ActiveSupport Notification Allowlist #3327
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Added a new :'instrumentation.active_support_notifications.active_support_events' configuration parameter to permit a user defined allowlist of Active Support notifications event names for the agent to subscribe to that are related to the Active Support library itself. Event names that are not included on the list will be ignored by the agent.
don't attempt to subscribe to notifications based on an empty list
Now that the constant based hash is needed by default_source.rb, make sure its class can successfully require the notifications class
put in a temporary Ruby version <= 2.4 path for older Rubies that don't support `String#delete_prefix` and silence the RuboCop warning within the Ruby <= 2.4 specific path.
reference the Active Support specific event names lists for caching and messages in the documentation for the relevant configuration parameter
Reference the edge content with the fixed anchors Co-authored-by: Kayla Reopelle (she/her) <[email protected]>
tannalynn
approved these changes
Nov 18, 2025
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Added a new
instrumentation.active_support_notifications.active_support_eventsconfiguration parameter to permit a user defined allowlist of Active Support notifications event names for the agent to subscribe to that are related to the Active Support library itself.Event names that are not included on the list will be ignored by the agent.