Unable to reset Metrics Counter when Spring Integration is in the classpath

Question

On my spring-boot application (with spring-integration in classpath), i cannot reset any metrics counter. It throw ClassCastException :

Exception in thread "metricsExecutor-1" org.springframework.messaging.MessageDeliveryException: Failed to handle GenericMessage [payload=delete, headers={timestamp=1435738406974, id=4c9aaac0-8bf1-aac1-d9c9-6f8d50f7801b, metricName=counter.test.toto}] to org.springframework.messaging.support.ExecutorSubscribableChannel$SendTask@2e9f560 in org.springframework.boot.actuate.metrics.writer.MetricWriterMessageHandler@4dec731e; nested exception is java.lang.ClassCastException: java.lang.String cannot be cast to org.springframework.boot.actuate.metrics.Metric
    at org.springframework.messaging.support.ExecutorSubscribableChannel$SendTask.run(ExecutorSubscribableChannel.java:144)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to org.springframework.boot.actuate.metrics.Metric
    at org.springframework.boot.actuate.metrics.writer.MetricWriterMessageHandler.handleMessage(MetricWriterMessageHandler.java:46)
    at org.springframework.messaging.support.ExecutorSubscribableChannel$SendTask.run(ExecutorSubscribableChannel.java:135)
    ... 3 more

I think this is a bug with messageChannel so is there a way to disable it ?

Answer 1

Something is sending a message with a String payload ("delete") to the channel that the MetricWriterMessageHandler is subscribed to. It only expects to see Delta or Metric payloads.

If you turn on DEBUG logging you should be able to figure out what's sending the bogus message to the channel.

If you determine it's boot code, open an issue against boot in GitHub.