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amazon-archives / dynamodb-janusgraph-storage-backend

The Amazon DynamoDB Storage Backend for JanusGraph
Apache License 2.0
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g = TitanFactory.open(conf) throws an error #4

Closed oren closed 9 years ago

oren commented 9 years ago

I am trying to Load a subset of the Marvel Universe Social Grap and stack on step 5. I assume that by 'Titan DynamoDB Storage Backend in the Gremlin shell' you mean the bin/german.sh command that comes with the installation of titan. let me know if that's not the case.

~/projects/titan-0.5.4-hadoop2 bin/gremlin.sh

\,,,/
(o o)
-----oOOo-(_)-oOOo-----
18:35:17 WARN  org.apache.hadoop.util.NativeCodeLoader  - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
gremlin> conf = new BaseConfiguration()
==>org.apache.commons.configuration.BaseConfiguration@398f3f27
gremlin> conf.setProperty("storage.backend", "com.amazon.titan.diskstorage.dynamodb.DynamoDBStoreManager")
==>null
gremlin> conf.setProperty("storage.dynamodb.client.endpoint", "http://localhost:4567")
==>null
gremlin> conf.setProperty("index.search.backend", "elasticsearch")
==>null
gremlin> conf.setProperty("index.search.directory", "/tmp/searchindex")
==>null
gremlin> conf.setProperty("index.search.elasticsearch.client-only", "false")
==>null
gremlin> conf.setProperty("index.search.elasticsearch.local-mode", "true")
==>null
gremlin> conf.setProperty("index.search.elasticsearch.inteface", "NODE")
==>null
gremlin> g = TitanFactory.open(conf)
Could not find implementation class: com.amazon.titan.diskstorage.dynamodb.DynamoDBStoreManager
Display stack trace? [yN]
java.lang.IllegalArgumentException: Could not find implementation class: com.amazon.titan.diskstorage.dynamodb.DynamoDBStoreManager
        at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:47)
        at com.thinkaurelius.titan.diskstorage.Backend.getImplementationClass(Backend.java:421)
        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)
        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:78)
        at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.<init>(Console.java:91)
        at com.thinkaurelius.titan.hadoop.tinkerpop.gremlin.Console.main(Console.java:95)
Caused by: java.lang.ClassNotFoundException: com.amazon.titan.diskstorage.dynamodb.DynamoDBStoreManager
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:191)
        at com.thinkaurelius.titan.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:42)
        ... 52 more
amcp commented 9 years ago

If you just want to use the gremlin shell, the DynamoDB Storage Backend for Titan's pom.xml file includes a start-gremlin profile. In your git checkout of the storage backend, if you issue the mvn test -Pstart-gremlin profile after having issued the mvn test -Pstart-dynamodb-local command in another shell, then you will be able to interact with gremlin without running into ClassNotFound errors. In the vanilla distribution of Titan server, the JAR of the DynamoDB Storage Backend for Titan are not included, so that is why you get the errors.

amcp commented 9 years ago

If you want to get a complete server directory with the DynamoDB Storage Backend for Titan dependencies, you can run the command at step 3 here in the Rexster installation steps and that will put everything where it needs to be in the ext directory. Or you can download Titan server bundled with the DynamoDB Storage Backend for Titan from the links in the Titan/Rexster CloudFormation documentation.

oren commented 9 years ago

works now. i think i skipped step 4. thanks!