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Posted to dev@tez.apache.org by Adrian Nicoara <ad...@microsoft.com.INVALID> on 2018/08/13 20:18:11 UTC

VertexGroup and ONE_TO_ONE edge

Hello,

Consider the following test:
https://github.com/apache/tez/blob/90c8195de0ddee9da3d4cd07519c8e287c85ad50/tez-api/src/test/java/org/apache/tez/dag/api/TestDAGVerify.java#L779-L831

For the VertexGroup uv23, we have a total of 4 tasks, 2 coming from v2, and 2 coming from v3.
This is connected to v5, which in the test, we assert has a total of 2 tasks, after DAG.verify runs (which infers parallelism for one to one edges).
However, isn't the expected number of tasks in v5 supposed to be 4, as uv23 acts as a union?

Thanks,
Adrian