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From Hanifi Gunes <hgu...@maprtech.com>
Subject Re: epoll disconnections?
Date Fri, 25 Mar 2016 18:44:44 GMT
I am wondering what the issue and its manifestation was back then. Do we
have any JIRAs created for this before?


Thanks.
-Hanifi

On Fri, Mar 25, 2016 at 9:57 AM, Jacques Nadeau <jacques@dremio.com> wrote:

> Hey All,
>
> If I recall correctly, many months ago Sudheesh discovered that we were
> having instability in RPC connections in some situations due to bugs in the
> epoll implementation that are fixed in a later version of Netty (~4.0.31?).
> At the time, we shelved switching Netty because it also changed the memory
> caching behavior (same thread to all thread) which seemed like a high risk
> change. I thought that as part of this we decided the safest change was to
> disable epoll RPC in our distribution. However, reviewing drill-env, it
> doesn't look like we do this. See here [1].
>
> Thoughts?
>
> [1]
>
> https://github.com/apache/drill/blob/master/distribution/src/resources/drill-env.sh#L19
> --
> Jacques Nadeau
> CTO and Co-Founder, Dremio
>

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