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https://issues.apache.org/jira/browse/SOLR-10494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Trey Grainger updated SOLR-10494:
---------------------------------
Attachment: SOLR-10494
Initial patch, with all unit tests broken by the change now passing. Haven't
changed to indent=on by default yet or removed setting of json explicitly in
various places yet, though, as I've been trying to change one variable at a
time to minimize complications.
For some reason, switching to json by default has caused ant precommit to
complain about resource leak in about 60 places. I'm not sure what is causing
these at the moment, but want to address that first before adding any
additional changes to the patch.
> Switch Solr's Default Response Type from XML to JSON
> ----------------------------------------------------
>
> Key: SOLR-10494
> URL: https://issues.apache.org/jira/browse/SOLR-10494
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: master (7.0)
> Reporter: Trey Grainger
> Priority: Minor
> Fix For: master (7.0)
>
> Attachments: SOLR-10494
>
>
> Solr's default response format is still XML, despite the fact that Solr has
> supported the JSON response format for over a decade, developer mindshare has
> clearly shifted toward JSON over the years, and most modern/competing systems
> also use JSON format now by default.
> In fact, Solr's admin UI even explicitly adds wt=json to the request (by
> default in the UI) to override the default of wt=xml, so Solr's Admin UI
> effectively has a different default than the API.
> We have now introduced things like the JSON faceting API, and the new more
> modern /V2 apis assume JSON for the areas of Solr they cover, so clearly
> we're moving in the direction of JSON anyway.
> I'd like propose that we switch the default response writer to JSON (wt=json)
> instead of XML for Solr 7.0, as this seems to me like the right direction and
> a good time to make this change with the next major version.
> Based upon feedback from the Lucene Dev's mailing list, we want to:
> 1) Change the default response writer type to "wt=json" and also change to
> "indent=on" by default
> 2) Make no changes on the update handler side; it already works as desired
> (it returns the response in the same content-type as the request unless the
> "wt" is passed in explicitly).
> 3) Keep the /query request handler around since people have already used it
> for years to do JSON queries
> 4) Add a commented-out "wt=xml" to the solrconfig.xml as a reminder for folks
> on how to change (back) the response format.
> The default format change, plus the addition of "indent=on" are back compat
> changes, so we need to make sure we doc those clearly in the CHANGES.txt.
> There will also need to be significant adjustments to the Solr Ref Guide,
> Tutorial, etc.
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