@Override
        public void run() {
            try {
                while (alive.get()) {
                    op.run();
                }
            } catch (Throwable t) {
                log.error("Metric {} failed with exception", opName, t);
            }
        }
Verifies that concurrent sensor add, remove, updates and read with a metrics reporter
that synchronizes on every reporter method doesn't result in errors or deadlock.
clients/src/test/java/org/apache/kafka/common/metrics/MetricsTest.java