Dmitry,

You need to return the updated component from start and stop. (See the 
relevant section of the documentation 
<https://github.com/stuartsierra/component/tree/component-0.3.2#creating-components>.)
 In 
your code, the start implementations are returning a keyword and the stop 
implementations are returning nil. (The value of a (println ,,,) expression 
is nil.)

I hope that helps,
Josh

P.S. You should be able to just use component/start; you shouldn’t need to 
use component/start-system explicitly.

On Tuesday, June 6, 2017 at 10:42:22 AM UTC-4, D.Bushenko wrote:
>
> Hi all,
>
> I've tried following the guide to the component and have two functions: 
> start-all and stop-all. The start-all works as expected, but stop-all fails 
> completely. Can anyone have a look at the code attached and help me figure 
> out what is it wrong there?
>
> Dmitry
>

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