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https://issues.apache.org/jira/browse/FTPSERVER-111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12543296
 ] 

Frank commented on FTPSERVER-111:
---------------------------------

I have a similar error (after your patch) on MacOSX in active mode (Java 1.4):

[ WARN] 2007-11-17 18:34:36,050 FtpDataConnection.getDataSocket()
java.net.BindException: Address already in use
        at java.net.PlainSocketImpl.socketBind(Native Method)
        at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
        at java.net.Socket.bind(Socket.java:562)
        at java.net.Socket.<init>(Socket.java:364)
        at java.net.Socket.<init>(Socket.java:266)
        at 
org.apache.ftpserver.IODataConnectionFactory.createDataSocket(IODataConnectionFactory.java:265)
        at 
org.apache.ftpserver.IODataConnectionFactory.openConnection(IODataConnectionFactory.java:232)
        at org.apache.ftpserver.command.LIST.execute(LIST.java:92)
        at 
org.apache.ftpserver.listener.FtpProtocolHandler.service(FtpProtocolHandler.java:195)
        at 
org.apache.ftpserver.listener.FtpProtocolHandler.onRequestReceived(FtpProtocolHandler.java:122)
        at 
org.apache.ftpserver.listener.io.IOConnection.run(IOConnection.java:153)
        at java.lang.Thread.run(Thread.java:613)


