.epp.package.jee.product
javaRuntimeVersion  1.7.0_79-b14
osgiWs              gtk
osgiOs              Linux
osgiOsVersion       3.16.0
osgiArch            x86_64
logMessage          false
ignoreSimilar       false

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BUNDLES

name                org.eclipse.core.jobs
version             3.7.0.v20150330-2103

name                org.eclipse.core.runtime
version             3.11.0.v20150405-1723

name                org.eclipse.rse.core
version             3.3.100.201407181907

name                org.eclipse.rse
version             3.5.0.201403100950

name                org.eclipse.rse.ui
version             3.3.100.201503112018

Anyone with any Clue?

Answer 1

I had the same problem and I added the hostname within the hosts file (/etc/hosts) at the end of the line that says "127.0.0.1 localhost". You should end with something like this "127.0.0.1 localhost hostname" and then the error has gone.

I identified the solution from the post: InetAddress.getLocalHost() throws UnknownHostException

Please try with the tip I mention or try using the solutions proposed in the mentioned post.