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java.lang.NullPointerException: 	at com.thinkaurelius.titan.graphdb.database.EdgeSerializer.parseRelation(EdgeSerializer.java:116)	at com.thinkaurelius.titan.graphdb.database.EdgeSerializer.readRelation(EdgeSerializer.java:60)	at com.thinkaurelius.titan.graphdb.transaction.RelationConstructor.readRelation(RelationConstructor.java:61)	at com.thinkaurelius.titan.graphdb.transaction.RelationConstructor$1$1.next(RelationConstructor.java:46)	at com.thinkaurelius.titan.graphdb.transaction.RelationConstructor$1$1.next(RelationConstructor.java:34)	at com.thinkaurelius.titan.graphdb.query.LimitAdjustingIterator.next(LimitAdjustingIterator.java:80)	at com.google.common.collect.Iterators$7.computeNext(Iterators.java:651)	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)	at com.thinkaurelius.titan.graphdb.query.ResultMergeSortIterator.nextInternal(ResultMergeSortIterator.java:59)	at com.thinkaurelius.titan.graphdb.query.ResultMergeSortIterator.next(ResultMergeSortIterator.java:49)	at com.thinkaurelius.titan.graphdb.query.ResultSetIterator.nextInternal(ResultSetIterator.java:41)	at com.thinkaurelius.titan.graphdb.query.ResultSetIterator.(ResultSetIterator.java:30)	at com.thinkaurelius.titan.graphdb.query.QueryProcessor.iterator(QueryProcessor.java:57)	at com.thinkaurelius.titan.graphdb.vertices.AbstractVertex.properties(AbstractVertex.java:160)	at org.apache.tinkerpop.gremlin.structure.util.ElementHelper.vertexPropertyValueMap(ElementHelper.java:500)	at org.apache.tinkerpop.gremlin.process.traversal.step.map.PropertyMapStep.map(PropertyMapStep.java:54)	at org.apache.tinkerpop.gremlin.process.traversal.step.map.PropertyMapStep.map(PropertyMapStep.java:36)	at org.apache.tinkerpop.gremlin.process.traversal.step.map.MapStep.processNextStart(MapStep.java:37)	at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.hasNext(AbstractStep.java:140)	at org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal.hasNext(DefaultTraversal.java:117)	at org.apache.tinkerpop.gremlin.console.Console$_closure3.doCall(Console.groovy:205)	at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:292)	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1016)	at org.codehaus.groovy.tools.shell.Groovysh.setLastResult(Groovysh.groovy:441)	at org.codehaus.groovy.tools.shell.Groovysh.execute(Groovysh.groovy:185)	at org.codehaus.groovy.tools.shell.Shell.leftShift(Shell.groovy:119)	at org.codehaus.groovy.tools.shell.ShellRunner.work(ShellRunner.groovy:94)	at org.codehaus.groovy.tools.shell.InteractiveShellRunner.super$2$work(InteractiveShellRunner.groovy)	at sun.reflect.GeneratedMethodAccessor33.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1207)	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:130)	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:150)	at org.codehaus.groovy.tools.shell.InteractiveShellRunner.work(InteractiveShellRunner.groovy:123)	at org.codehaus.groovy.tools.shell.ShellRunner.run(ShellRunner.groovy:58)	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:498)	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1207)	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:130)	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:150)	at org.codehaus.groovy.tools.shell.InteractiveShellRunner.run(InteractiveShellRunner.groovy:82)	at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215)	at org.apache.tinkerpop.gremlin.console.Console.(Console.groovy:144)	at org.codehaus.groovy.vmplugin.v7.IndyInterface.selectMethod(IndyInterface.java:215)	at org.apache.tinkerpop.gremlin.console.Console.main(Console.groovy:303)