The example project has a controller with 2 endpoints
/event which triggers the state machine
/simple which executes a simplified code that reproduces the issue
The issue only happens when using Hooks.enableAutomaticContextPropagation() which we need to keep tracing in other parts of the code. I've reported the issue to the reactor team and you can see their response here: https://github.com/reactor/reactor-core/issues/3887
The tracing context is being lost when executing triggers in
ReactiveStateMachineExecutorI've uploaded a simple example project with this configuration: https://github.com/mrodal/issue-context-propagation/blob/master/src/main/java/issues/context_propagation/Controller.javaAs you can see the tracing is missing when inside the action:
Debugging I managed to find the part where it is getting lost, in this flatMap: https://github.com/spring-projects/spring-statemachine/blob/4dcf6dc53102257eea74d79818166f53b1068a11/spring-statemachine-core/src/main/java/org/springframework/statemachine/support/ReactiveStateMachineExecutor.java#L119
The example project has a controller with 2 endpoints
/eventwhich triggers the state machine/simplewhich executes a simplified code that reproduces the issueThe issue only happens when using
Hooks.enableAutomaticContextPropagation()which we need to keep tracing in other parts of the code. I've reported the issue to the reactor team and you can see their response here: https://github.com/reactor/reactor-core/issues/3887Related issues: https://github.com/micrometer-metrics/tracing/issues/359 https://github.com/reactor/reactor-core/issues/3887