Hello,

what is the appropriate way to reset a orientdb graph in between junit 
testcases?

My @After cleanup method is currently invoking the following steps:

* OrientGraphFactory.close()
* Orient.instance().shutdown();
* Delete filesystem orientdb directory
* Orient.instance().startup();
* Create new OrientGraphFactory

For other graph databases it normally enough to just delete all edges and 
all vertices. Somehow this did not work for me and i got various NPE's:

// Underlying record for the element is null

java.lang.NullPointerException
> at 
> com.tinkerpop.blueprints.impls.orient.OrientElement.getProperty(OrientElement.java:273)
> at 
> com.tinkerpop.pipes.filter.PropertyFilterPipe.processNextStart(PropertyFilterPipe.java:28)
> at 
> com.tinkerpop.pipes.filter.PropertyFilterPipe.processNextStart(PropertyFilterPipe.java:13)
> at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89)
> at com.tinkerpop.pipes.util.AsPipe.processNextStart(AsPipe.java:42)
> at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89)
> at 
> com.tinkerpop.pipes.filter.BackFilterPipe.processNextStart(BackFilterPipe.java:31)
> at com.tinkerpop.pipes.AbstractPipe.next(AbstractPipe.java:89)
> at com.tinkerpop.pipes.util.Pipeline.next(Pipeline.java:115)
> at 
> com.syncleus.ferma.pipes.FermaGremlinPipeline.next(FermaGremlinPipeline.java:68)
> at com.tinkerpop.pipes.util.PipeHelper.counter(PipeHelper.java:107)
> at 
> com.tinkerpop.gremlin.java.GremlinPipeline.count(GremlinPipeline.java:1534)
> at 
> com.syncleus.ferma.traversals.AbstractTraversal.count(AbstractTraversal.java:111)
> at 
> com.gentics.graph.util.TraversalHelper.getPagedResult(TraversalHelper.java:41)
> at com.gentics.graph.core.SomeTest.testElement(SomeTest.java:63)
> 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:483)
> at 
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at 
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at 
> org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
> at 
> org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
> at 
> org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
> at 
> org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
> at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at 
> org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
> at 
> org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at 
> org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
> at 
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
> at 
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at 
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
> at 
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
> at 
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
> at 
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
>

Greetings

Johannes

PS: I know that the in memory version also exist but i don't want to use it 
at the moment.

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