DataDog/dd-trace-dotnet v1.18.0

1.18.0

on GitHub

New

• Expose sampling priority via Span.GetTag() (#739)
  • Now calling Span.GetTag("sampling.priority") returns the sampling priority for the enclosing Trace
• Add new CorrelationIdentifier APIs for manually correlating traces with logs (#742)
  • CorrelationIdentifier.Service
  • CorrelationIdentifier.Version
  • CorrelationIdentifier.Env

Fixes

• Restore missing spans from AdoNet, HttpMessageHandler, WebRequest and Wcf integrations on IIS (#750)

Performance Overhead

• Remove array allocation from NextUInt63 (#743)
• Remove locking in RateLimiter (#744)
• Remove the heap allocation from usage of the System.Diagnostics.Stopwatch class (#756)

Additional Improvements

• Add logging to automatic instrumentation startup code (#748)
• Add additional exception handling around error logging for the Datadog.Trace logs (#737), potential cancellation token exceptions (#731), and accessing environment variables (#747)
• Remove the use of exception filters (#733)
• Split CLR profiler constants into a separate header file (#734)

Build / Test

• Fix issue in the integration-tests pipeline that caused sample application tests to re-use the same NuGet package version (#751)
• Increase reliability of unit-tests pipeline (#741)
• Fix CI issue with .NET Core 3.1.300 SDK (#740)
• Update README for building Windows tracer home assets (#732)
• Improve standard output / standard error logging for integration test SmokeTest failures (#766)

Known Issues and Workarounds

• Application fails to start with System.IO.FileNotFoundException System.Net.Http 4.0.0.0 (#876)
  • This issue has been fixed in .NET Tracer 1.19.2

Changes since 1.17.0