DeathWatchNotification when stopping parent actor
<p>I have the following actor hierarchy:</p>
<p><a href="https://i.stack.imgur.com/aB1ns.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/aB1ns.png" alt="Actor hierarchy" /></a></p>
<p>The <code>receiver</code> is responsible for handling HTTP requests. When a request comes this actor creates a child actor <code>coordinator</code> (actually with a dynamic name).</p>
<p>After the <code>coordinator</code> finishes its work it executes <code>Context.Stop(Self)</code>.
This gracefully stops all the children, but then I get the following messages in the console:</p>
<blockquote>
<p>[INFO][23.05.2016 08:48:45][Thread 0013][akka://FSharpSystem/user/receiver/$b] Message DeathWatchNotification from akka://FSharpSystem/user/receiver/$b to akka://FSharpSystem/user/receiver/$b was not delivered. 1 dead letters encountered.</p>
<p>[INFO][23.05.2016 08:48:45][Thread 0013][akka://FSharpSystem/user/receiver/$b] Message DeathWatchNotification from akka://FSharpSystem/user/receiver/$b to akka://FSharpSystem/user/receiver/$b was not delivered. 2 dead letters encountered.</p>
<p>[INFO][23.05.2016 08:48:45][Thread 0013][akka://FSharpSystem/user/receiver/$b] Message DeathWatchNotification from akka://FSharpSystem/user/receiver/$b to akka://FSharpSystem/user/receiver/$b was not delivered. 3 dead letters encountered.</p>
</blockquote>
<p>Looks like all three actors send a <code>DeathWatchNotification</code> to the <code>coordinator</code> ($b is its dynamic name). I haven't subscribed to this notification and don't want to see it in the logs. How to disable this behavior (preferably in F#)?</p>
<p>P.S. Here is a <a href="https://gist.github.com/M0ns1gn0r/45ca2e0e22069c1ce38b394b235b0566" rel="nofollow noreferrer">Gist with the sample code</a>.</p>