Changes by Version

2.16.0 (2019-03-24)

• Add baggage to B3 codec (#319)
• Add support for 128bit trace ids to zipkin thrift spans. (#378)
• Update zipkin propagation logic to support 128bit traceIDs (#373)

• Accept "true" for the x-b3-sampled header (#356)

• Allow setting of PoolSpans from Config object (#322)

• Make propagators public to allow wrapping (#379)

• Change default metric namespace to use relevant separator for the metric backend (#364)

• Change metrics prefix to jaeger_tracer and add descriptions (#346)

• Bump OpenTracing to ^1.1.x (#383)

• Upgrade jaeger-lib to v2.0.0 (#359)

• Avoid defer when generating random number (#358)

• Use a pool of rand.Source to reduce lock contention when creating span ids (#357)

• Make JAEGER_ENDPOINT take priority over JAEGER_AGENT_XXX (#342)

2.15.0 (2018-10-10)

• Fix FollowsFrom spans ignoring baggage/debug header from dummy parent context (#313)
• Make maximum annotation length configurable in tracer options (#318)
• Support more environment variables in configuration (#323)
• Print error on Sampler Query failure (#328)
• Add an HTTPOption to support custom http.RoundTripper (#333)
• Return an error when an HTTP error code is seen in zipkin HTTP transport (#331)

2.14.0 (2018-04-30)

• Support throttling for debug traces (#274)
• Remove dependency on Apache Thrift (#303)
• Remove dependency on tchannel (#295) (#294)
• Test with Go 1.9 (#298)

2.13.0 (2018-04-15)

• Use value receiver for config.NewTracer() (#283)
• Lock span during jaeger thrift conversion (#273)
• Fix the RemotelyControlledSampler so that it terminates go-routine on Close() (#260)
• Added support for client configuration via env vars (#275)
• Allow overriding sampler in the Config (#270)

2.12.0 (2018-03-14)

• Use lock when retrieving span.Context() (#268)
• Add Configuration support for custom Injector and Extractor (#263)

2.11.2 (2018-01-12)

• Add Gopkg.toml to allow using the lib with dep

2.11.1 (2018-01-03)

• Do not enqueue spans after Reporter is closed (#235, #245)
• Change default flush interval to 1sec (#243)

2.11.0 (2017-11-27)

• Normalize metric names and tags to be compatible with Prometheus (#222)

2.10.0 (2017-11-14)

• Support custom tracing headers (#176)
• Add BaggageRestrictionManager (#178) and RemoteBaggageRestrictionManager (#182)
• Do not coerce baggage keys to lower case (#196)
• Log span name when span cannot be reported (#198)
• Add option to enable gen128Bit for tracer (#193) and allow custom generator for high bits of trace ID (#219)

2.9.0 (2017-07-29)

• Pin thrift <= 0.10 (#179)
• Introduce a parallel interface ContribObserver (#159)

2.8.0 (2017-07-05)

• Drop jaeger. prefix from jaeger.hostname process-level tag
• Add options to set tracer tags

2.7.0 (2017-06-21)

• Fix rate limiter balance #135 #140
• Default client to send Jaeger.thrift #147
• Save baggage in span #153
• Move reporter.queueLength to the top of the struct to guarantee 64bit alignment #158
• Support HTTP transport with jaeger.thrift #161

2.6.0 (2017-03-28)

• Add config option to initialize RPC Metrics feature

2.5.0 (2017-03-23)

• Split request latency metric by success/failure #123
• Add mutex to adaptive sampler and fix race condition #124
• Fix rate limiter panic #125

2.4.0 (2017-03-21)

• Remove _ms suffix from request latency metric name #121
• Rename all metrics to "request" and "http_request" and use tags for other dimensions #121

2.3.0 (2017-03-20)

• Make Span type public to allow access to non-std methods for testing #117
• Add a structured way to extract traces for logging with zap #118

2.2.1 (2017-03-14)

• Fix panic caused by updating the remote sampler from adaptive sampler to any other sampler type (https://github.com/uber/jaeger-client-go/pull/111)

2.2.0 (2017-03-10)

• Introduce Observer and SpanObserver (https://github.com/uber/jaeger-client-go/pull/94)
• Add RPC metrics emitter as Observer/SpanObserver (https://github.com/uber/jaeger-client-go/pull/103)

2.1.2 (2017-02-27)

• Fix leaky bucket bug (https://github.com/uber/jaeger-client-go/pull/99)
• Fix zap logger Infof (https://github.com/uber/jaeger-client-go/pull/100)
• Add tracer initialization godoc examples

2.1.1 (2017-02-21)

• Fix inefficient usage of zap.Logger

2.1.0 (2017-02-17)

• Add adapter for zap.Logger (https://github.com/uber-go/zap)
• Move logging API to ./log/ package

2.0.0 (2017-02-08)

• Support Adaptive Sampling
• Support 128bit Trace IDs
• Change trace/span IDs from uint64 to strong types TraceID and SpanID
• Add Zipkin HTTP B3 Propagation format support #72
• Rip out existing metrics and use github.com/uber/jaeger-lib/metrics
• Change API for tracer, reporter, sampler initialization

1.6.0 (2016-10-14)

• Add Zipkin HTTP transport
• Support external baggage via jaeger-baggage header
• Unpin Thrift version, keep to master

1.5.1 (2016-09-27)

• Relax dependency on opentracing to ¹

1.5.0 (2016-09-27)

• Upgrade to opentracing-go 1.0
• Support KV logging for Spans

1.4.0 (2016-09-14)

• Support debug traces via HTTP header "jaeger-debug-id"