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From Mesos Reviewbot Windows <revi...@mesos.apache.org>
Subject Re: Review Request 66863: Reduced likelihood of a stack overflow in libprocess socket send path.
Date Tue, 01 May 2018 03:02:15 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/66863/#review202185
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PASS: Mesos patch 66863 was successfully built and tested.

All the build artifacts available at: http://dcos-win.westus.cloudapp.azure.com/mesos-build/review/66863

- Mesos Reviewbot Windows


On April 30, 2018, 11:47 p.m., Benjamin Mahler wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/66863/
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> 
> (Updated April 30, 2018, 11:47 p.m.)
> 
> 
> Review request for mesos, Benjamin Hindman, Benno Evers, and Chun-Hung Hsiao.
> 
> 
> Bugs: MESOS-8594
>     https://issues.apache.org/jira/browse/MESOS-8594
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Currently, the socket send path is implemented using an asynchronous
> loop with callbacks. Without using `process::loop`, this pattern is
> prone to a stack overflow in the case that all asynchronous calls
> complete synchronously. This is possible with sockets if the socket
> is always ready for writing. Users have reported the crash in both
> MESOS-8594 and MESOS-8834, so the stack overflow is encountered in
> practice.
> 
> This patch updates the send path to leverage `process::loop`, which
> is supposed to prevent stack overflows in asynchronous loops. However,
> it is still possible for `process::loop` to stack overflow due to
> MESOS-8852. In practice, I expect that even without MESOS-8852 fixed,
> users won't see any stack overflows in the send path.
> 
> 
> Diffs
> -----
> 
>   3rdparty/libprocess/src/process.cpp 21931db5edd7ecf0f4620dba42a5521f48cd47a3 
> 
> 
> Diff: https://reviews.apache.org/r/66863/diff/2/
> 
> 
> Testing
> -------
> 
> make check
> 
> 
> Thanks,
> 
> Benjamin Mahler
> 
>


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