Hi Cyril
Thanks for this - is this with commons-net version 1.4 or the 2.0
prerelease? If it is 1.4, can you try it with the 2.0 prerelease and see
if the error still occurs?
The prerelease is here:
http://people.apache.org/~rwinston/commons-net-2.0/commons-net-ftp-2.0.0-SNAPSHOT.jar
You will need Java 5 or later.
Thanks
Rory
Cyril Bouteille wrote:
Hi Rory,
Please find below the output of the listener. Let me know what you think!
220 envmgr2 Microsoft FTP Service (Version 5.0).
USER FTP_USPS_CONFIRM
331 Password required for FTP_USPS_CONFIRM.
PASS ***
230-Welcome to Envelope Manager FTP
230 User FTP_USPS_CONFIRM logged in.
INFO 10:53:44 MailScanJob.runJob: Connected to ftp.envmgr.com as
FTP_USPS_CONFIRM -- 230-Welcome to Envelope Manager FTP
230 User FTP_USPS_CONFIRM logged in.
CWD /confirm
250 CWD command successful.
PWD
257 "/confirm" is current directory.
INFO 10:53:44 MailScanJob.runJob: MailScan Folder: /confirm
TYPE A
200 Type set to A.
INFO 10:53:46 MailScanJob.processMailScans: Retrieving list of files
in directory...
SYST
215 Windows_NT version 5.0
PASV
227 Entering Passive Mode (65,203,54,10,5,104).
LIST
125 Data connection already open; Transfer starting.
hangs there for a while... and then blows up with SocketException:
connection reset.
Rory Winston wrote:
Hi Cyril
Can you try again with 2.0, but this time can you attach a
PrintCommandListener to the FTPClient instance? You can see how to do
this here:
FTPClient client = new FTPClient();
client.addProtocolCommandListener(new PrintCommandListener(new
PrintWriter(System.out)));
This will log all FTP traffic to stdout. When you have done this, can
you send the relevant output?
A more comprehensive way to try and locate the problem is to download
the source distribution as well:
http://people.apache.org/~rwinston/commons-net-2.0/commons-net-2.0.0-SNAPSHOT-src.zip
And then run your test program from within your IDE, after attaching
a breakpoint at the relevant location.
Is the FTP server in question publicly accessible?
Thanks
Rory
Cyril Bouteille wrote:
Hi Rory,
I just tried your 2.0 snapshot and I'm getting the exact same issue
(see log below).
I'm assuming I'm using the new jar correctly as the line #s in the
stack trace have changed, but please let me know if it's not the case.
Any other idea? Is there any way to turn on debug logging for this lib?
Thank you,
INFO 08:58:06 MailScanJob.runJob: Connected to ftp.envmgr.com as xxx --
220 envmgr2 Microsoft FTP Service (Version 5.0).
331 Password required for xxx
230-Welcome to Envelope Manager FTP
230 User xxx logged in.
INFO 08:58:06 MailScanJob.runJob: MailScan Folder: /confirm
INFO 08:58:08 MailScanJob.processMailScans: Retrieving list of files
in directory...
SEVERE 09:01:20 MailScanJob.runJob: MailScanJob.runJob: Exception
java.net.SocketException: Connection reset
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:168)
at
sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:411)
at
sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:453)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:183)
at java.io.InputStreamReader.read(InputStreamReader.java:167)
at java.io.BufferedReader.fill(BufferedReader.java:136)
at java.io.BufferedReader.readLine(BufferedReader.java:299)
at java.io.BufferedReader.readLine(BufferedReader.java:362)
at
org.apache.commons.net.ftp.FTPFileEntryParserImpl.readNextEntry(FTPFileEntryParserImpl.java:53)
at
org.apache.commons.net.ftp.FTPListParseEngine.readStream(FTPListParseEngine.java:152)
at
org.apache.commons.net.ftp.FTPListParseEngine.readServerList(FTPListParseEngine.java:100)
at
org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2314)
at
org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2281)
at
org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2058)
at
org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2105)
at
peerflix.job.trade.MailScanJob.processMailScans(MailScanJob.java:136)
at peerflix.job.trade.MailScanJob.runJob(MailScanJob.java:87)
at peerflix.job.PfxJob.main(PfxJob.java:97)
Rory Winston wrote:
Hi Cyril
If you are running Java 1.5 or later, you can try the latest
snapshot of commons-net 2.0 and see if that fixes the issue:
http://people.apache.org/~rwinston/commons-net-2.0/commons-net-2.0.0-SNAPSHOT.jar
Rory
Cyril Bouteille wrote:
Thanks for your reply Mark.
This exception occurs on a simple 'ls' (listFiles()) in a
directory with less than 100 files. This command returns within a
couple seconds @ ftp cli. But the commons.net program can hang for
hours and then exit with this "connection reset" exception.
We do use the same FTP server in dev and prod. It's one from the
USPS. Only the client network and machine the commons.net program
runs on is different.
It feels like a network connectivity issue, but I don't understand
how the ftp cli and commons.net library behave differently in a
way explaining this...
Any idea?
Mark Fortner wrote:
Sounds like your production environment has different FTP socket
timeout settings. Does this exception occur with a large file in
your production environment? If so, is that same file available
in your dev environment?
You may want to compare the settings on FTP servers and make sure
they're the same.
Hope this helps,
Mark
PS Don't forget to prefix the subject lines of your email with
"[VFS]" as this list is shared by a lot of different groups.
On Friday, December 29, 2006, at 07:57 PM, Cyril Bouteille wrote:
Hello,
I've a Java 1.5 program retrieving files over ftp using net
1.4.1, which works fine in our dev environment, but throws the
exception below in our production environment on the listFiles()
call.
1) I am calling enterLocalPassiveMode() to use passive mode, and
2) I'm able to list files with the ftp cli client on the same
production machine that the Java program is running on, so
network ACLs seem ok
Is there anything else I am missing?
I'm at loss on how to resolve this issue and would appreciate
your input.
Thanks,
SEVERE 16:13:14 MailScanJob.runJob: Exception
java.net.SocketException: Connection reset
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:168)
at
sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:411)
at
sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:453)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:183)
at java.io.InputStreamReader.read(InputStreamReader.java:167)
at java.io.BufferedReader.fill(BufferedReader.java:136)
at java.io.BufferedReader.readLine(BufferedReader.java:299)
at java.io.BufferedReader.readLine(BufferedReader.java:362)
at
org.apache.commons.net.ftp.FTPFileEntryParserImpl.readNextEntry(FTPFileEntryParserImpl.java:95)
at
org.apache.commons.net.ftp.FTPListParseEngine.readStream(FTPListParseEngine.java:150)
at
org.apache.commons.net.ftp.FTPListParseEngine.readServerList(FTPListParseEngine.java:98)
at
org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2396)
at
org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2364)
at
org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2141)
at
org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2188)
at
peerflix.job.trade.MailScanJob.processMailScans(MailScanJob.java:136)
at peerflix.job.trade.MailScanJob.runJob(MailScanJob.java:87)
at peerflix.job.PfxJob.main(PfxJob.java:97)
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