Elastic Search update from 7.16.2 to 8.13.3

Elastic Stack Elasticsearch
1

I updated the Elasticsearch from 7.16.2 version to 8.13.3

After that, i am not able to see any previous document

2

Hi @nishant_goyal,

Welcome! Did you upgrade to 7.17 first as per the upgrade guide? Did you use the upgrade assistant, and if so did it flag any issues?

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no i directly update to 8.3.3 version and all the Indexes showing incompatibility

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To confirm, all the indices were showing as incompatible rather than compatible? Did you reindex or delete them?

Do you have a snapshot of your indices? It's not something I've done myself, but I wonder if you can use the archive capability to access those indices.