We have fully integrated our backend with JS:0.6 as recommended, including DB connection using new driver: GraphBinaryMessageSerializerV1.

All seams o work as before, except:

GraphTraversal<Vertex, ? extends Property<Object>> p = g.V(12345).properties("myproperty");

if (p.hasNext()) {...}

12:02:47.609 [https-jsse-nio-127.0.0.1-8443-exec-8] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] [175] - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.util.concurrent.CompletionException: org.apache.tinkerpop.gremlin.driver.exception.ResponseException: Error during serialization: java.lang.IllegalStateException] with root cause

org.apache.tinkerpop.gremlin.driver.exception.ResponseException: Error during serialization: java.lang.IllegalStateException

at org.apache.tinkerpop.gremlin.driver.Handler$GremlinResponseHandler.channelRead0(Handler.java:245)

at org.apache.tinkerpop.gremlin.driver.Handler$GremlinResponseHandler.channelRead0(Handler.java:200)

at io.shaded.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)

/.../

Above was, and still is fine on p.hasNext() with previously used GryoMessageSerializerV3d0 driver. Workaround we have is to use:

GraphTraversal<Vertex, ? extends Property<Object>> p = g.V(12345).values("myproperty");

if (p.hasNext()) {...}  // now is ok

Why above is failing, is the question....

Regards, Chris