Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/2787
One thought on the `HttpConnectionParams.setSoKeepalive` - we had issues
with Hadoop pulling in a wrong version of that class.
I think we shaded it in Flink's Hadoop dependency, but it might be that EMR
puts is own Hadoop in the classpath, bringing the wrong class back.
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