21.12.0

Deprecations

• finagle-zipkin-core: c.t.f.zipkin.core.Sampler.DefaultSampleRate is deprecated in favor of c.t.f.zipkin.core.DefaultSampler.sampleRate. bd04e1c9

Bug Fixes

• finagle-zipkin-core: c.t.f.zipkin.core.Sampler would sample at 1/10,000 rate when configured with a lower (but non-zero) rate. It can now sample at rates as low as 1/16,777,216. 17cfb580

Runtime Behavior Changes

• finagle-zipkin-scribe: c.t.f.zipkin.thrift.ZipkinTracer uses c.t.f.zipkin.core.DefaultSampler.sampleRate as the default sample rate instead of deprecated c.t.f.zipkin.core.Sampler.DefaultSampleRate. This allows it to correctly observe user-configured overrides to the default sample rate. When a ZipkinTracer is constructed with default parameters and there are no user-configured overrides, the behavior is unchanged. bd04e1c9