this.delegate = null
      delegate.onClosed(webSocket, code, reason)
    } else {
      events.add(Closed(code, reason))
    }
  }

  override fun onFailure(
    webSocket: WebSocket,
    t: Throwable,
    response: Response?,
  ) {
    Platform.get().log("[WS $name] onFailure", Platform.INFO, t)
    val delegate = delegate
    if (delegate != null) {
      this.delegate = null

                  // which case we should skip right down to shutdown.
                  if (isRunning()) {
                    try {
                      AbstractExecutionThreadService.this.run();
                    } catch (Throwable t) {
                      restoreInterruptIfIsInterruptedException(t);
                      try {
                        shutDown();
                      } catch (Exception ignored) {

    }

    @Override
    public OptionalThing<ApiResponse> handleServerException(final ApiFailureResource resource, final Throwable cause) {
        return OptionalThing.of(asJson(createFailureBean(Status.SYSTEM_ERROR, createMessage(resource, cause))));
    }

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

    get().log("[ES] onClosed", Platform.INFO, null)
    events.add(Closed)
    drainCancelQueue(eventSource)
  }

  override fun onFailure(
    eventSource: EventSource,
    t: Throwable?,
    response: Response?,
  ) {
    get().log("[ES] onFailure", Platform.INFO, t)
    events.add(Failure(t, response, t?.message ?: response?.body?.string()))
    drainCancelQueue(eventSource)
  }

     *              (A {@code null} value is permitted, and indicates that the cause is nonexistent or unknown.)
     */
    public CrawlerSystemException(final String message, final Throwable cause) {
        super(message, cause);
    }

    /**
     * Constructs a new CrawlerSystemException with the specified detail message.
     *

    /**
     * Constructor.
     * @param message Exception message.
     * @param cause Root cause for this exception.
     */
    public ScheduledJobException(final String message, final Throwable cause) {
        super(message, cause);
    }

    /**
     * Constructor.
     * @param message Exception message.
     */
    public ScheduledJobException(final String message) {
        super(message);

public class ArtifactDoesNotExistException extends Exception {
    public ArtifactDoesNotExistException(final String message) {
        super(message);
    }

    public ArtifactDoesNotExistException(final String message, final Throwable cause) {
        super(message, cause);
    }

    }

    /**
     * Builds a comprehensive error message from a throwable and its causes.
     * This method traverses the cause chain and concatenates all error messages.
     *
     * @param t the throwable to build message from
     * @return a string containing all error messages in the cause chain
     */
    protected String buildThrowableMessage(final Throwable t) {
        final StringBuilder buf = new StringBuilder(100);

            }
        }
        return "unknown";
    }

    private long extractNtStatus(Throwable cause) {
        if (cause instanceof SmbException) {
            return ((SmbException) cause).getNtStatus();
        }
        return 0;
    }

    private String extractServerMessage(Throwable cause) {
        if (cause instanceof SmbException) {
            // Try to get server message from SMB exception

@Consumer
public class VersionRangeResolverException extends MavenException {

    @Serial
    private static final long serialVersionUID = 4455478418692494141L;

    public VersionRangeResolverException(String message, Throwable cause) {
        super(message, cause);
    }