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You're reading from Monitoring Elasticsearch

Product typeBook

Published inJul 2016

PublisherPackt

ISBN-139781784397807

Edition1st Edition

Tools

Elasticsearch

Concepts

Enterprise Search

Authors (3):

Dan Noble

Pulkit Agrawal

Mahmoud Lababidi

View More author details

Reviewing some case studies

This section discusses some real-world scenarios of Elasticsearch node failure and how to address them.

The ES process quits unexpectedly

A few weeks ago we noticed in Marvel that the Elasticsearch process was down on one of our nodes. We restarted Elasticsearch on this node, and everything seemed to return to normal. However, checking Marvel later on in the week, we notice that the node is down again. We decide to look at the Elasticsearch log files, but don't notice any exceptions. As we don't see anything in the Elasticsearch log, we suspect that the operating system may have killed Elasticsearch. Checking syslog at /var/log/syslog, we see the error:

Out of memory: Kill process 5969 (java) score 446 or sacrifice child

This verifies that the operating system killed Elasticsearch because the system was running out of memory. We check the Elasticsearch configuration and don't see any issues. This node is configured in the same way as the other nodes in the cluster...

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Monitoring Elasticsearch

Published in: Jul 2016Publisher: PacktISBN-13: 9781784397807

Authors (3)

Dan Noble

About the Author Dan is a software engineer with a passion for writing secure, clean, and articulate code. He enjoys working with a variety of programming languages and software frameworks, particularly Python, Elasticsearch, and frontend technologies. Dan currently works on geospatial web applications and data processing systems. Dan has been a user and advocate of Elasticsearch since 2011. He has given talks about Elasticsearch at various meetup groups, and is the author of the Python Elasticsearch client “rawes.” Dan was also a technical editor for the Elasticsearch Cookbook, Second Edition, by Alberto Paro (ISBN: 1783554835). Acknowledgements I would like to thank my beautiful wife, Julie, for putting up with me while I wrote this book. Thanks for supporting me every step of the way. I would also like to thank my friends and colleagues James Cubeta, Joe McMahon, and Mahmoud Lababidi, who shared their insight, time, and support. I would like to give a special thanks to Abe Usher – you have been an incredible mentor over the years. Finally, thanks to everyone at Packt Publishing for helping to make this book happen. A special thanks to Merint Mathew, Sonali Vernekar, Husain Kanchwala, and Amey Varangaonkar for your valuable and careful feedback.
Read more about Dan Noble

Pulkit Agrawal

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You're reading from Monitoring Elasticsearch

Reviewing some case studies

The ES process quits unexpectedly

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