> Data channel cannot be opened in active mode
> --------------------------------------------
>
>                 Key: FTPSERVER-111
>                 URL: https://issues.apache.org/jira/browse/FTPSERVER-111
>             Project: FtpServer
>          Issue Type: Bug
>          Components: Core
>         Environment: Solaris, Linux, maybe others (Windows seems to work)
>            Reporter: Rico Neubauer
>         Attachments: apache-ftpserver-111-patch.txt
>
>
> FTP-Server with active mode running on Solaris/Linux
> Client connects to the server with active mode.
> Issue list command -> ok
> issue second list command -> client  hangs
> Client commands:
> 220 Service ready for new user.
> Name (localhost:username): test
> 331 User name okay, need password for test.
> Password:
> 230 User logged in, proceed.
> Remote system type is UNIX.
> ftp> 
> ftp> 
> ftp> ls
> 200 Command PORT okay.
> 150 File status okay; about to open data connection.
> directory1
> directory2
> 226 Closing data connection.
> 11 bytes received in 0.0099 seconds (1.08 Kbytes/s)
> ftp> ls
> 200 Command PORT okay.
> 150 File status okay; about to open data connection.
> <Client hangs here>
> Server-Log:
> 15:38:08,581 INFO  [UserManagerImpl] authenticate: Authentication for user 
> <test> complete.
> 15:38:08,583 DEBUG [UserManagerImpl] setUserConfigurations: Setting up user 
> permissions...
> 15:38:08,584 DEBUG [UserManagerImpl] setUserConfigurations: Write permission 
> granted for user <test>
> 15:38:08,597 DEBUG [FTPServerFtplet] onLogin:PASS *****
> 15:38:08,627 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] WRITE: 230 
> User logged in, proceed.
> 15:38:08,628 INFO  [PASS] Login success - test
> 15:38:08,629 DEBUG [ExecutorFilter] Exiting since queue is empty for 
> /10.0.0.239:33204
> 15:38:08,629 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] SENT: 230 
> User logged in, proceed.
> 15:38:08,630 DEBUG [ExecutorFilter] Launching thread for /10.0.0.239:33204
> 15:38:08,631 DEBUG [ExecutorFilter] Exiting since queue is empty for 
> /10.0.0.239:33204
> 15:38:08,631 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] RECEIVED: SYST
> 15:38:08,632 DEBUG [ExecutorFilter] Launching thread for /10.0.0.239:33204
> 15:38:08,632 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] WRITE: 215 
> UNIX Type: Apache FTP Server
> 15:38:08,634 DEBUG [ExecutorFilter] Exiting since queue is empty for 
> /10.0.0.239:33204
> 15:38:08,634 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] SENT: 215 
> UNIX Type: Apache FTP Server
> 15:38:08,635 DEBUG [ExecutorFilter] Launching thread for /10.0.0.239:33204
> 15:38:08,635 DEBUG [ExecutorFilter] Exiting since queue is empty for 
> /10.0.0.239:33204
> 15:38:11,153 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] RECEIVED: 
> PORT 10,0,0,239,129,181
> 15:38:11,156 DEBUG [ExecutorFilter] Launching thread for /10.0.0.239:33204
> 15:38:11,157 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] WRITE: 510 
> PORT is disabled.
> 15:38:11,158 DEBUG [ExecutorFilter] Exiting since queue is empty for 
> /10.0.0.239:33204
> 15:38:11,158 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] SENT: 510 
> PORT is disabled.
> 15:38:11,159 DEBUG [ExecutorFilter] Launching thread for /10.0.0.239:33204
> 15:38:11,160 DEBUG [ExecutorFilter] Exiting since queue is empty for 
> /10.0.0.239:33204
> 15:38:11,160 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] RECEIVED: NLST
> 15:38:11,161 DEBUG [ExecutorFilter] Launching thread for /10.0.0.239:33204
> 15:38:11,161 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] WRITE: 150 
> File status okay; about to open data connection.
> 15:38:11,162 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] SENT: 150 
> File status okay; about to open data connection.
> 15:38:11,167 WARN  [IODataConnectionFactory] FtpDataConnection.getDataSocket()
> java.lang.NullPointerException
>       at java.net.Socket.<init>(Socket.java:358)
>       at java.net.Socket.<init>(Socket.java:208)
>       at 
> org.apache.ftpserver.IODataConnectionFactory.createDataSocket(IODataConnectionFactory.java:261)
>       at 
> org.apache.ftpserver.IODataConnectionFactory.openConnection(IODataConnectionFactory.java:232)
>       at org.apache.ftpserver.command.NLST.execute(NLST.java:81)
>       at 
> org.apache.ftpserver.listener.FtpProtocolHandler.service(FtpProtocolHandler.java:195)
>       at 
> org.apache.ftpserver.listener.FtpProtocolHandler.onRequestReceived(FtpProtocolHandler.java:122)
>       at 
> org.apache.ftpserver.listener.mina.MinaFtpProtocolHandler.messageReceived(MinaFtpProtocolHandler.java:106)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.messageReceived(AbstractIoFilterChain.java:569)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:298)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain.access$1200(AbstractIoFilterChain.java:53)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:647)
>       at 
> org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java:220)
>       at 
> org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(ExecutorFilter.java:266)
>       at 
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
>       at 
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
>       at java.lang.Thread.run(Thread.java:595)
> 15:38:11,174 DEBUG [NLST] Exception getting the output data stream
> java.lang.NullPointerException
>       at java.net.Socket.<init>(Socket.java:358)
>       at java.net.Socket.<init>(Socket.java:208)
>       at 
> org.apache.ftpserver.IODataConnectionFactory.createDataSocket(IODataConnectionFactory.java:261)
>       at 
> org.apache.ftpserver.IODataConnectionFactory.openConnection(IODataConnectionFactory.java:232)
>       at org.apache.ftpserver.command.NLST.execute(NLST.java:81)
>       at 
> org.apache.ftpserver.listener.FtpProtocolHandler.service(FtpProtocolHandler.java:195)
>       at 
> org.apache.ftpserver.listener.FtpProtocolHandler.onRequestReceived(FtpProtocolHandler.java:122)
>       at 
> org.apache.ftpserver.listener.mina.MinaFtpProtocolHandler.messageReceived(MinaFtpProtocolHandler.java:106)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.messageReceived(AbstractIoFilterChain.java:569)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:298)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain.access$1200(AbstractIoFilterChain.java:53)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:647)
>       at 
> org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java:220)
>       at 
> org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(ExecutorFilter.java:266)
>       at 
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
>       at 
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
>       at java.lang.Thread.run(Thread.java:595)
> 15:38:11,175 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] WRITE: 425 
> Can't open data connection.
> 15:38:11,176 DEBUG [ExecutorFilter] Exiting since queue is empty for 
> /10.0.0.239:33204
> 15:38:11,176 INFO  [MinaFtpProtocolHandler] [/10.0.0.239:33204] SENT: 425 
> Can't open data connection.
> 15:38:11,177 DEBUG [ExecutorFilter] Launching thread for /10.0.0.239:33204
> 15:38:11,177 DEBUG [ExecutorFilter] Exiting since queue is empty for 
> /10.0.0.239:33204
> 15:39:38,458 WARN  [MinaFtpProtocolHandler] [/10.0.0.239:33204] EXCEPTION:
> org.apache.mina.filter.codec.ProtocolDecoderException: 
> java.nio.charset.MalformedInputException: Input length = 1 (Hexdump: empty)
>       at 
> org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:160)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:298)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain.access$1200(AbstractIoFilterChain.java:53)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:647)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain$HeadFilter.messageReceived(AbstractIoFilterChain.java:498)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:298)
>       at 
> org.apache.mina.common.support.AbstractIoFilterChain.fireMessageReceived(AbstractIoFilterChain.java:292)
>       at 
> org.apache.mina.transport.socket.nio.SocketIoProcessor.read(SocketIoProcessor.java:253)
>       at 
> org.apache.mina.transport.socket.nio.SocketIoProcessor.process(SocketIoProcessor.java:223)
>       at 
> org.apache.mina.transport.socket.nio.SocketIoProcessor.access$500(SocketIoProcessor.java:44)
>       at 
> org.apache.mina.transport.socket.nio.SocketIoProcessor$Worker.run(SocketIoProcessor.java:524)
>       at 
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:39)
>       at 
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
>       at 
> edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
>       at java.lang.Thread.run(Thread.java:595)
> Caused by: java.nio.charset.MalformedInputException: Input length = 1
>       at java.nio.charset.CoderResult.throwException(CoderResult.java:260)
>       at org.apache.mina.common.ByteBuffer.getString(ByteBuffer.java:953)
>       at 
> org.apache.mina.filter.codec.textline.TextLineDecoder.decodeAuto(TextLineDecoder.java:180)
>       at 
> org.apache.mina.filter.codec.textline.TextLineDecoder.decode(TextLineDecoder.java:113)
>       at 
> org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:153)
>       ... 14 more

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