Improvements

Core

• Avoid using type resolver loadClass fallback with groovy.lang.GroovyClassLoader #4505
• Guard against agent being initialized twice #4474
• Log JSON sampling rules when failed to parse for easier debugging. #4469

Profiling

• Disable built-in walltime tracing when wallclock profiler is enabled #4518
• Add 10 ms threshold to datadog.EndpointEvent #4514
• Disable jdk.FileWrite on OpenJDK versions where durations are incorrect #4512

Debugger

• Add line probe span instrumentation #4510
• Add index operator in Expression Language #4498
• Merge snapshot probe into log probe config #4492
• Add null literal support #4478
• Fix evaluation error reporting for merged probes #4476
• Add Span Probe instrumentation for method probe #4466
• Fix NotEqual operator #4465
• Remove prefixes for value reference in expressions #4378

Performance

• Detect process-id on Java 8 via ManagementFactory instead of JNR/POSIX #4506
• Load instrumentation classes in separate classloader so they can be unloaded after use #4484

Application Security Management (ASM)

• Support request body interception in servlet 5+ #4501
• Add configuration timeout for the WAF #4490
• Reenable appsec on IBM J9 #4460
• Fix instrumentation problem in jetty 9.4 #4459

CI Visibility

• Handle HTTP response 429: Rate Limit Exceeded #4480
• Fail process when running in Agentless mode and API key is not set #4479
• DDIntakeWriter: Do not flush after every single trace #4471

Integrations

• Apache httpclient5 async instrumentation #4472
• Set servlet.context & servlet.path for Undertow Servlet Request #4463

Telemetry

• AgentCLI command to debug detected dependencies #4458
• Reduce Telemetry warnings #4454

Efficiency

• Provide access to the original location of TypeDescriptions #4444

Miscellaneous

• Added NoOp implementation of HealthMetrics and modified tests #4470

Fixes

Remote Configuration

• Fix configuration path parsing #4494