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https://issues.apache.org/jira/browse/BEAM-1858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15952427#comment-15952427
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Wesley Tanaka commented on BEAM-1858:
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suggestion: https://github.com/apache/beam/pull/2401/files
> improve error message when Create.of() is called with an empty iterator
> -----------------------------------------------------------------------
>
> Key: BEAM-1858
> URL: https://issues.apache.org/jira/browse/BEAM-1858
> Project: Beam
> Issue Type: Improvement
> Components: beam-model
> Reporter: Wesley Tanaka
> Assignee: Frances Perry
>
> The current error copy states:
> "java.lang.IllegalArgumentException: Elements must be provided to construct
> the default Create Coder. To Create an empty PCollection, either call
> Create.empty(Coder), or call 'withCoder(Coder)' on the result PTransform"
> This is potentially confusing for two reasons:
> 1. "the default Create Coder" assumes a high level of knowledge of how Create
> class works
> 2. since "Create" is a common word, it may not be immediately clear that
> Create is referring to org.apache.beam.sdk.transforms.Create as opposed to
> the possibility that there might be a compound noun in Beam model called
> "Create Coder"
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