Titan DB 0.5.4（titan-0.5.4-hadoop2），使用loadGraphSON（）导入/加载数据后出现异常

时间：2016-01-13 13:11:08

标签： cassandra graph-databases titan gremlin tinkerpop

我使用Titan DB（titan-0.5.4-hadoop2）而不是cassandra。

尝试使用JSON格式导出/导入数据。

保存操作成功发生，但在loadGraphSON（）命令之后，我收到异常。

代码：

g = TitanFactory.open('../conf/titan-db.properties')
titangraph[cassandra:[localhost]]
g.saveGraphSON('../Test1233.json')
g.commit()
g.loadGraphSON('../Test1233.json')

堆栈跟踪：

Not a single key: roles. Use addProperty instead
Display stack trace? [yN]
Not a single key: roles. Use addProperty instead
Display stack trace? [yN] y
java.lang.UnsupportedOperationException: Not a single key: roles. Use addProperty instead
  at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx.setProperty(StandardTitanTx.java:755)
  at com.thinkaurelius.titan.graphdb.vertices.AbstractVertex.setProperty(AbstractVertex.java:244)
  at com.thinkaurelius.titan.graphdb.vertices.AbstractVertex.setProperty(AbstractVertex.java:239)
  at com.tinkerpop.blueprints.util.wrappers.batch.BatchGraph$BatchVertex.setProperty(BatchGraph.java:492)
  at com.tinkerpop.blueprints.util.io.graphson.GraphSONUtility.vertexFromJson(GraphSONUtility.java:136)
  at com.tinkerpop.blueprints.util.io.graphson.GraphSONReader.inputGraph(GraphSONReader.java:158)
  at com.tinkerpop.blueprints.util.io.graphson.GraphSONReader.inputGraph(GraphSONReader.java:104)
  at com.tinkerpop.blueprints.util.io.graphson.GraphSONReader.inputGraph(GraphSONReader.java:88)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:497)
  at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
  at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
  at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite.invoke(StaticMetaMethodSite.java:43)
  at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite.call(StaticMetaMethodSite.java:88)
  at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
  at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
  at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)
  at com.tinkerpop.gremlin.groovy.loaders.GraphLoader$_load_closure14.doCall(GraphLoader.groovy:126)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:497)
  at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
  at org.codehaus.groovy.runtime.metaclass.ClosureMetaMethod.invoke(ClosureMetaMethod.java:80)
  at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoMetaMethodSiteNoUnwrapNoCoerce.invoke(PojoMetaMethodSite.java:271)
  at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:53)
  at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
  at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
  at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
  at groovysh_evaluate.run(groovysh_evaluate:84)
  at groovysh_evaluate$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:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:497)
  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:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:497)
  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:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:497)
  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)
gremlin>

1 个答案:

答案 0 :(得分：0)

您必须在Titan模式中使用基数设置或列表定义顶点属性。当您拥有集合属性而不是SINGLE属性时，需要使用addProperty()。这是你看到的错误。

正如Matthias在此post中所述，Blueprints 2.5.0提供的GraphSON实用程序不支持Titan的扩展架构模型。您正在调用的loadGraphSON() Gremlin步骤使用了BatchGraph，您可以在堆栈跟踪中看到。这可能是在最新的Titan 1.0版本中修复的，因此您应该考虑升级。

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