How To Solve Issues Related to Log – Key ; date ; doc-count

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Updated: Feb-20

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Log Context
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Troubleshooting background

To troubleshoot Elasticsearch log “Key ; date ; doc-count” it’s important to understand common problems related to Elasticsearch concepts: aggregations. See detailed explanations below complete with common problems, examples and useful tips.


To help troubleshoot related issues we have gathered selected Q&A from the community and issues from Github , please review the following for further information :

1 Elasticsearch Get only those date histograms whose bucket size is greater than given number 1 0.10 K 

2 Date Histogram And Derivative On Do    


Log Context

Log ” key [{}]; date [{}]; doc_count [{}]” classname is datehistogram-aggregation.asciidoc
We have extracted the following from Elasticsearch source code to get an in-depth context :

 for (Histogram.Bucket entry : agg.getBuckets()) {
    DateTime key = (DateTime) entry.getKey();    // Key
    String keyAsString = entry.getKeyAsString(); // Key as String
    long docCount = entry.getDocCount();         // Doc count

    logger.info("key [{}]; date [{}]; doc_count [{}]"; keyAsString; key.getYear(); docCount);
}
--------------------------------------------------

This will basically produce for the first example:







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