Known Issues

• This release broke classloader delegation config for OSGi based systems (Wildfly, JBoss, etc) (Fixed in #1275/0.45.0)

Improvements

• Add instrumentation for Spring Scheduling #1192
• Add support for Datadog Profiling #1211
• Memory overhead reduction #1226, #1228
• Startup overhead reduction #1231, #1232, #1233, #1235, #1237, #1240, #1245, #1246, #1247, #1248

Changes

• Move service name mappings processing to DDSpanContext #1217
• Disable peer hostname tag for http servers #1224
• Use more generic instrumentation for classloaders (Tomcat, JBoss, OSGi) #1218 (thanks @trask)
• Change DDTracer to return OpenTracing interfaces instead of DD* implementations #1219
• Determine agent URL lazily #1236

Fixes

• Ensure CallDepthThreadLocalMap is always reset #1227 (thanks @trask )
• Fix JaxRs matching #1229
• Fix NPE with elasticsearch 2 #1215 (thanks @liborio7)