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Posted to dev@crunch.apache.org by "Tim van Heugten (JIRA)" <ji...@apache.org> on 2013/01/29 15:23:13 UTC
[jira] [Updated] (CRUNCH-155) Combining union and groupByKey causes
ClassCastException in DoNode during planning
[ https://issues.apache.org/jira/browse/CRUNCH-155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tim van Heugten updated CRUNCH-155:
-----------------------------------
Attachment: ConcatGroupFn.java
words.txt
FirstLetterKeyFn.java
UnionGbkTest.java
Junit test attached that illustrates the issue.
> 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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