0250d554b6
This commit introduces the forget follower API. This API is needed in cases that unfollowing a following index fails to remove the shard history retention leases on the leader index. This can happen explicitly through user action, or implicitly through an index managed by ILM. When this occurs, history will be retained longer than necessary. While the retention lease will eventually expire, it can be expensive to allow history to persist for that long, and also prevent ILM from performing actions like shrink on the leader index. As such, we introduce an API to allow for manual removal of the shard history retention leases in this case. |
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