}
    }
  }

  /**
   * Report and attempt to recover from a failure to communicate with a server. Returns true if
   * `e` is recoverable, or false if the failure is permanent. Requests with a body can only
   * be recovered if the body is buffered or if the failure occurred before the request has been
   * sent.
   */
  private fun recover(
    e: IOException,
    call: RealCall,
    chain: Interceptor.Chain,

    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].
   */
  open fun connectFailed(
    call: Call,

            }

            recentAttempts.incrementAndGet();
            lastAttempt = now;
        }

        void recordSuccess() {
            // Reduce counter on success to allow recovery
            recentAttempts.updateAndGet(val -> Math.max(0, val - 1));
        }

        void reset() {
            recentAttempts.set(0);
            blocked.set(false);
            blockExpiry = null;

            FailoverState::new
        );
        
        // Redistribute pending operations
        redistributePendingOperations(failedChannel);
        
        // Attempt recovery
        if (state.shouldRetry()) {
            scheduleRecovery(failedChannel, state);
        } else {
            // Remove channel after max retries
            removeChannel(failedChannel);
        }
    }

    private static final String[] CAT_NAMES =
            { "aliases", "allocation", "count", "fielddata", "health", "indices", "master", "nodeattrs", "nodes", "pending_tasks",
                    "plugins", "recovery", "repositories", "thread_pool", "shards", "segments", "snapshots", "templates" };

    // ===================================================================================

//   - on rewrite dataDir on disk that must be additionally purged
//     only after as a 2-phase call, allowing the older dataDir to
//     hang-around in-case we need some form of recovery.
type RenameDataResp struct {
	Sign       []byte `msg:"s"`
	OldDataDir string `msg:"od"` // contains '<uuid>', it is designed to be passed as value to Delete(bucket, pathJoin(object, dataDir))
}

const (

        ConnectionMetrics metrics = connectionMetrics.get(key);
        if (metrics != null) {
            metrics.recordFailure();
        }
    }

    /**
     * Record connection success for recovery tracking
     */
    private void recordConnectionSuccess(String key) {
        consecutiveFailures.remove(key);
        lastFailureTimes.remove(key);

}
```

## 9. Error Handling and Fallback

### 9.1 RDMA Error Recovery
```java
public class RdmaErrorHandler {
    public void handleRdmaError(RdmaConnection connection, Exception error) {
        log.warn("RDMA error occurred: {}", error.getMessage());
        
        if (isRecoverableError(error)) {
            // Attempt to recover connection
            try {
                connection.reset();

    SmbFile file2 = new SmbFile("smb://server/share/persistent.txt", context);
    assertTrue(file2.exists());  // Should reconnect with persistent handle
}
```

## 9. Error Handling and Recovery

### 9.1 Handle Break Scenarios
```java
public enum HandleBreakReason {
    NETWORK_FAILURE,      // Network connection lost
    SESSION_EXPIRED,      // Session timeout

    exception the callback is now notified that the call was canceled. The exception is still sent
    to the uncaught exception handler for reporting and recovery.

 *  Fix: Un-deprecate `MockResponse.setHeaders()` and other setters. These were deprecated in OkHttp
    4.0 but that broke method chaining for Java callers.