Add validation for supported index version on node join, restore, upgrade & open index#21830

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s1monw merged 12 commits intoelastic:masterfrom

s1monw:validate_indices_versions_on_join

Dec 1, 2016

Commits on Nov 28, 2016

Add validation for supported index version on node join
s1monw
committed

Commits on Nov 29, 2016

don't allow closed indices either
s1monw
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add more comments, inline method and add a more informative error message
s1monw
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Add more validation into several places that execute on the cluster state thread to ensure we don't have a race
s1monw
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