Titan DB 0.5.4 (titan-0.5.4-hadoop2)，使用 loadGraphSON() importing/load 数据后出现异常
Titan DB 0.5.4 (titan-0.5.4-hadoop2) , Exception after importing/load data using loadGraphSON()
我在 cassandra 上使用 Titan DB (titan-0.5.4-hadoop2)。
正在尝试 export/import 格式为 JSON 的数据。
保存操作成功，但在执行 loadGraphSON() 命令后，出现异常。
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$leftShift[=12=].call(Unknown Source)
at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:88)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$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$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:272)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:137)
at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$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>
您必须在 Titan 模式中使用 Cardinality SET 或 LIST 定义一个顶点 属性。当你有一个集合 属性 而不是 SINGLE 属性 时，需要使用 addProperty()。这是您看到的错误。
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。正如您在堆栈跟踪中所见，您调用的 loadGraphSON() Gremlin 步骤在幕后使用了 BatchGraph。这可能已在最新的 Titan 版本 1.0 中修复，因此您应该考虑升级。
我在 cassandra 上使用 Titan DB (titan-0.5.4-hadoop2)。
正在尝试 export/import 格式为 JSON 的数据。
保存操作成功，但在执行 loadGraphSON() 命令后，出现异常。
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$leftShift[=12=].call(Unknown Source)
at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:88)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$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$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:272)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:52)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:137)
at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:57)
at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$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>
您必须在 Titan 模式中使用 Cardinality SET 或 LIST 定义一个顶点 属性。当你有一个集合 属性 而不是 SINGLE 属性 时，需要使用 addProperty()。这是您看到的错误。
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。正如您在堆栈跟踪中所见，您调用的 loadGraphSON() Gremlin 步骤在幕后使用了 BatchGraph。这可能已在最新的 Titan 版本 1.0 中修复，因此您应该考虑升级。