[GitHub] flink issue #5927: [FLINK-8237] [BucketingSink] Better error message added

[fhueske]

Github user fhueske commented on the issue:

    https://github.com/apache/flink/pull/5927
  
    Thanks for the PR @pavel-shvetsov-git!
    I've left a suggestion to improve the error message.
    Afterwards the PR should be good to merge.


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