Shards go unassigned and recovery mode

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1

Hi,

Lately one of my huge reindexing failed in the middle. It stopped after reindexing 1.5TB. Since then, when you try to reindex everytime, some shards gets unassigned and some goes on recovery mode, Cluster health goes RED. And it takes all day to recover all the shards back.

How do I avoid such things in future?

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