Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/2681#issuecomment-59458452
@davies: that exception that you hit is _very_ helpful; it looks like
you've been able to reproduce
[SPARK-3958](https://issues.apache.org/jira/browse/SPARK-3958) in local tests.
That JIRA describes some reports of cases where we've seen TorrentBroadcast
throw similar errors, but I've had a really hard time debugging that issue
because I've had trouble reliably reproducing this bug. Why do you think
`EMBED_SIZE` seems to affect the reliability of TorrentBroadcast? If it does,
that could be a valuable debugging clue for this issue.
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