Exception exception = new RuntimeException("test");

        StringBuilder result = monitorTarget.appendException(buf, exception);
        assertSame(buf, result);
    }

    // Concrete implementation of MonitorTarget for testing
    private static class TestMonitorTarget extends MonitorTarget {
        @Override
        public void expired() {
            // Implementation not needed for these tests

        super.setUp();
        target = new HotThreadMonitorTarget();
    }

    public void test_inheritance() {
        assertTrue("HotThreadMonitorTarget should extend MonitorTarget",
                MonitorTarget.class.isAssignableFrom(HotThreadMonitorTarget.class));
        assertTrue("HotThreadMonitorTarget should implement TimeoutTarget",
                TimeoutTarget.class.isAssignableFrom(HotThreadMonitorTarget.class));

    public void setUp() throws Exception {
        super.setUp();
        target = new SystemMonitorTarget();
    }

    public void test_inheritance() {
        assertTrue("SystemMonitorTarget should extend MonitorTarget", MonitorTarget.class.isAssignableFrom(SystemMonitorTarget.class));
        assertTrue("SystemMonitorTarget should implement TimeoutTarget", TimeoutTarget.class.isAssignableFrom(SystemMonitorTarget.class));
    }

     */
    static class MonitorTarget implements TimeoutTarget {

        /** The job log being monitored */
        private final JobLog jobLog;

        /**
         * Constructor for MonitorTarget.
         *
         * @param jobLog the job log to monitor
         */
        public MonitorTarget(final JobLog jobLog) {
            this.jobLog = jobLog;
        }

/**
 * Monitor target for tracking hot threads in the OpenSearch cluster.
 * This class extends MonitorTarget to provide monitoring functionality for
 * hot threads, which helps identify performance bottlenecks and resource
 * usage issues in the search engine cluster.
 */
public class HotThreadMonitorTarget extends MonitorTarget {
    private static final Logger logger = LogManager.getLogger(HotThreadMonitorTarget.class);

    /**