This Week in Elasticsearch - October 01, 2014

Welcome to This Week in Elasticsearch. In this roundup, we try to inform you about the latest and greatest changes in Elasticsearch. We cover what happened in the GitHub repositories, as well as many Elasticsearch events happening worldwide, and give you a small peek into the future of the project.

Elasticsearch Core

  • Aggregations: Significant Terms Heuristics now registered correctly (#7840, master, 1.5, 1.4 and 1.3)
  • Internal: split internal free context request used after scroll and search (#7856, master, 1.5 and 1.4)
  • MLT Query: Fix percent_terms_to_match (#7754, master and 1.5)
  • Core: Add ThreadPool.terminate to streamline shutdown (#7868, master and 1.5)
  • Core: Add a listener thread pool (#7837, master, 1.5 and 1.4)
  • Aggs: Support for arrays of numeric values in include/exclude clauses (#7727, master and 1.5)
  • Query DSL: Fix NumberFormatException in Simple Query String Query (#7876, master, 1.5 and 1.4)
  • Script scoring: Remove dependency of DocLookup and scorer (#7819, master, 1.5 and 1.4)
  • Discovery: remove any local state and use cluster service state instead (#7834, master, 1.5 and 1.4)
  • NodeFaultDetection: Simplify concurrency control to fully rely on a single map (#7889, master, 1.5 and 1.4)
  • Node shutdown: make close() synchronized (#7885, master, 1.5, 1.4, 1.3 and 1.2)
  • Discovery: Close ping handler's executor service properly (#7903, master, 1.5 and 1.4)
  • Internal: MulticastChannel should wait on receiver thread to stop during shutdown (#7835, master and 1.5)
  • Discovery: master fault detection fall back to cluster state thread upon error (#7908, master, 1.5 and 1.4)
  • MLT Query: use minimum should match more extensive syntax (#7898, master, 1.5)
  • MLT Query: Support for non-indexed documents (#7725, master and 1.5)
  • Optimize API: Fix optimize behavior with force and flush flags (#7904, master, 1.5 and 1.4)
  • REST API: Changed the root rest endpoint to use cluster service (#7933, master, 1.5 and 1.4)
  • Snapshot/Restore: Allow custom metadata to specify whether or not it should be in a snapshot (#7901, master, 1.5 and 1.4)

Full house at last night's DevOps Amsterdam Meetup: DrupalCon & ELK Stack Style

Elasticsearch Ecosystem

Here's some more information about what is happening in the ecosystem we are maintaining around the ELK stack - that's Elasticsearch plus Logstash and Kibana - including plugin and driver releases.

Slides & Videos

A great lessons learned story from Etsy, including how they're using Elasticsearch & Logstash in their new architecture

An incredibly in-depth use case shared at last week's Elasticsearch Netherlands Meetup. Thanks again for hosting us,!

An end to end tutorial on the ELK stack, including code samples and Vagrant environments you can use as you watch

Where to Find Us

We'd love to feature all the great Elasticsearch, Logstash, and Kibana presentations and meetups happening worldwide in this section. If you're speaking or hosting a meetup, let our Director of Developer Relations, Leslie Hawthorn, know!


The Vienna Elasticsearch User Group will convene tomorrow on October 2nd at 7 PM. This next meetup will focus on Elasticsearch use cases. You can register now to attend.


We're a proud sponsor of the 5th anniversary of DevOps Days Belgium, held in its original hometown of Ghent. Elasticsearch will have a booth at the conference, so stop by and say hello to Leslie Hawthorn between sessions. We'll be at DevOps Days October 27-28th.


Zeng Yong, aka Medcl, is one of our most active community members in China. He has two upcoming talks on all things Elasticsearch:



The code.talks conference is back in Hamburg this year on October 9th and 10th, though with a new name. (We had a great time there last year when this conference was known simply as Developer Conference EU.) Alexander Reelsen will be speaking once again, along with Isabel Drost-Fromm.

Here's all the Elasticsearch and ELK stack information on offer at code.talks:

The week after code.talks, Leslie Hawthorn will be heading LinuxCon Europe in Dusseldorf, where she'll speak on the panel Empowering Your Corporate Open Source Software Developers. The panel takes place on Wednesday, October 15th at 2:30 PM, and the conference runs October 13-15th at Congress Centre Dusseldorf.

