Make yarn-common services robust
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Key: MAPREDUCE-4014
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4014
Project: Hadoop Map/Reduce
Issue Type: Sub-task
Components: mrv2
Affects Versions: 0.23.1, 0.24.0
Reporter: Steve Loughran
Assignee: Steve Loughran
Review the yarn common services ({{CompositeService}},
{{AbstractLivelinessMonitor}} and make their service startup _and especially
shutdown_ more robust against out-of-lifecycle invocation and partially
complete initialization.
Write tests for these where possible.
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