apache / apache/beam

java.lang.ArrayIndexOutOfBoundsException

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bug core java P3
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Description

Getting `java.lang.ArrayIndexOutOfBoundsException` when calling `ProcessContext.output()` in a `DoFn`

*Details:*
After some debugging, it seems like it's trying to encode the output `Row` using the input `Row`'s `Schema`.

Attached minimum example, test input file (in.txt) and log.txt

Imported from Jira [BEAM-6657](https://issues.apache.org/jira/browse/BEAM-6657). Original Jira may contain additional context.
Reported by: derp.

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