Discovery/Status updates/2019-04-22

This is the weekly update for the week starting 2019-04-22

Search

 * Erik found that we were getting production error messages from job runner requests, getting timeouts in Elastica\Taskob runners and fixed it
 * Erik presented on using interleaved methods to evaluate search at this year's Haystack conference
 * David did a lot of work on reindexing spaceless languages wikis to use BM25
 * Stas reindexed Commons wiki which fixed haswbstatement: search

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