// Expected
                }
            }

            // Circuit should be OPEN after 3 failures
            assertEquals(State.OPEN, customCb.getState(), "Circuit should be OPEN after regular failures");
            assertEquals(3, customCb.getFailureCount(), "Should have 3 failures");

            // Reset for custom predicate test
            customCb.reset();

            int failures = consecutiveFailures.incrementAndGet();
            if (failures >= failureThreshold) {
                if (state.compareAndSet(State.CLOSED, State.OPEN)) {
                    stateChangeTime.set(System.currentTimeMillis());
                    log.warn("Circuit breaker {} opened after {} consecutive failures", name, failures);
                }
            }
        }
    }

    /**

            log.warn("[{}] Failure in HALF_OPEN state, reopening circuit: {}", name, e.getMessage());
            transitionTo(State.OPEN);
        } else if (currentState == State.CLOSED) {
            int failures = failureCount.incrementAndGet();
            int currentThreshold = this.failureThreshold;
            log.debug("[{}] Failure in CLOSED state ({}/{}): {}", name, failures, currentThreshold, e.getMessage());

                    // Exponential backoff on errors: max 30 seconds, based on consecutive failures
                    try {
                        int failures = Math.min(registration.getHeartbeatFailures(), MAX_FAILURE_LIMIT);
                        long backoffDelay = Math.min(MAX_ERROR_BACKOFF, BASE_ERROR_DELAY * (1L << failures));
                        Thread.sleep(backoffDelay);

        int failures = getFailureCount(handle);

        // Base interval starts at 1 second, increases with failures
        // Max interval is 30 seconds for inactive directories
        return Math.min(MAX_POLL_INTERVAL, BASE_POLL_INTERVAL + (failures * 2000));
    }

    /**
     * Get failure count for a handle
     *
     * @param handle notification handle

| `minio_cluster_erasure_set_read_tolerance`       | Number of drive failures that can be tolerated without disrupting read operations. <br><br>Type: gauge  | `pool_id`, `set_id` |
| `minio_cluster_erasure_set_write_tolerance`      | Number of drive failures that can be tolerated without disrupting write operations. <br><br>Type: gauge | `pool_id`, `set_id` |

| `minio_cluster_replication_proxied_head_requests_failures` | (_Site Replication Only_)Number of failures in HEAD requests proxied to replication target                          |

            if (transport.isFailed()) {
                return true;
            }

            // Check for consecutive failures
            String key = getConnectionKey(transport);
            AtomicInteger failures = consecutiveFailures.get(key);
            if (failures != null && failures.get() >= MAX_CONSECUTIVE_FAILURES) {
                Long lastFailure = lastFailureTimes.get(key);

    @Test
    @DisplayName("Test mixed success and failure pattern")
    void testMixedPattern() throws Exception {
        // Success
        circuitBreaker.call(() -> "success");

        // Two failures (not enough to open)
        for (int i = 0; i < 2; i++) {
            try {
                circuitBreaker.call(() -> {
                    throw new RuntimeException("Test failure");
                });

    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,
  ) {
  }

  /**
   * Invoked when a connection attempt fails. This failure is not terminal if further routes are
   * available and failure recovery is enabled.
   *
   * If the `call` uses HTTPS, this will be invoked after [secureConnectStart], otherwise it will
   * invoked after [connectStart].
   */