apache / apache/beam

MatchesFiles or MatchAll seems to return several times the same element

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bug files io P3 python
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Description

Hi team,

when I use MatcheFiles using wildcard and files located in a GCP bucket, the MatcheFiles transform returns several times (at least 2) the same file.

I have tried to follow the stack, and I can see that the MatchesAll is called twice when I run the pipeline on a debug project where a single element is present in the bucket.

But I am not good enough to say more than that. Sorry.

Best regards

Jerome

Imported from Jira [BEAM-7998](https://issues.apache.org/jira/browse/BEAM-7998). Original Jira may contain additional context.
Reported by: jerome.massot.78@gmail.com.

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