INITIALIZING shard with REALLOCATED_REPLICA reason

Elastic Stack Elasticsearch
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Hi,

Our 5 node cluster (this is ES 7.10.1 on Ubuntu 18.04) went yellow last night and when we investigated it this morning, there is shard in the INITIALIZING state, with a "reason" of REALLOCATED_REPLICA. The shard seems to be a replica itself (there is a primary shard with the same number in that index). How do you get back to green? It seems like the shard could be deleted and a new replica created in its place, but I am not sure how to do that.

Thanks,
Chuck

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You should be able to get a bit more insight with https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-allocation-explain.html

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