I have a mini cluster of two nodes running 90.6 Both contain data, one is the master. I have written two custom faceting plugins against 90.6. the first worked against 90.3 and I have upgraded it the second is brand new and was written against 90.6 Both plugins work well and pass all unit tests…

Upgraded to 90.6 : RemoteTransportException: Failed to deserialize response of type [org.elasticsearch.search.query.QuerySearchResult]

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Upgraded to 90.6 : RemoteTransportException: Failed to deserialize response of type [org.elasticsearch.search.query.QuerySearchResult]