org.apache.commons.net.ftp

## Class FTPConnectionClosedException

- java.lang.Object
- - java.lang.Throwable
  - - java.lang.Exception
    - - java.io.IOException
      - - org.apache.commons.net.ftp.FTPConnectionClosedException

- All Implemented Interfaces:
    Serializable

      public class FTPConnectionClosedException
      extends IOException

  FTPConnectionClosedException is used to indicate the premature or unexpected closing of an FTP connection resulting from a `FTPReply.SERVICE_NOT_AVAILABLE` response (FTP reply code 421) to a failed FTP command. This exception is derived from IOException and therefore may be caught either as an IOException or specifically as an FTPConnectionClosedException.
  See Also:
    `FTP`, `FTPClient`, Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `FTPConnectionClosedException()` Constructs a FTPConnectionClosedException with no message
    `FTPConnectionClosedException(String message)` Constructs a FTPConnectionClosedException with a specified message.

  - ### Method Summary

    - ### Methods inherited from class java.lang.Throwable

      `addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### FTPConnectionClosedException

          public FTPConnectionClosedException()

      Constructs a FTPConnectionClosedException with no message

    - #### FTPConnectionClosedException

          public FTPConnectionClosedException(String message)

      Constructs a FTPConnectionClosedException with a specified message.
      Parameters:
        `message` - The message explaining the reason for the exception.