34d104f created the issue

The application (4.1.2) has started to hang when one sub directory on logged-in server exceeded 4760 files. The problem appears faster (within a few minutes) if the large directory is viewed, but eventually (within 5 minutes) it hangs in any directory on the server. It is also difficult to add any more files to this large directory. After all files are sent the applications hangs while "Listing directory xxxx". see the log drawer below.

TYPE I
200 Switching to Binary mode.
PORT 192,168,1,51,201,179
200 PORT command successful. Consider using PASV.
STOR /var/www/graphics/chip/1970chevcanada_19.jpg
150 Ok to send data.
226 File receive OK.
QUIT
221 Goodbye.