vendor-neutral open source library for metric collection and tracing. OpenCensus is built to add minimal overhead and be deployed fleet wide, especially for microservice-based architectures.
OpenCensus currently supports Prometheus, SignalFX, Stackdriver, Zipkin, Datadog, and Azure App Insights.
A single set of libraries for many languages, including Java, C++, Go, .Net, Python, PHP, Node.js, Erlang, and Ruby.

designed for microservices, cloud native and container-based (Docker, K8s, Mesos) architectures. Underlying technology is a distributed tracing system.

• Provide high performance Java agent, no need to CHANGE any application source code.
  Only increase extra 10% cpu cost in 5000+ tps application, even when collect all traces.
• Manual instrumentation
  • As an OpenTracing supported tracer
  • Use @Trace annotation for any methods you want to trace.
  • Integrate traceId into logs for log4j, log4j2 and logback.