Health check timeout message should identify which health check timed out

[tjquinno]

Environment Details

• Helidon Version: 3.x
• Helidon SE or Helidon MP
• JDK version:
• OS:
• Docker version (if applicable):

---

Problem Description

The Helidon code which responds to /health requests applies a timeout (configurable) when it invokes each health check it finds.

The exception does not identify which health check(s) timed out and it would be helpful to developers if it did.

Steps to reproduce

1. Start with the MP QuickStart app.
2. Add this to the microprofile-config.properties file: health.timeout-millis=1000
3. Add this class to the project:

   @Liveness
   @ApplicationScoped
   public class SlowLivenessCheck implements HealthCheck {
      @Override
      public HealthCheckResponse call() {
          try {
              TimeUnit.SECONDS.sleep(5);
          } catch (InterruptedException e) {
              throw new RuntimeException(e);
          }
          return HealthCheckResponse.named("SlowLivenessCheck")
                  .up()
                  .build();
      }
   }

4. mvn package -DskipTests
5. java -jar target/helidon-quickstart-mp.jar
6. From another window: curl http://localhost:8080/health
7. In the original window you see this (partial) stack trace, noting the timeout as the problem but not identifying the offending health check:

   2024.06.11 06:32:29 SEVERE io.helidon.health.HealthSupport Thread[#86,ft-mp-schedule-1,10,main]: Failed to call health checks
   java.util.concurrent.TimeoutException