Fail start on invalid index metadata #37748
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Node started with node.data=false and node.master=false can no longer start if they have index metadata. This avoids resurrecting old indexes into the cluster and ensures metadata is cleaned out before re-purposing a node that was previously master or data node. Closes elastic#27073
henningandersen
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v7.0.0
:Distributed Coordination/Allocation
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When a node is repurposed to master/no-data or no-master/no-data, v7.x will not start (see elastic#37748 and elastic#37347). The `elasticsearch repurpose` tool can fix this by cleaning up the problematic data.
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Node started with node.data=false and node.master=false can no longer
start if they have index metadata. This avoids resurrecting old indexes
into the cluster and ensures metadata is cleaned out before
re-purposing a node that was previously master or data node.
Closes #27073