[TINKERPOP-1587] Gremlin Server Subgraph Cardinality Not Respected

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.2.3
• Fix Version/s: 3.2.4
• Component/s: io
• Assignee: Stephen Mallette
• Reporter: Michael Margitus
• Created: 19/Dec/16 17:13
• Updated: 29/Dec/16 10:40
• Resolved: 29/Dec/16 10:40

Description

The subgraph traversal step does not respect the cardinality of properties when executed on a graph remotely accessed from Gremlin Server. When queried, only one value of a multi-value property is returned. The following Java-based traversal illustrates the issue on The Crew graph. Below g is a Graph Traversal Source created using the withRemote() method on the EmptyGraph.

GraphTraversal<Edge, Object> traversal =g.E().hasLabel("develops").subgraph("subgraph").cap("subgraph");

TinkerGraph subgraph = (TinkerGraph)traversal.next();
GraphTraversalSource sg = subgraph.traversal();

GraphTraversal<Vertex, Object> locationTraversal = sg.V(1L).values("location");
while (locationTraversal.hasNext()) {
    System.out.println(locationTraversal.next());
}

This traversal should return four locations

 {id=1, name=[marko], location=[san diego, santa cruz, brussels, santa fe], label=person} 

however it only returns santa fe.