Hi List, we have recently upgraded our ES cluster (12 nodes, ~900GB data) from 0.90.9 to 1.4.2. We did a restart-upgrade, so backup data and then start the new ES version with the old data directories. Since then we're seeing lot of messages like "re-syncing mappings with cluster state for type…

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Stuck with "re-syncing mappings with cluster state for types ..." after upgrade 0.90.9 to 1.4.2