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Home/ Questions/Q 8746957
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Editorial Team
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Editorial Team
Asked: June 13, 20262026-06-13T12:16:41+00:00 2026-06-13T12:16:41+00:00

I try those to requests: http://localhost:8080/solr/core/select/?q=title:mario&start=0&rows=10&wt=xml works fine http://localhost:8080/solr/core/select/?q=title:mario&start=0&rows=10&wt=json doesn’t work! returns HTTP Status

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I try those to requests:

http://localhost:8080/solr/core/select/?q=title:mario&start=0&rows=10&wt=xml works fine

http://localhost:8080/solr/core/select/?q=title:mario&start=0&rows=10&wt=json doesn’t work!
returns

HTTP Status 400 – undefined field tags

type Status report

message undefined field tags

description The request sent by the client was syntactically incorrect (undefined field tags).

Can anyone advise please?

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  1. Editorial Team
    Editorial Team
    2026-06-13T12:16:42+00:00Added an answer on June 13, 2026 at 12:16 pm

    I solved the issue.
    For people who may encounter the same weird behaviour, how I got there:

    I changed the data-dir property to another directory (a data-dir of another SOLR core, with different database, fields..)

    Just re-indexing the index solved the issue.

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