Errors here only occur if Consul is not running when Nomad is restarted.
Errors here are only an issue if:
* Consul is being used but is down or misbehaving
* The executor is old (<0.6)
* The task has services
* The services hit a pre-0.6 consul.Syncer bug
If all of those conditions are met the pre-0.6 bugs will persist for
this task until Nomad is restarted.
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