elasticsearch/elasticsearch — pull request #6139 by imotov (2014-05-12 23:13:40+00:00)
Title: Add ability to snapshot replicating primary shards

This change adds a new cluster state that waits for the replication of a shard to finish before starting snapshotting process. Because this change adds a new snapshot state, it will not be possible to do rolling upgrade from 1.1 branch to 1.2 with snapshot is being executed in the cluster.

Closes #5531