// 4. Cleanup and unregistration
        assertTrue(mockService.unregisterWitness(regId));
        assertEquals(0, mockService.getRegistrationCount());
        assertFalse(mockService.hasRegistration(regId));

        // 5. Verify heartbeat fails after unregistration
        assertFalse(mockService.processHeartbeat(regId, 4));
    }

    /**

        }
    }

    /**
     * Performs witness unregistration.
     *
     * @param request the unregistration request
     * @return the unregistration response
     * @throws IOException if the RPC call fails
     */
    public WitnessUnregisterResponse unregister(WitnessUnregisterRequest request) throws IOException {
        if (!connected) {

    }

    @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

    private byte[] contextHandle;

    /**
     * Gets the registration ID to unregister.
     *
     * @return the registration ID
     */
    public String getRegistrationId() {
        return registrationId;
    }

    /**
     * Sets the registration ID to unregister.
     *
     * @param registrationId the registration ID
     */
    public void setRegistrationId(String registrationId) {

     * Enumeration of possible witness registration states.
     */
    public enum WitnessRegistrationState {
        /** Registration is in progress */
        REGISTERING,
        /** Registration is active and confirmed */
        REGISTERED,
        /** Unregistration is in progress */
        UNREGISTERING,
        /** Registration has failed */
        FAILED,
        /** Registration has expired due to timeout */
        EXPIRED

        log.error("Witness registration failed: {}", registration.getRegistrationId(), error);
    }
    
    @Override
    public void onRegistrationExpired(WitnessRegistration registration) {
        log.warn("Witness registration expired: {}", registration.getRegistrationId());
        // Could attempt re-registration here
    }
}

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);

        assertNotNull(registration.getRegistrationId());
        assertEquals("\\\\server\\share", registration.getShareName());
        assertEquals(serverAddress, registration.getServerAddress());
        assertEquals(WitnessServiceType.FILE_SERVER_WITNESS, registration.getServiceType());
        assertEquals(WitnessVersion.VERSION_2, registration.getVersion());
        assertEquals(WitnessRegistrationState.REGISTERING, registration.getState());

        this.error = error;
    }

    /**
     * Gets the registration ID.
     *
     * @return the registration ID
     */
    public String getRegistrationId() {
        return registrationId;
    }

    /**
     * Sets the registration ID.
     *
     * @param registrationId the registration ID
     */
    public void setRegistrationId(String registrationId) {

    public void setServerAddress(String serverAddress) {
        this.serverAddress = serverAddress;
    }

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

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