Github user squito commented on the pull request:
https://github.com/apache/spark/pull/10045#issuecomment-161061431
I think this change is fine as a "safe" change to make immediately. I have
been hesitant to change the default behavior, I figured there was some reason
it was turned off so far. But, fwiw, I always advice customers with large
clusters to use this, and to crank that value up a lot more. 5s seems like a
better default, though, without too aggressively changing the existing behavior.
I don't think this solves the larger problem of having an improved
blacklisting mechanism, but I think that discussion goes elsewhere, assuming
you want to stick with this simple change here.
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