Github user rmetzger commented on the pull request:
https://github.com/apache/flink/commit/554b77bcd9ed66d57d99d4990774a43f35f6a835#commitcomment-12965859
Currently, flink-runtime has a dependency on Hadoop, so I can assume its
always available.
Even for a binary Flink release without build in Hadoop dependencies, we
would assume Hadoop to be present (from the classpath).
For a Flink release without any Hadoop, we can either remove this again or
use some reflection / fake hadoop class magic (added via maven) if needed.
But for now, I would like to have this in the code base because it helps
debugging user issues.
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