Witold Jędrzejewski created SPARK-16683:
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Summary: Group by does not work after multiple joins of the same
dataframe
Key: SPARK-16683
URL: https://issues.apache.org/jira/browse/SPARK-16683
Project: Spark
Issue Type: Bug
Components: Optimizer
Affects Versions: 1.6.2, 1.6.1, 1.6.0, 2.0.0
Environment: local and yarn
Reporter: Witold Jędrzejewski
When I join a dataframe, group by a field from it, then join it again by
different field and group by field from it, second aggregation does not trigger.
The detailed description and minimal example, workaround and possible cause are
in the attachment, in a form of Zeppelin notebook.
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