TitanFactory.open error

[Rajam Suryanarayanan]

Hi all,

I am trying to connect to Titan through gremlin shell. But I am getting an exception during TitanFactory.open(). I am using the following from gremlin shell. 

gremlin> conf = new BaseConfiguration();

==>org.apache.commons.configuration.BaseConfiguration@3eba49df

gremlin> conf.setProperty("storage.backend","hbase");

==>null

gremlin> conf.setProperty("storage.hostname","127.0.0.1");

==>null

gremlin> conf.setProperty("storage.hbase.ext.hbase.zookeeper.property.clientPort","2181");

==>null

gremlin> conf.setProperty("storage.hbase.ext.zookeeper.znode.parent","/hbase-unsecure");

==>null

gremlin> conf.setProperty("storage.hbase.table","abc_titan");

==>null

gremlin> g = TitanFactory.open(conf);

Could not execute operation due to backend exception

Display stack trace? [yN] y

com.thinkaurelius.titan.core.TitanException: Could not execute operation due to backend exception

        at com.thinkaurelius.titan.diskstorage.util.BackendOperation.execute(BackendOperation.java:44)

        at com.thinkaurelius.titan.diskstorage.util.BackendOperation.execute(BackendOperation.java:144)

        at com.thinkaurelius.titan.diskstorage.configuration.backend.KCVSConfiguration.get(KCVSConfiguration.java:92)

        at com.thinkaurelius.titan.diskstorage.configuration.BasicConfiguration.isFrozen(BasicConfiguration.java:93)

        at com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration.<init>(GraphDatabaseConfiguration.java:1289)

        at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:93)

        at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:73)

        at com.thinkaurelius.titan.core.TitanFactory$open.call(Unknown Source)

        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)

        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)

        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)

        at groovysh_evaluate.run(groovysh_evaluate:84)

        at groovysh_evaluate$run.call(Unknown Source)

        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)

        at groovysh_evaluate$run.call(Unknown Source)

        at org.codehaus.groovy.tools.shell.Interpreter.evaluate(Interpreter.groovy:67)

        at org.codehaus.groovy.tools.shell.Interpreter$evaluate.call(Unknown Source)

        at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:152)

        at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:114)

        at org.codehaus.groovy.tools.shell.Shell$leftShift$0.call(Unknown Source)

        at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:88)

        at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)

        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.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)

        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)

        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1079)

        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)

        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:148)

        at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:100)

        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.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:272)

        at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)

        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:137)

        at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57)

        at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$run(InteractiveShellRunner.groovy)

        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.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)

        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)

        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1079)

        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:128)

        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:148)

        at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:66)

        at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.<init>(Console.java:70)

        at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.<init>(Console.java:83)

        at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.main(Console.java:87)

Can someone please help me with this.

Thanks and regards,

Rajam S

[Matthias Broecheler]

It's likely that hbase isn't running or requires a different configuration to connect to.

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