* @param contextHandle the context handle from registration
     */
    public WitnessUnregisterMessage(byte[] contextHandle) {
        super(WITNESS_UNREGISTER);
        this.contextHandle = contextHandle != null ? contextHandle.clone() : new byte[20];
    }

    /**
     * Sets the context handle for unregistration.
     *
     * @param contextHandle the context handle from registration
     */

    }

    /**
     * Safely registers a class with Kryo, logging any registration failures at WARN level.
     * <p>
     * This method catches exceptions for individual class registrations to ensure
     * that a failure to register one class doesn't prevent other classes from being registered.
     * Registration failures are logged at WARN level since they may cause serialization errors later.
     * </p>
     *

==============================================================================*/

#ifndef TENSORFLOW_C_EAGER_CUSTOM_DEVICE_TESTUTIL_H_
#define TENSORFLOW_C_EAGER_CUSTOM_DEVICE_TESTUTIL_H_

// A simple logging device to test custom device registration.
#include <memory>

#include "tensorflow/c/c_api.h"
#include "tensorflow/c/eager/c_api.h"
#include "tensorflow/c/eager/c_api_experimental.h"
#include "tensorflow/c/tf_status.h"

        return clientComputerName;
    }

    /**
     * Sets the registration flags.
     *
     * @param flags the registration flags
     */
    public void setFlags(int flags) {
        this.flags = flags;
    }

    /**
     * Gets the registration flags.
     *
     * @return the registration flags
     */
    public int getFlags() {
        return flags;
    }

├── WitnessRegistration.java     - Client registration with witness
├── WitnessNotification.java     - Notification handling
├── ResourceChange.java          - Resource change events
└── WitnessTransport.java       - Witness-specific RPC transport
```

#### 6.2 Implementation Tasks
- [ ] Implement Witness RPC protocol
- [ ] Create witness service discovery
- [ ] Implement client registration
- [ ] Add notification callback mechanism

        this.heartbeatInterval = 0;
    }

    /**
     * Creates a new WitnessHeartbeat RPC message with the specified parameters.
     *
     * @param contextHandle the context handle from registration
     * @param sequenceNumber the sequence number for this heartbeat
     */
    public WitnessHeartbeatMessage(byte[] contextHandle, long sequenceNumber) {
        super(WITNESS_HEARTBEAT);

 * memory regions for high-performance RDMA operations.
 *
 * Note: This is a skeleton implementation. A real implementation would
 * require proper DiSNI integration with actual memory registration.
 */
public class DisniMemoryRegion extends RdmaMemoryRegion {

    private static final Logger log = LoggerFactory.getLogger(DisniMemoryRegion.class);

 * configured with initialization parameters that are passed to all registered clients.</p>
 *
 * <p>Features:</p>
 * <ul>
 *   <li>Pattern-based client mapping</li>
 *   <li>Ordered client registration</li>
 *   <li>Bulk client registration</li>
 *   <li>Automatic client initialization</li>
 *   <li>Resource cleanup management</li>
 * </ul>
 *
 */
public class CrawlerClientFactory implements AutoCloseable {

    }

    @Test
    @DisplayName("Test resource unregistration")
    void testResourceUnregistration() {
        TestResource resource = new TestResource("test5");
        String resourceId = resourceManager.registerResource(resource);

        resourceManager.unregisterResource(resourceId);

        // After unregistration, the resource should be removed from active tracking

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * RDMA buffer manager for efficient memory region pooling.
 *
 * Manages pools of pre-registered memory regions to avoid the overhead
 * of frequent registration/deregistration during RDMA operations.
 */
public class RdmaBufferManager implements AutoCloseable {

    private static final Logger log = LoggerFactory.getLogger(RdmaBufferManager.class);