Sample for Spring Boot issue #16407

• Build the project with mvn package
• Run the service with java -jar target/spring-boot-16407-0-SNAPSHOT.jar
• Start a HTTP request against http://localhost:8080/
• While the request is still running, stop the service with Ctrl+C.
• You should see a NullPointerException at org.springframework.boot.actuate.metrics.web.servlet.LongTaskTimingHandlerInterceptor.stopLongTaskTimer.