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From "Ying Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FALCON-1984) Provide proper hint and documentation if required titan storage backend is not configured in startup.properties
Date Thu, 02 Jun 2016 22:48:59 GMT

     [ https://issues.apache.org/jira/browse/FALCON-1984?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ying Zheng updated FALCON-1984:
-------------------------------
    Fix Version/s: 0.10

> Provide proper hint and documentation if required titan storage backend is not configured
in startup.properties
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: FALCON-1984
>                 URL: https://issues.apache.org/jira/browse/FALCON-1984
>             Project: Falcon
>          Issue Type: Bug
>            Reporter: Ying Zheng
>            Assignee: Ying Zheng
>             Fix For: 0.10
>
>
> We require the user to choose either HBase or BDB as titan storage backend, which is
not set by default in startup.properties. The current Falcon only shows the following error
in the log if the user doesn't configure the storage backend and start falcon with default
startup.properties. This is not intuitive for the user to understand the server start error.
Should provide proper hint and documentation.
> {code}
> 2016-05-26 02:24:07,419 ERROR - [main:] ~ Failed to initialize service org.apache.falcon.metadata.MetadataMappingService
(ServiceInitializer:49)
> 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
> {code}



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