Tech:CirrusSearch

Troubleshooting#

illegal_argument_exception: no mapping found for field [suggest]#

This was seen in T13277 and T13334 when checking Greylog for a failed search request. This error is related to #Primary index was expected to be an alias, and it can be fixed by fixing that as well.

Primary index was expected to be an alias#

This was first seen in T13334 when running CirrusSearch:UpdateSearchIndexConfig on a wiki exhibiting “illegal_argument_exception: no mapping found for field [suggest]”. Unfortunately, it is not yet known what causes this. For now, this can be worked around by manually deleting the wiki’s indices:

$ curl -X DELETE https://opensearch-mw.wikitide.net/testwiki_{content,general}

The output should be

{"acknowledged":true}{"acknowledged":true}

.

Afterwards, rebuild the search index from scratch. This would normally incur downtime for searching, but considering that searching is already broken, this doesn’t really matter. Instructions (copied from CirrusSearch README):

$ mwscript CirrusSearch:UpdateSearchIndexConfig testwiki --startOver
$ mwscript CirrusSearch:ForceSearchIndex testwiki

This problem was once recorded to have happened ever since CirrusSearch was enabled on the wiki (T13277#266442).

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