dufing upgrade 7.4.2 -> 7.9 I received an error "failed shard on node [GnAJTEqpTeyawpDyUli4Aw]: failed to create index, failure IllegalArgumentException[unknown setting [index.hidden] please check that any required plugins are installed, or check the breaking changes documentation for removed setti…

resolved by i do not know why this has happended byt I could just delete the shards and problem resolved. DELETE ilm-history-2-000001 [image] Ilm-history-2-000001 UNASSIGNED, primary shard for this replica is not yet active Elasticsearch Please I need critical help wit…

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Unassigned ilm-history shard cluster in RED state

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Petr.Simik (Petr Simik) August 31, 2020, 5:49pm 2

resolved by
i do not know why this has happended byt
I could just delete the shards and problem resolved.

DELETE ilm-history-2-000001

Topic		Replies	Views
Ilm-history-2-000001 UNASSIGNED, primary shard for this replica is not yet active Elasticsearch	4	1426	August 31, 2020
Failed Reroute unassigned index Elasticsearch docker	3	394	October 27, 2022
Unassigned Shard Elasticsearch	4	713	January 3, 2020
Cluster Red - unallocated shards in a index Elasticsearch	3	1845	January 30, 2018
UNASSIGNED replicas after reroute allocate_stale_primary Elasticsearch	1	445	March 18, 2022

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Unassigned ilm-history shard cluster in RED state

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