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Ruby agent v6.4.0

May 28, 2019Download


  • Custom Metadata Collection

    The agent now collects environment variables prefixed by NEW_RELIC_METADATA_. These may be added to transaction events to provide context between your Kubernetes cluster and your services. For details on the behavior, see this blog post.

  • Bugfix for faster ActiveRecord connection resolution

    Version 6.3.0 of the agent backported the faster ActiveRecord connection resolution from Rails 6.0 to previous versions, but the implementation caused certain other gems which measured ActiveRecord performance to stop working. This version of the agent changes the implementation of this performance improvement so no such conflicts occur.

  • Bugfix for Grape instrumentation error

    Previous versions of the agent would fail to install Grape instrumentation in Grape versions 1.2.0 and up if the API being instrumented subclassed Grape::API::Instance rather than Grape::API. A warning would also print to the newrelic_agent log:

    WARN : Error in Grape instrumentation
    WARN : NoMethodError: undefined method `name' for nil:NilClass

    This version of the agent successfully installs instrumentation for subclasses of Grape::API::Instance, and these log messages should no longer appear.

  • Bugfix for streaming responses

    Previous versions of the agent would attempt to insert JavaScript instrumentation into any streaming response that did not make use of ActionController::Live. This resulted in an empty, non-streamed response being sent to the client.

    This version of the agent will not attempt to insert JavaScript instrumentation into a response which includes the header Transfer-Encoding=chunked, which indicates a streaming response.

    This should exclude JavaScript instrumentation for all streamed responses. To include this instrumentation manually, see Manually instrument via agent API in our documentation.

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