Facing FTPConnectionClosedException when using FTPProvider in ESB to connect to FTP server over FTPS protocol,

Issue

• When using FTPProvider in ESB to connect to an FTP server over FTPS protocol it throws FTPConnectionClosedException as shown below. What could be the root cause behind this issue and how to fix it? Do note while using external FTP clients to connect to FTP servers it works fine.

...
Caused by: org.jboss.soa.esb.util.RemoteFileSystemException: org.jboss.soa.esb.util.RemoteFileSystemException: org.apache.commons.net.ftp.FTPConnectionClosedException: Connection closed without indication.
    at org.jboss.soa.esb.util.RemoteFileSystemFactory.getRemoteFileSystem(RemoteFileSystemFactory.java:70)
    ...
Caused by: org.jboss.soa.esb.util.RemoteFileSystemException: org.apache.commons.net.ftp.FTPConnectionClosedException: Connection closed without indication.
    at org.jboss.internal.soa.esb.util.FtpImpl.initialize(FtpImpl.java:470)
    at org.jboss.internal.soa.esb.util.FtpsImpl.<init>(FtpsImpl.java:80)
    at org.jboss.soa.esb.util.RemoteFileSystemFactory.getRemoteFileSystem(RemoteFileSystemFactory.java:64)
    ... 16 more
Caused by: org.apache.commons.net.ftp.FTPConnectionClosedException: Connection closed without indication.
    at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:297)
    at org.apache.commons.net.ftp.FTP._connectAction_(FTP.java:364)
    at org.apache.commons.net.ftp.FTPClient._connectAction_(FTPClient.java:540)
    at org.apache.commons.net.ftp.FTPSClient._connectAction_(FTPSClient.java:167)
    at org.apache.commons.net.SocketClient.connect(SocketClient.java:178)
    at org.jboss.internal.soa.esb.util.FtpImpl.connect(FtpImpl.java:486)
    at org.jboss.internal.soa.esb.util.FtpsImpl.connect(FtpsImpl.java:165)
    at org.jboss.internal.soa.esb.util.FtpImpl.initialize(FtpImpl.java:435)
    ... 18 more

• The ESB configuration looks like below.

...
<ftp-provider name="FTPProvider" hostname="10.10.10.10" >
            <ftp-bus busid="TestFTPBus" >
                <ftp-message-filter
                    username="test"
                    password="test"                 
                    passive="true"
                    directory="/incoming"
                    input-suffix=".csv"
                    work-suffix=".esbWorking"
                    post-delete="false"
                    post-suffix=".COMPLETE"
                    error-delete="false"
                    error-suffix=".HAS_ERROR"
                />
            </ftp-bus>
          </ftp-provider>
...