Handle exceptions in micronaut scheduled tasks

By default micronaut simply logs any exceptions that are thrown during scheduled tasks. To change this behaviour you simply have to override the bean DefaultTaskExceptionHandler, the default implementation of TaskExceptionHandler with your own implementation:

@Singleton
@Replaces(DefaultTaskExceptionHandler.class)
@Slf4j
class HelloWorldTaskExceptionHandler implements TaskExceptionHandler<Object, Throwable> {
  //override handle method here
}

@Replaces lets a bean specify that it replaces another bean. All that is left is to implement the handle method which takes the offending bean and the exception that was thrown as arguments.

@Override
void handle(@Nullable Object bean, @Nonnull Throwable throwable) {
    log.error("${bean.toString()} threw an exception ${throwable.message}")
    log.info("You can do whatever you want with the thrown exception in here")
}

You can find an example implementation of this on github.