Using Hadoop to Create SOLR Indexes

One of the most challenging projects I faced at work recently was to create a Apache SOLR index consisting of approx 15 million records. This index had been created once in the history of the company using a MySQL database and SOLR’s Data Import Handler (DIH). It had not been attempted since then because the original indexing process was time consuming (12-14 hours), required human supervision, and on failure had to be restarted from the very beginning.
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