FailoverClientHandler.java 文件源码

private boolean shouldHandleException(IOException ex) {
  // enumerate handled exceptions
  if (ex instanceof ConnectException ||
      ex instanceof NoRouteToHostException ||
      ex instanceof PortUnreachableException ||
      ex instanceof EOFException ||
      ex instanceof ConnectionClosedException) {
    return true;
  }
  if (ex instanceof RemoteException
      && ((RemoteException) ex).unwrapRemoteException() instanceof SafeModeException) {
    return true;
  }
  return false; // we rethrow all other exceptions (including remote exceptions
}