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Looks great Alexandra, I wonder if the following would be simpler:

(1) Leave shutdown and shutdownFramework untouched.
(2) Add Slave::signaled(int signal) that LOGs as you've done, but dispatches to 
the existing 'shutdown' with a message saying "Received SIGUSR1 signal".

This is similar to what we did for authentication where we call:
  shutdown(UPID(), "Master refused authentication");



Another suggestion:

Do we want to use SA_SIGINFO to receive a siginfo_t? That way, we could pass 
the uid of the sender into the slave's signal handler, at which point we could 
use os::user to try to log who send the signal.

- Ben Mahler


On May 22, 2014, 3:37 p.m., Alexandra Sava wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/21379/
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> 
> (Updated May 22, 2014, 3:37 p.m.)
> 
> 
> Review request for mesos and Ben Mahler.
> 
> 
> Bugs: MESOS-544
>     https://issues.apache.org/jira/browse/MESOS-544
> 
> 
> Repository: mesos-git
> 
> 
> Description
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> 
> First phase: Mesos-slave support for "node drain" 
>                                                                               
>                   
> This phase handles the shutdown of the slave, triggered by SIGUSR1 signal:
> * implement a signal handler which is invoked when SIGUSR1 signal is issued
> * the signal handler will call the 'shutdown' method from the Slave class, 
> which  shuts down all the frameworks and executors that run on the slave.
> 
> In the next phase, the slave will send an unregistration request to the 
> master in order to overcome the lag of the health check timer (75 sec).  
> 
> 
> Diffs
> -----
> 
>   src/slave/slave.hpp 769bd00f1464c9935416f044fd834e2187d83a6e 
>   src/slave/slave.cpp a4b9570c0b4f1b56180888ef975add4c8c3cbee7 
> 
> Diff: https://reviews.apache.org/r/21379/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Alexandra Sava
> 
>

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