Sreenath Somarajapuram created TEZ-2777:
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Summary: DAG progress calculation in DAGImpl is incorrect
Key: TEZ-2777
URL: https://issues.apache.org/jira/browse/TEZ-2777
Project: Apache Tez
Issue Type: Bug
Reporter: Sreenath Somarajapuram
- getProgress function in org.apache.tez.dag.app.dag.impl.DAGImpl calculates
the progress by taking average of all vertex progresses, and vertexProgress is
average of task progresses.
- We are calculating average of averages, which wouldn't give the expected
results when total number of tasks in each vertices vary drastically.
- Guess it should be average progress of all tasks under a DAG, and not average
of vertex progresses.
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