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Investigate suggestions zero results rate
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Description

cirrus_suggestion_breakdown_no_automata.tsv & cirrus_suggestion_breakdown_with_automata.tsv have 0% zero results since 15 January 2016, which is odd

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As a data quality issue, this needs investigation promptly.

This is caused by the avro serialization problem (T123541) wherein only requests from Wikitech (which uses older version of MW) were stored in Hadoop. Hence 0 queries using suggestions. Once that is resolved and data starts flowing back into Hadoop, we will have a proper ZRR.

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