Puma phased restarts

Affected components

• AppSignal for Ruby gem version v2.9.17 and later (see workarounds).

Description

We've added a new plugin to add our Puma magic dashboard in version 2.9.17 of our gem, which breaks Puma phased restarts.

See appsignal-ruby issue #575 for more details on the specific error.

Symptoms

The AppSignal integration stops, but is not restarted when using Puma phased restarts.

Workaround

• Downgrade the AppSignal gem to 2.9.16 until the issue has been resolved.
• Do not use Puma's phased restart feature until the issue has been resolved.