Node.js agent release notesRSS

New features

• Instrumentation will now only modify the arity of wrapped functions when needed.

  This can be controlled with the matchArity property on a WrapSpec. Disabling arity matching has a significant, positive impact on the performance of instrumentation.

Improvements

• Added benchmarks for shimmer methods.

• Pinned hapi tests at v16 due to incompatibility in hapi v17 with Node.js versions <8.

• The agent's parsed queries will now only hold onto the stack that the query was made at, instead of an error object instance.

  Previously, the parsed query objects would hold onto an error instance, which would in turn hold onto references to all the functions in the stack when the error was created. This could cause memory issues if the functions were holding onto references to other pieces of data.

Bug fixes

• Revert wrapping of https for Node ^8.9.1.

  The original cause for this problem was reverted by Node.

Improvements

• Added Node 9 to test suite.
• Removed problematic tests for ancient version of Hapi (7.1).
• Document purpose of throw in tracer to prevent developer confusion.
• Added script for running agent micro benchmarks.
• Added benchmarks for all the Shim and Tracer methods.

Bug fixes

• Fixed a bug with Node >=8.9 that prevented https externals from being recorded.

Improvements

• Agent will attempt to reconnect to the collector forever after backing off to 5 minute delays.

Bug fixes

• Refactored environment scan to improve startup time and fix cyclical symlink resolving.

New features

• The agent will now support the Node 8 await keyword by default.

Improvements

• Added benchmark for performance of function wrapping.
• Added Garbage Collection information to async_hooks benchmark.
• Improved trace-level logging for capturing queries.
• Added cases for omitting the agent with and without async hooks to the async hooks microbenchmark.

Bug fixes

• Pinned version of Mocha to 3.x due to the incompatibility of Mocha v4 and Node v0.10 and v0.12.

Bug fixes

• Hapi handlers will now preserve the defaults associated with them.

  Previously when wrapping handlers, the agent would drop the associated defaults on the ground, these are now properly forwarded to the wrapper. Big thanks to Sean Parmelee (@seanparmelee) for finding the root cause of this bug and reporting it!

• Fixed starting the agent with an invalid process version.

• Pinned request version for testing old versions of Node.

• Added tests for feature flags created at agent initialization.

Improvements

• Added metrics for enabled/disabled feature flags.

Bug fixes

• Fixed transaction naming for Hapi plugins.

Thanks to Marc Höffl (@KeKs0r) for providing a reproduction!

New features

• Added support for ignoring ranges of status codes.

  The configuration error_collector.ignore_status_codes can now take ranges of numbers. For example, ignore_status_codes: ['400-404'] would ignore 400, 401, 402, 403, and 404.

• Experimental instrumentation for async/await

  This is experimental instrumentation and has not yet been tested in a wide array of production environments. The feature is currently off by default behind a feature flag. To enable this experimental instrumentation, add await_support: true to the feature_flag setting in your agent config file.

Improvements

• Updated examples and documentation regarding custom transaction creation.

  All examples and documentation now point at the newrelic.start*Transaction methods.

• Transaction state is now maintained in ChildProcess event listeners.

• Reducing logging verbosity in the SQL query obfuscator.

Bug fixes

• Fixed a bug when a custom collector port was provided in the configuration that prevented redirected connections from working.

• Fixed a bug in Shim#record that could cause an exception when trying to create a new segment as part of an ended/inactive transaction.

• Fixed issue with custom Hapi handlers causing an error.

  Previously custom Hapi handlers defined using the server.handler() method were causing the Hapi server to return a 500 error. Now they are correctly handled and recorded as middleware functions.

Improvements

• Improved metadata collection for AWS, Azure, GCE, and Pivotal Cloud Foundry.

Bug fixes

• Fixed a bug in PG query obfuscation for $ placeholders.

  The agent used to mis-detect $1 value placeholders as unmatched dollar-quoted strings causing the whole query to be obfuscated to just ?. These placeholders are now correctly detected and obfuscated.

Improvements

• Improved documentation for newrelic.start*Transaction and TransactionHandle.

  Formatting for the startWebTransaction and startBackgroundTransaction methods was fixed and documentation for the TransactionHandle class which getTransaction returns was added.

Bug fixes

• Fixed parsing the table name from SQL queries.

  Quotes around the table name are now stripped after parsing the query and before constructing the metrics.

• Fixed unhandled rejection error caused by ioredis instrumentation.