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From Aniket Bhatnagar <>
Subject Re: Very long pause/hang at end of execution
Date Sun, 06 Nov 2016 13:36:29 GMT
In order to know what's going on, you can study the thread dumps either
from spark UI or from any other thread dump analysis tool.


On Sun, Nov 6, 2016 at 1:31 PM Michael Johnson
<> wrote:

> I'm doing some processing and then clustering of a small dataset (~150
> MB). Everything seems to work fine, until the end; the last few lines of my
> program are log statements, but after printing those, nothing seems to
> happen for a long time...many minutes; I'm not usually patient enough to
> let it go, but I think one time when I did just wait, it took over an hour
> (and did eventually exit on its own). Any ideas on what's happening, or how
> to troubleshoot?
> (This happens both when running locally, using the localhost mode, as well
> as on a small cluster with four 4-processor nodes each with 15GB of RAM; in
> both cases the executors have 2GB+ of RAM, and none of the inputs/outputs
> on any of the stages is more than 75 MB...)
> Thanks,
> Michael

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