erikerlandson commented on issue #24962: [SPARK-28149][K8S] Added variable to disable negative DNS caching URL: https://github.com/apache/spark/pull/24962#issuecomment-515192200 Hardcoding this behavior seems not quite right to me on general principles. However, the question would be "what if the DNS failure was 'real' instead of just a transitory startup artifact?" And maybe from a security point of view "what if the failure was part of some attack - trying to connect to something hostile?" In the benign case maybe not so bad. I'm less sure about a hypothetical vulnerability case. Thinking about the original [problem](https://issues.apache.org/jira/browse/SPARK-28149) I have a more basic question: I am wondering why it is not possible to reconfigure longer timeouts.
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