And, if you happen to be in Karlsruhe on October 16th, you can catch Patrick Peschlow on Elasticsearch Performance in a Nutshell at the Search Meetup Karlsruhe. Registration is now open, and the meetup will begin at 7:15 PM.


New event: Jun Ohtani will attend the Global Hack Day with Mashape in Tokyo. Jun will present on the ELK stack and why he works for Elasticsearch. Global Hack Day takes place October 3rd-5th.

The Netherlands

Nikolay Ignatov and Welin Welchev from Propeople will present on Elasticsearch, the New School Search Engine for Drupal. Join them on Thursday at 10:45 AM to learn all about the Elasticsearch Connector module!


The next Elasticsearch Oslo Meetup is on for October 7th at 6 PM. Register now to save your seat. We'll get back to you with more details as soon as the meeting agenda is finalized.


  • Honza Kral will be speaking at PyCon Poland 2014. The conference runs from October 16-19th in Orle Gniazdo. We'll be back to you with more details on Honza's presentation soon!
  • Honza will speak at PolyConf 2014 on Elasticsearch's language clients, Bridging the gap: one API, 5 languages. Honza takes the stage at 5:30 PM on October 30th, and the conference runs the 30th-31st in Poznan.


The first ever Elasticsearch Meetup in Madrid has been scheduled! The meetup will take place on October 7th from 7:00 - 8:30 PM. Our very own Clinton Gormley will cover all things Elasticsearch. You can register now to save your place.


Two of our developers, Honza Kral and Lee Hinman, will be visiting Sweden on October 7th. Starting at 7:00 PM, we'll convene our sixth Elasticsearch Stockholm Meetup, featuring a demo of our new high-level Python library elasticsearch-dsl and an overview of circuit breaker. You can register now to save your place.


David Pilato will return to Soft-Shake in Geneva once again this year. He will speak on Advanced Search for Your Legacy Application in the Big Data Track. Soft-Shake takes place on October 23-24th, and David will speak in Slot 5 on Thursday.

United States

  • In or around Bellevue, WA tomorrow, October 2nd? Cool, so are we! Please join Steve Mayzak to learn all about the ELK stack: what it is, what you can do with it and how it can provide actionable insights into your data. You can register now to attend the CloudTalk Meetup, and many thanks to these fine folks for hosting us!
  • We'll have a booth at DevOps Days Chicago! Please plan to stop by and visit the Elasticsearch team in between sessions. DevOps Days Chicago runs October 7-8th at the Willis Tower.
  • We'll be in the exhibits hall at Strata and Hadoop World NYC on October 13-15th. Stay tuned for news on a special Strata Meetup and more on where to find us at the conference!
  • Leslie Hawthorn will be speaking at the All Things Open Conference on What Does Big Data Really Mean for Your Business? All Things Open takes place October 22-23 in Raleigh, North Carolina, and Leslie will speak at 2:15 PM on Wednesday.

Where to Find You

Our Director of Developer Relations, Leslie Hawthorn, is hard at work to help folks create more Elasticsearch meetup groups and to help meetup organizers find more speakers. If you are interested in either effort, let her know.

Oh yeah, we're also hiring. If you'd like us to find you for employment purposes, just drop us a note.  We care more about your skill set and passion for Elasticsearch, Kibana, and Logstash than where you rest your head.


If you are interested in Elasticsearch training we have courses taught by our core developers coming up in:

  • Madrid - October 7, 2014 (core Elasticsearch training)
  • Amsterdam - October 14, 2014 (core Elasticsearch training)
  • Amsterdam - October 16, 2014 (Getting started workshop)
  • San Francisco - October 16, 2014 (Getting started workshop)
  • New York - October 23, 2014 (Getting started workshop)
  • London - October 28, 2014 (core Elasticsearch training)
  • London - October 30, 2014 (Getting started workshop)
  • We're hiring

    Work for a global, distributed team where finding someone like you is just a Zoom meeting away. Flexible work with impact? Development opportunities from the start?