Jim Ferenczi 4df636b5ef Fix single shard scroll within a cluster with nodes in version >= 5.3 and <= 5.3 (#24512)
If a node in version >= 5.3 acts as a coordinating node during a scroll request that targets a single shard, the scroll may return the same documents over and over iff the targeted shard is hosted by a node with a version <= 5.3.
The nodes in this version will advance the scroll only if the search_type has been set to `query_and_fetch` though this search type has been removed in 5.3.
This change handles this situation by adding the removed search_type in the request that targets a node in version <= 5.3.
2017-05-09 09:14:17 +02:00
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