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## What changes were proposed in this pull request? This PR changes the broadcast object in TorrentBroadcast from a strong reference to a weak reference. This allows it to be garbage collected even if the Dataset is held in memory. This is ok, because the broadcast object can always be re-read. ## How was this patch tested? Tested in Spark shell by taking a heap dump, full repro steps listed in https://issues.apache.org/jira/browse/SPARK-25998. Closes #22995 from bkrieger/bk/torrent-broadcast-weak. Authored-by: Brandon Krieger <bkrieger@palantir.com> Signed-off-by: Sean Owen <sean.owen@databricks.com> |
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