org.apache.commons.net.ftp.FTPConnectionClosedException: FTP response 421 received.  Server closed connection. at org.apache.commons.net.ftp.FTP.__getReply( ) at org.apache.commons.net.ftp.FTP.sendCommand( ) at org.apache.commons.net.ftp.FTP.sendCommand( ) at org.apache.commons.net.ftp.FTP.port( )

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FTP response 421 receivedServer closed connection. at org.apache.commons.net.ftp.FTP.__getReply( ) at org.apache.commons.net.ftp.FTP.sendCommand( ) at org.apache.commons.net.ftp.FTP.sendCommand( ) at org.apache.commons.net.ftp.FTP.port( )
org.apache.commons.net.ftp.FTPConnectionClosedException: FTP response 421 received.  Server closed connection. at org.apache.commons.net.ftp.FTP.__getReply( ) at org.apache.commons.net.ftp.FTP.sendCommand( ) at org.apache.commons.net.ftp.FTP.sendCommand( ) at org.apache.commons.net.ftp.FTP.port( )
at org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:463)
at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2296)
at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2269)

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