Zookeeper charm zkpeer-relation-changed issue.

[Kevin Monroe]

Hi Jose!

On Fri, Feb 23, 2018 at 8:53 AM, José Pekkarinen <
jose.pekkarinen at canonical.com> wrote:

>
>         The issue I get when executing the hook is:
>
> # juju-run unit-zookeeper-0 hooks/zkpeer-relation-changed
> Running reactive_handler_main for cuda.sh (test)
> Nothing to invoke
> End reactive_handler_main (test)
> Traceback (most recent call last):
>   File "hooks/zkpeer-relation-changed", line 19, in <module>
>     main()
>   File "/usr/local/lib/python3.5/dist-packages/charms/reactive/
> __init__.py",
> line 72, in main
>     bus.dispatch(restricted=restricted_mode)
>   File "/usr/local/lib/python3.5/dist-packages/charms/reactive/bus.py",
> line
> 367, in dispatch
>     _invoke(hook_handlers)
>   File "/usr/local/lib/python3.5/dist-packages/charms/reactive/bus.py",
> line
> 351, in _invoke
>     handler.invoke()
>   File "/usr/local/lib/python3.5/dist-packages/charms/reactive/bus.py",
> line
> 173, in invoke
>     self._action(*args)
> TypeError: changed() missing 1 required positional argument: 'self'
>
>         Which I presume it comes by the definition of
> check_cluster_changed, on the
> number of parameters, but I'm not that experienced with reactive charms to
> know. Can anyone shoot some thoughts on what the issue may be here?
>
>
The missing arg that it's complaining about happens because you're running
a relation hook without the relation context.  You might have also noticed
that zk-peer-joined and -departed would fail in the same way.  To do what
you want, you'll need to find the relation id for zkpeer:

$ sudo juju-run unit-zookeeper-0 'relation-ids zkpeer'
zkpeer:0

And then add the -r <id> option to your juju-run command:

$ sudo juju-run -r 0 unit-zookeeper-0 hooks/zkpeer-relation-joined
Running reactive_handler_main for cuda.sh (test)
Nothing to invoke
End reactive_handler_main (test)
Running reactive_handler_main for cuda.sh (test)
Will invoke: check_cuda_support
End reactive_handler_main (test)
Running reactive_handler_main for cuda.sh (invoke)
Invoking bash reactive handler: check_cuda_support
End reactive_handler_main (invoke)
Running reactive_handler_main for cuda.sh (test)
Nothing to invoke
End reactive_handler_main (test)

The -r will run your hook with the context from relation 0, which will be
the 'self' that was missing in your earlier attempt.

Hope that helps!
-Kevin

        Thanks!
>
>         José.
>
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