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prevent DOCS_AND_FREQS_AND_POSITIONS Solr error #11140

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prevent DOCS_AND_FREQS_AND_POSITIONS Solr error #11140

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20 changes: 20 additions & 0 deletions doc/release-notes/10887-solr-field-types.md
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Expand Up @@ -73,6 +73,26 @@ Now start Solr.

8\. Reindex Solr

Note: these instructions are a little different than usual because we observed a strange error about `DOCS_AND_FREQS_AND_POSITIONS` when testing upgrades (see #11139 for details). Extra steps about explicitly clearing the index and reloading the core are included. If you run into trouble, as a last resort, you could reinstall Solr completely and then reindex.

Clear the Solr index:

```shell
curl http://localhost:8080/api/admin/index/clear
```

Make sure the Solr index is empty:

```shell
curl "http://localhost:8983/solr/collection1/select?rows=1000000&wt=json&indent=true&q=*%3A*"
```

Reload the Solr core:

```shell
curl "http://localhost:8983/solr/admin/cores?action=RELOAD&core=collection1"
```

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The above will work just fine.
But it may be even simpler to tell them to clear the existing index before updating the schema (in step 7., before stopping solr). Since changing the schema requires stopping and restarting, no need to reload the core as a separate step.

Just a thought - up to you; not a big deal either way.

Below is the simplest way to reindex Solr:

```shell
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