With the removal of doc types, must I reindex all the indices that use a named type?

Elastic Stack Elasticsearch
1

I am getting conflicting instructions regarding the removal of doc types. If my indices only having one doc type (but not named _doc), do I have to reindex all the indices before I upgrade, or will it upgrade and simply ignore the type?

I was getting some depreciation warning before, but if I look at the 7.0 Upgrade Assistant right now, it is saying that my cluster has no issue. I haven’t upgraded to 7.x mostly because of this so I want to make sure that I can do this before going further. If I had to reindex all the indices from a named doc type to_doc, it is a rather involved process so I would like to avoid that unless absolutely necessary.

Please advice. Thanks!

2

I believe indices created in Elasticsearch 6.x with a different type name will continue to work, but if you are creating new indices, e.g. time-based ones, these will need to have the standard type going forward. You may therefore need to update index templates and ingest config.

3

What happens if:

  • the index will continue to get new documents? Will that become an issue in 7.x and 8.x when the type is completely removed? What I have tried to do is indexing new documents with _doc but then ES complains that I have two doc types in the index.
4

Indices created in version 6.x will need to be reindexed and have the type adjusted before moving to 8.x, but it should work in 7.x. If you are using time-based indices it may make sense to add the major version number to the index name, e.g. test-7-* for indices created under version 7.x. This allows you to stop writing to indices (assumes you are not updating) created under older versions.

1 Like
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I see. In other words, I will have to do it regardless if I wanted to move to 8.x. Thanks for your reply. This is extremely helpful!

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