Tim van Heugten created CRUNCH-155:
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Summary: Combining union and groupByKey causes ClassCastException
in DoNode during planning
Key: CRUNCH-155
URL: https://issues.apache.org/jira/browse/CRUNCH-155
Project: Crunch
Issue Type: Bug
Affects Versions: 0.4.0
Reporter: Tim van Heugten
Priority: Critical
Attachments: ConcatGroupFn.java, FirstLetterKeyFn.java,
UnionGbkTest.java, words.txt
Create two pCollections.
Create an outputTarget for one of them.
Create a table from the pCollections
Union the tables
Group the union.
Process the grouped data into a PCollection.
Materialize and run the pipeline.
Causes: java.lang.ClassCastException:
org.apache.crunch.types.writable.WritableType cannot be cast to
org.apache.crunch.types.PGroupedTableType
Note: unioning first and creating a table later has the same CCE.
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