IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
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Elastic Docs ›Logstash Reference [5.6] ›Upgrading Logstash

Upgrading with the Persistent Queue Enabled

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Upgrading with the Persistent Queue Enabled

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The following applies only if you are upgrading Logstash and have the persistent queue enabled.

Drain the Persistent Queue

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If you use the persistent queue, we strongly recommend that you drain or delete it before you upgrade.

To drain the queue:

  1. In the logstash.yml file, set queue.drain:true.
  2. Restart Logstash for this setting to take effect.
  3. Shutdown Logstash (using CTRL+C or SIGTERM), and wait for the queue to empty.

When the queue is empty:

  1. Complete the upgrade.
  2. Restart Logstash.

We are working to resolve issues with data incompatibilities so that these steps won’t be required for future upgrades.

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