Hi,

Do you mean that the only difference  between the first and the second script is the presence of the closing double quote? I see the stacktrace is from Gremlin Server: did you use Gremlin Console to fire the query? What happens if you make a GLV/bytecode connection instead of a connection for groovy scripts, that is using:

g = traversal().withRemote(DriverRemoteConnection.using("localhost",8182,"g"))

Best wishes,    Marc

Op vrijdag 27 november 2020 om 19:05:24 UTC+1 schreef ouy...@...:

query with gremlin script:  "g.E().hasLabel('L2_LINK').has('prop1', 'prop1-value')"

the returned result is expected and correct.

but query with gremlin script: "g.E().hasLabel('L2_LINK').has('prop1', 'prop1-value')

throws NullPointerException.

the exception stack info is as follow:

2020-11-27 12:07:35,227 WARN  [gremlin-server-exec-10] AbstractEvalOpProcessor.java:311 - Exception processing a script on request [RequestMessage{, requestId=cb1f0ab6-cee6-47c4-bbc1-196f27b1b14c, op='eval', processor='', args={gremlin=g.E().hasLabel('L2_LINK').has('prop1', 'prop1-value'), batchSize=64}}].

java.lang.NullPointerException

        at org.janusgraph.graphdb.util.ElementHelper.getValues(ElementHelper.java:41)

        at org.janusgraph.graphdb.query.condition.PredicateCondition.evaluate(PredicateCondition.java:68)

        at org.janusgraph.graphdb.query.condition.And.evaluate(And.java:55)

        at org.janusgraph.graphdb.query.graph.GraphCentricQuery.matches(GraphCentricQuery.java:153)

        at org.janusgraph.graphdb.query.QueryProcessor.lambda$getFilterIterator$2(QueryProcessor.java:133)

        at com.google.common.collect.Iterators$7.computeNext(Iterators.java:652)

        at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)

        at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)

        at org.janusgraph.graphdb.query.ResultSetIterator.nextInternal(ResultSetIterator.java:54)

        at org.janusgraph.graphdb.query.ResultSetIterator.next(ResultSetIterator.java:67)

        at org.janusgraph.graphdb.query.ResultSetIterator.next(ResultSetIterator.java:28)

        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.google.common.collect.Iterators$5.hasNext(Iterators.java:547)

        at java.util.Spliterators$IteratorSpliterator.tryAdvance(Spliterators.java:1811)

        at java.util.Spliterators$1Adapter.hasNext(Spliterators.java:681)

        at org.janusgraph.graphdb.util.MultiDistinctOrderedIterator.hasNext(MultiDistinctOrderedIterator.java:75)

        at org.apache.tinkerpop.gremlin.process.traversal.step.map.GraphStep.processNextStart(GraphStep.java:149)

        at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.hasNext(AbstractStep.java:143)

        at org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal.hasNext(DefaultTraversal.java:197)

        at org.apache.tinkerpop.gremlin.server.op.AbstractOpProcessor.handleIterator(AbstractOpProcessor.java:146)

        at org.apache.tinkerpop.gremlin.server.op.AbstractEvalOpProcessor.lambda$evalOpInternal$5(AbstractEvalOpProcessor.java:264)

        at org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.lambda$eval$0(GremlinExecutor.java:278)

        at java.util.concurrent.FutureTask.run(FutureTask.java:266)

        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

        at java.util.concurrent.FutureTask.run(FutureTask.java:266)

        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

        at java.lang.Thread.run(Thread.java:748)

and the problem is reproducible,  is it a bug?

enviroment:

janusgraph version: 0.5.2

backend cassandra version: 3.11