org.apache.tinkerpop.gremlin.driver.exception.ResponseException: Could not locate method: DefaultGraphTraversal.none()

[liming1010]

running janusgraph-examples\example-remotegraph\src\main\java\org\janusgraph\example\RemoteGraphApp.java one errer 'org.apache.tinkerpop.gremlin.driver.exception.ResponseException: Could not locate method: DefaultGraphTraversal.none()'
java.util.concurrent.CompletionException: org.apache.tinkerpop.gremlin.driver.exception.ResponseException: Could not locate method: DefaultGraphTraversal.none() at java.util.concurrent.CompletableFuture.reportJoin(CompletableFuture.java:375) at java.util.concurrent.CompletableFuture.join(CompletableFuture.java:1934) at org.apache.tinkerpop.gremlin.driver.ResultSet.one(ResultSet.java:107) at org.apache.tinkerpop.gremlin.driver.ResultSet$1.hasNext(ResultSet.java:159) at org.apache.tinkerpop.gremlin.driver.ResultSet$1.next(ResultSet.java:166) at org.apache.tinkerpop.gremlin.driver.ResultSet$1.next(ResultSet.java:153) at org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteTraversal$TraverserIterator.next(DriverRemoteTraversal.java:142) at org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteTraversal$TraverserIterator.next(DriverRemoteTraversal.java:127) at org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteTraversal.nextTraverser(DriverRemoteTraversal.java:108) at org.apache.tinkerpop.gremlin.process.remote.traversal.step.map.RemoteStep.processNextStart(RemoteStep.java:80) at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.next(AbstractStep.java:128) at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.next(AbstractStep.java:38) at org.apache.tinkerpop.gremlin.process.traversal.Traversal.iterate(Traversal.java:203) at org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal.iterate(GraphTraversal.java:2704) at org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal$Admin.iterate(GraphTraversal.java:179) at org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.DefaultGraphTraversal.iterate(DefaultGraphTraversal.java:48) ...

[TwelveNights]

Why was this closed? Did you resolve the issue somehow?

[vikram-ma]

I am facing same issue.

[FlorianHockmann]

This was closed by the author, @liming1010.
Which version of gremlin-driver are you guys using? Can you share a small code snippet that shows where the exception occurs?

I reopen this so we can investigate this and check whether it's a bug or not.

[vikram-ma]

gremlin driver version : 3.3.3

Here's the snippet
oldEdge = g.V(someVertex).outE('follows').next(); g.E(oldEdge).drop().iterate()

Here is the stack trace
vert.x-eventloop-thread-0] 2019-04-15T10:05:04.874+09:00 SEVERE [io.vertx.core.impl.ContextImpl] Unhandled exception java.util.concurrent.CompletionException: org.apache.tinkerpop.gremlin.driver.exception.ResponseException: Could not locate method: DefaultGraphTraversal.none() at java.util.concurrent.CompletableFuture.reportJoin(CompletableFuture.java:375) at java.util.concurrent.CompletableFuture.join(CompletableFuture.java:1934) at org.apache.tinkerpop.gremlin.driver.ResultSet.one(ResultSet.java:107) at org.apache.tinkerpop.gremlin.driver.ResultSet$1.hasNext(ResultSet.java:159) at org.apache.tinkerpop.gremlin.driver.ResultSet$1.next(ResultSet.java:166) at org.apache.tinkerpop.gremlin.driver.ResultSet$1.next(ResultSet.java:153) at org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteTraversal$TraverserIterator.next(DriverRemoteTraversal.java:142) at org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteTraversal$TraverserIterator.next(DriverRemoteTraversal.java:127) at org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteTraversal.nextTraverser(DriverRemoteTraversal.java:108) at org.apache.tinkerpop.gremlin.process.remote.traversal.step.map.RemoteStep.processNextStart(RemoteStep.java:80) at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.next(AbstractStep.java:128) at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.next(AbstractStep.java:38) at org.apache.tinkerpop.gremlin.process.traversal.Traversal.iterate(Traversal.java:203) at org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal.iterate(GraphTraversal.java:2694) at org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal$Admin.iterate(GraphTraversal.java:178) at org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.DefaultGraphTraversal.iterate(DefaultGraphTraversal.java:48) -- removed -- -- removed -- -- removed -- at nl.komponents.kovenant.AbstractPromise$success$1.invoke(promises-jvm.kt:357) at nl.komponents.kovenant.AbstractPromise$success$1.invoke(promises-jvm.kt:309) at uy.klutter.vertx.VertxCallbackDispatcher$offer$1.handle(KovenantVertxDispatcher.kt:45) at uy.klutter.vertx.VertxCallbackDispatcher$offer$1.handle(KovenantVertxDispatcher.kt:42) at io.vertx.core.impl.ContextImpl.executeTask(ContextImpl.java:320) at io.vertx.core.impl.EventLoopContext.lambda$executeAsync$0(EventLoopContext.java:38) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:462) at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:897) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:748)

[porunov]

@liming1010 @vikram-ma
About DefaultGraphTraversal.none() at java.util.concurrent.CompletableFuture.reportJoin: What Java version are you using?
Also, can you reproduce this issue with JanusGraph 0.5.2? JanusGraph versions lower then 0.5.x are not supported anymore