Xinfeng.Chen created NET-658:

             Summary: FTPClient.retrieveFile hang due to data connection failure
                 Key: NET-658
             Project: Commons Net
          Issue Type: Bug
          Components: FTP
    Affects Versions: 3.6
         Environment: Server:

FileZilla Server 0.9.60 beta

windows 10 x64



Linux 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 
x86_64 GNU/Linux

java 1.8.0_11


            Reporter: Xinfeng.Chen
         Attachments: 2018-3-2 17-02-57.png

When retrieving files from FTP server, the client will open a data connection 
with an in-use port and failed in server, but the client hung in this 
function(no error, no exception, even the connection is closed due to timeout 
by server). This will occur after successfully getting hundreds of files (I 
have more than 4000 small files to be transferred, it will fail after 100+ or 
300+ or 400+ files. It always fail to FTP 4000 small files.)

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