Book Image

Learning RabbitMQ

By : Martin Toshev
Book Image

Learning RabbitMQ

By: Martin Toshev

Overview of this book

RabbitMQ is Open Source Message Queuing software based on the Advanced Message Queue Protocol Standard written in the Erlang Language. RabbitMQ is an ideal candidate for large-scale projects ranging from e-commerce and finance to Big Data and social networking because of its ease of use and high performance. Managing RabbitMQ in such a dynamic environment can be a challenging task that requires a good understanding not only of how to work properly with the message broker but also of its best practices and pitfalls. Learning RabbitMQ starts with a concise description of messaging solutions and patterns, then moves on to concrete practical scenarios for publishing and subscribing to the broker along with basic administration. This knowledge is further expanded by exploring how to establish clustering and high availability at the level of the message broker and how to integrate RabbitMQ with a number of technologies such as Spring, and enterprise service bus solutions such as MuleESB and WSO2. We will look at advanced topics such as performance tuning, secure messaging, and the internals of RabbitMQ. Finally we will work through case-studies so that we can see RabbitMQ in action and, if something goes wrong, we'll learn to resolve it in the Troubleshooting section.
Table of Contents (18 chapters)
Learning RabbitMQ
About the Author
About the Reviewers

General troubleshooting approach

As RabbitMQ instances run on top of the Erlang virtual machine, we can leverage the troubleshooting utilities provided by Erlang to troubleshoot problems occurring in the message broker. The variety of errors occurring may range from problems relating to starting/stopping the broker instance to performance issues—we already covered performance tuning and monitoring in the previous chapter; therefore, you can already apply that knowledge to troubleshooting. We will use a top-down approach to troubleshoot issues, as follows:

  1. Check the status of a particular node.

  2. Inspect RabbitMQ logs.

  3. Check the RabbitMQ community mailing list or ask in the IRC chat.

  4. Use Erlang utilities to troubleshoot a particular node.

Checking the status of a particular node

You can check the status of a particular node using the rabbitmq utility as follows:

rabbitmqctl.bat -n instance1 status

In the preceding example, we are checking the status of the instance1 RabbitMQ node. You will observe...