0.51.0

Deprecations

• [dd-trace-api] Deprecate scope finishOnClose and continuation close #1424
  • Close spans manually instead of relying on finishOnClose
  • Use Continuation.cancel() instead of Continuation.close()

Improvements

• [Performance] Avoid allocation of byte[] in MessagePacker.writeString #1435
• [Performance] Intern UTF8 encoding of well known constants to reduce allocation#1430
• [Performance] Replace collection.size() > 0 with not collection.isEmpty() #1420
• [Performance] Avoid allocating an array when getting first header value #1418
• Add instrumentation for OkHttp 2.2+ #1402 (Thanks @jerchung for the contribution)
• Reduce finalize() logging in tracer #1416
• Change logging for ScopeEventFactory creation exception #1417

Changes

• OpenTracing Split #1354, #1439, #1429
  • Note: Some unchecked casting will no longer be possible
    • Spans passed into TraceInterceptor will no longer be castable to io.opentracing.Span or datadog.opentracing.DDSpan
    • Spans returned from OpenTracing interfaces will no longer be castable to datadog.opentracing.DDSpan
• Do not stop profiling on fatal exceptions #1421
• Upgrade jmxfetch to 0.36.1 and integrations-core modules to 7.19.0 #1410
• Upgrade Byte Buddy to 1.10.10 #1409

Fixes

• Fix projectreactor instrumentation to keep span context connected #1308, #1415
• Add volatile on started boolean in ProfilingSystem #1426
• Netty 3.8 had the wrong version in the config property #1423
• Fix cassandra instrumentation to use a daemon thread #1422
• Add null servlet context check #1414