Github user akohli commented on the pull request:
https://github.com/apache/spark/pull/13130#issuecomment-219750370
curious on a couple of things, firstly, you are using CacheBuilder with a
cache size of 1000, is that sufficient? Wouldn't it be better to catch an
exception or detect an error when a jobconf is added to the original map;
alternatively is this masking an issue that proper GC is not happening for
unreferenced cached configs?
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