Known Issues

• The new Netty Promise instrumentation can cause an increased memory overhead due to pending traces being buffered.
• After a very large trace, traces may stop being reported. If your application produces very large traces, stay on 0.72.0 or wait for 0.75.0

Improvements

• Instrumentation for Netty Promises #2397
• Initial support for detecting certain libraries at boot to help tune agent behaviour #2388
• Added instrumentation for ignoring Zuul Proxy Headers #2330

Changes

• Change log injection default to true #2391
• sql cardinality reduction #2337

Fixes

• update gRPC instrumentation, run tracing interceptor first #2384
• Delay starting JMXFetch (15s to match default check period) #2372

Performance

• prevent application threads from interacting directly with StatsD: 15% reduction in CPU and allocation in application level benchmarks #2402
• HttpServerDecorator performance tweaks #2398
• replace atomics with volatile primitives in state and continuation #2392