java.lang.RuntimeException

GraphFactory could not instantiate this Graph implementation [com.thinkaurelius.titan.core.TitanFactory].

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Check if there is no nexus running. If not, delete sonatype-work/nexus/nexus.lock .


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  • Stack trace

    • java.lang.RuntimeException: GraphFactory could not instantiate this Graph implementation [com.thinkaurelius.titan.core.TitanFactory]. at com.tinkerpop.blueprints.GraphFactory.open(GraphFactory.java:50) at org.apache.falcon.metadata.MetadataMappingService.initializeGraphDB(MetadataMappingService.java:123) at org.apache.falcon.metadata.MetadataMappingService.init(MetadataMappingService.java:90) at org.apache.falcon.service.ServiceInitializer.initialize(ServiceInitializer.java:47) at org.apache.falcon.listener.ContextStartupListener.contextInitialized(ContextStartupListener.java:56) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:550) at org.mortbay.jetty.servlet.Context.startContext(Context.java:136) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:519) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.apache.falcon.util.EmbeddedServer.start(EmbeddedServer.java:57) at org.apache.falcon.FalconServer.main(FalconServer.java:118) Caused by: java.lang.reflect.InvocationTargetException 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 com.tinkerpop.blueprints.GraphFactory.open(GraphFactory.java:45) ... 15 more Caused by: java.lang.IllegalStateException: Need to set configuration value: root.storage.backend at com.google.common.base.Preconditions.checkState(Preconditions.java:172) at com.thinkaurelius.titan.diskstorage.configuration.ConfigOption.get(ConfigOption.java:158) at com.thinkaurelius.titan.diskstorage.configuration.BasicConfiguration.get(BasicConfiguration.java:56) at com.thinkaurelius.titan.diskstorage.Backend.getStorageManager(Backend.java:361) at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1275) at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:93) at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:73) ... 20 more

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