Improvements

• Support dd.runtime.metrics.enabled system property and DD_RUNTIME_METRICS_ENABLED environment variable #1922
• Support DD_TRACE prefix when configuring integrations #1921
• Support dd.trace.startup.logs system property and DD_TRACE_STARTUP_LOGS environment variable #1918
• Avoid copying tags (potentially twice) when sampling each span #1909
• Add specific instrumentation for ScheduledExecutorService #1883
• Cleanup dependency on Guava #1907
• [Efficiency] Don't set span type via the tags map, just set it directly #1930
• [Efficiency] Field inject sql into PreparedStatement, avoid WeakMap in JDBCMaps #1927

Changes

• Remove span.origin.type tag #1926
• Exclude 1.8.0_262 onwards from creating scope events… #1915
• Change internal task scheduling #1861
• Enable OpenTracing to inherit the async propagation from enclosing scope #1850

Fixes

• Stop bundling scala with dd-java-agent #1900
• Make FieldBackedProvider respect class loader matchers #1920
• Don't leak an internal dependency #1911
• Span.log() messages incorrect #1899