What does this mean? I am seeing this after upgrading elastic from 1.7.1. to 2.2.0 Really appreciate any help [xx][[xx][4]] IndexShardRecoveryException[failed to fetch index version after copying it over]; nested: CorruptIndexException[Hit unexpected exception while reading segment infos (reso…

URGENT: IndexShardRecoveryException

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URGENT: IndexShardRecoveryException