Comment 3 for bug 1884332

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Tim Penhey (thumper) wrote : Re: 2.7.7+2.7-5323b92 worker.uniter.jujuc config-get ERROR connection is shut down

This isn't a bug, but expected behaviour of Juju.

The charm wasn't able to execute the command because the API connection was dropped.
The API connection was dropped because the API server was restarting.
The API server was restarting because the state worker was restarting.
The state worker was restarting because mongo failed to respond to a ping.

This is how juju responds to errors in the underlying substrate. This is all expected behaviour, and not a bug.

When everything comes back on line, the uniter will rerun the hooks and they should continue like normal.

The root cause is mongo not getting the time it needs to run on the machine.