Hello,
These are the faults I found with a low bitrate channel:
1. Upload of a file to the server
Line 590 input = new FileInputStream(pathFilename);
Line 591 result = ftpC.storeFile(serverFilename, input);
An exception is thrown with line 591 and caught by this catch block:
catch(SocketTimeoutException ste) {
text1 = ste.getMessage();
text2 = ste.getCause();
ste.printStackTrace();
}
text1 = Read timed out
text2 = null
printStackTrace():
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
at java.io.InputStreamReader.read(Unknown Source)
at java.io.BufferedReader.fill(Unknown Source)
at java.io.BufferedReader.read(Unknown Source)
at
org.apache.commons.net.io.CRLFLineReader.readLine(CRLFLineReader.java:58)
at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:310)
at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:290)
at org.apache.commons.net.ftp.FTP.getReply(FTP.java:632)
at
org.apache.commons.net.ftp.FTPClient.completePendingCommand(FTPClient.java:1561)
at
org.apache.commons.net.ftp.FTPClient.__storeFile(FTPClient.java:581)
at
org.apache.commons.net.ftp.FTPClient.storeFile(FTPClient.java:1704)
at InternetServer.putServerFiles(InternetServer.java:591)
2. Download of a file from the server:
Line 510 output = new FileOutputStream(pathFilename);
Line 511 result = ftpC.retrieveFile(serverFilename, output);
The method retrieveFile() returns false, no exception is thrown.
3. Logout from the server
Line 218 ftpC.logout();
An exception is thrown with line 218 and caught by this catch block:
catch(IOException ioe) {
ioe.printStackTrace();
}
printStackTrace():
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
at java.io.InputStreamReader.read(Unknown Source)
at java.io.BufferedReader.fill(Unknown Source)
at java.io.BufferedReader.read(Unknown Source)
at
org.apache.commons.net.io.CRLFLineReader.readLine(CRLFLineReader.java:58)
at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:310)
at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:290)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:474)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:547)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:596)
at org.apache.commons.net.ftp.FTP.quit(FTP.java:804)
at org.apache.commons.net.ftp.FTPClient.logout(FTPClient.java:941)
at InternetServer.ftp(InternetServer.java:218)
-----Ursprüngliche Nachricht-----
From: sebb
Sent: Thursday, July 26, 2012 10:44 AM
To: Commons Users List
Subject: Re: [net] FTP client fails if a modem connection is used
On 25 July 2012 18:56, Gregor Schmidt <gregor.schm...@utanet.at> wrote:
Hello,
I use the FTPClient class (API 3.0.1) for FTP file transfers. It works
fine as long as the internet connection is fast enough, e. g. 150 kbit/s
and above. With a modem connection at 56 kbit/s I can connect the server
but I get a read time out after the transfer of the file to the server
(size 31 kByte). Files on the server couldn't be downloaded at all.
Available FTP programs (WS-FTP etc.) don't have any problems with such a
low bitrate connection.
It may be that an appropriate setting of the various timeout values could
solve the problem. Unfortunately I'm not a specialist in FTP or networking
in general. The current settings are:
DefaultTimeout = 0 (default)
SocketTimeout = 0 (default)
ConnectTimeout = 0 (default)
ControlKeepAliveTimeout = 300 seconds, set according to the example in the
API description
ControlKeepAliveReplyTimeout = 1000 milliseconds (default)
Does somebody know an appropriate setting of the timeouts or a different
solution for my problem?
What is the exact error you are getting?
Best regards,
Gregor
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