Get last update time for an index

[jasontedor]

@animageofmine

But the question still remains the same, is there a way to know when was the index updated?

Today this is not possible.

@animageofmine

I hope there is a way to find that out, doesn't seem that difficult of a problem to solve from what I understand about ES.

It's more difficult than it sounds. Since this is index metadata, the master would have to be responsible for tracking it. That means a master operation on every indexing request, which is entirely too expensive. If we relax the guarantees, we can remove the need for a master operation, but then there are consistency issues to deal with.