[TEZ-3983] VertexGroup ONE_TO_ONE edges do not produce the right graph

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Adrian Nicoara
• Created: 24/Aug/18 21:06
• Updated: 04/Oct/18 20:23

Description

A VertexGroup is described to act as a union of multiple vertices.

Consider a VertexGroup composed of 2 vertices, each with 2 tasks. If this is a union, then the expectation is that the VertexGroup has 4 tasks. A ONE_TO_ONE edge, to a downstream vertex, must then require that vertex to also have 4 tasks.

This is not the case, as evidenced by the following test.

Rather, what happens is that implementation (of unrolling the VertexGroup and directly creating edges between the components of the VertexGroup and the downstream vertices) is presented as the behavior.

Issue Links

• is required by: PIG-5363 Use 1-1 edge vertex group in union