https://bugzilla.wikimedia.org/show_bug.cgi?id=42825
Web browser: ---
Bug ID: 42825
Summary: Wikidata test client can't load wikidata.org's
revision content from ES
Product: Wikimedia
Version: wmf-deployment
Hardware: All
OS: All
Status: NEW
Severity: major
Priority: Unprioritized
Component: Wikidata
Assignee: [email protected]
Reporter: [email protected]
Classification: Unclassified
Mobile Platform: ---
test2.wikipedia.org is now configured to act as a client to wikidata.org. In
order to show language links defined in the wikidata items, test2 needs to load
revision content from wikidata.org's database. This is done in
WikiPageEntityLookup::loadEntity(). In the $row parameter, this gets a row that
contains fields from wikidata.org's revision table. It then calls
Revision::getRevisionText( $row ) to fetch the revision's blob. But it fails
for some unknown reason.
Example:
* Request: https://test2.wikipedia.org/wiki/New_York_City?action=purge
* LanguageLinkHandler::getEntityLinks() calls
SiteLinkTable::getItemIdForLink(), and gets back the info that q60 is the item
to look for.
* it then calls WikiPageEntityLookup::getEntity() to retrieve the entity
object.
* WikiPageEntityLookup::getEntity queries wikidata.org's database to get the
revision ID for item q60's latest revision.
* it gets rev_id=631469, old_text=DB://cluster25/316188, and
old_flags=utf-8,gzip,external
* WikiPageEntityLookup::getEntity calls self::loadEntity()
* WikiPageEntityLookup::loadEntity calls Revision::getRevisionText on the row
with old_text=DB://cluster25/316188, and old_flags=utf-8,gzip,external.
* Revision::getRevisionText returns false.
Chad tried this in eval.php, and it works. So, apparently, somehow fetching the
revision blob from ES fails.
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