Hi,
Lets go ...
1. We transfer many small files (50KB to 150KB)
2. I'm using log4j in my app. So, I've added the following lines to my
property configuration file:
log4j.rootLogger=warn, file
log4j.logger.org.apache.ftpserver=warn, fileftp
log4j.logger.org.apache.mina=warn, fileftp
log4j.appender.file.MaxBackupIndex=4
log4j.appender.file.layout.ConversionPattern=%d{ISO8601} %t %5p %c{1}\:%L
[%X{remoteIp}:%X{remotePort}] - %m%n
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.File=./log/myapp-log.log
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.MaxFileSize=25MB
log4j.appender.fileftp.MaxBackupIndex=4
log4j.appender.fileftp.layout.ConversionPattern=%d{ISO8601} %t %5p %c{1}\:%L
[%X{remoteIp}:%X{remotePort}] - %m%n
log4j.appender.fileftp.layout=org.apache.log4j.PatternLayout
log4j.appender.fileftp.File=./log/myapp-ftp-log.log
log4j.appender.fileftp=org.apache.log4j.RollingFileAppender
log4j.appender.fileftp.MaxFileSize=25MB
3. I get the message reading the log (cat /var/log/messages). I think this
could be set to off in some /proc configuration file. I'm not sure of that..
4. Obs: "Sentry" is my server name in message: "sentry kernel: possible SYN
flooding on port 21"
Best regards,
2011/3/15 Håkon Sagehaug <[email protected]>
> Hi all,
>
> It could be the same error, are you seeing it with large file or just many
> files? How are you configurign the log, I see you get more out then me.
> I'll
> try to see into the kernel log to see if I se any "sentry kernel: possible
> SYN flooding on port 21", can you remember the logfile you found that in?
>
> Cheers, Håkon
>
> 2011/3/14 Danilo Rosetto Muñoz <[email protected]>
>
> > Hi all ...
> >
> > I think this is similar with some connections errors I've reported here.
> My
> > email subject: Connection Errors. The email:
> >
> > Hi all,
> > > I'm still getting these errors ... Maybe I have some broken connections
> > by
> > > client once some of than are radio link. In other cases we have fiber
> and
> > I
> > > can say you they are stable.
> > > I could notice we get to much of these errors when we have to many data
> > to
> > > transfer from client to server.
> > > I could get the following logging on kernel:
> > > Feb 22 16:45:42 sentry kernel: possible SYN flooding on port 21.
> Sending
> > > cookies.
> > > May linux close connection in order to prevent attacks?
> > > Best regards,
> > > - Hide quoted text -
> > >
> > > On Fri, Dec 10, 2010 at 2:00 PM, David Latorre <[email protected]>
> wrote:
> > > you sure it's not the client side the one which is closing the
> > > connection?
> > > 2010/12/10 Danilo Rosetto Muñoz <[email protected]>:
> > > > Hi all,
> > > >
> > > > I'm getting to many errors on my ftp server. The scenario is:
> > > >
> > > > - I have ftp server embedded on my app
> > > > - I have about 50 connections:
> > > > - Its about 15 ~ 30 computers
> > > > - Its about 2 ~ 3 connections per IP
> > > > - Config (server):
> > > > - maxlogins= 400
> > > > - maxthreads = 20
> > > > - Config (user):
> > > > - idletime = 1200
> > > > - maxloginnumber = 0
> > > > - maxloginperip = 0
> > > > - The error occurs to any of computers. I mean, it doesnt occur for
> > an
> > > > specific IP
> > > > - The network is stable (FO)
> > > >
> > > > I dont know if I can post log here because the email size ... I dont,
> > > please
> > > > let me know.
> > > >
> > > > This is the log:
> > > >
> > > >> 2010-12-10 11:50:32,088 pool-3-thread-8 WARN FtpLoggingFilter:122 [
> > > >> 172.18.0.22:2479] - EXCEPTION :
> > > >
> > > > java.io.IOException: Connection reset by peer
> > > >
> > > > at sun.nio.ch.FileDispatcher.read0(Native Method)
> > > >
> > > > at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> > > >
> > > > at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:251)
> > > >
> > > > at sun.nio.ch.IOUtil.read(IOUtil.java:224)
> > > >
> > > > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:254)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:202)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:42)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:620)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:598)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:587)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:61)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:969)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> > > >
> > > > at java.lang.Thread.run(Thread.java:636)
> > > >
> > > > 2010-12-10 11:50:32,089 pool-3-thread-8 ERROR DefaultFtpHandler:156 [
> > > >> 172.18.0.22:2479] - Exception caught, closing session
> > > >
> > > > java.io.IOException: Connection reset by peer
> > > >
> > > > at sun.nio.ch.FileDispatcher.read0(Native Method)
> > > >
> > > > at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> > > >
> > > > at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:251)
> > > >
> > > > at sun.nio.ch.IOUtil.read(IOUtil.java:224)
> > > >
> > > > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:254)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:202)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:42)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:620)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:598)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:587)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:61)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:969)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> > > >
> > > > at java.lang.Thread.run(Thread.java:636)
> > > >
> > > >
> > > > And this:
> > > >
> > > >> 2010-12-10 11:55:17,885 pool-3-thread-10 WARN FtpLoggingFilter:122
> [
> > > >> 172.18.0.13:4485] - EXCEPTION :
> > > >
> > > > org.apache.mina.core.write.WriteToClosedSessionException
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.clearWriteRequestQueue(AbstractPollingIoProcessor.java:573)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.removeNow(AbstractPollingIoProcessor.java:534)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.removeSessions(AbstractPollingIoProcessor.java:497)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.access$600(AbstractPollingIoProcessor.java:61)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:974)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> > > >
> > > > at java.lang.Thread.run(Thread.java:636)
> > > >
> > > > 2010-12-10 11:55:17,885 pool-3-thread-10 WARN DefaultFtpHandler:151
> [
> > > >> 172.18.0.13:4485] - Client closed connection before all replies
> could
> > > be
> > > >> sent, last reply was HeapBuffer[pos=0 lim=14 cap=14: 32 32 31 20 47
> 6F
> > > 6F 64
> > > >> 62 79 65 2E 0D 0A]
> > > >
> > > >
> > > > Some more info (netstat -s). See resets sent:
> > > > Tcp:
> > > > 1052 active connections openings
> > > > 2290662 passive connection openings
> > > > 627 failed connection attempts
> > > > 12824 connection resets received
> > > > 171 connections established
> > > > 1056516018 segments received
> > > > 890885614 segments send out
> > > > 268258 segments retransmited
> > > > 0 bad segments received.
> > > > 132128 resets sent
> > > >
> > > > Thanks in advanced,
> > > >
> > > > --
> > > > Danilo Rosetto Muñoz
> > > > [email protected]
> > > > http://br.linkedin.com/in/danilomunoz
> > > >
> > >
> > > 2010/12/10 Danilo Rosetto Muñoz <[email protected]>:
> > > > Hi all,
> > > >
> > > > I'm getting to many errors on my ftp server. The scenario is:
> > > >
> > > > - I have ftp server embedded on my app
> > > > - I have about 50 connections:
> > > > - Its about 15 ~ 30 computers
> > > > - Its about 2 ~ 3 connections per IP
> > > > - Config (server):
> > > > - maxlogins= 400
> > > > - maxthreads = 20
> > > > - Config (user):
> > > > - idletime = 1200
> > > > - maxloginnumber = 0
> > > > - maxloginperip = 0
> > > > - The error occurs to any of computers. I mean, it doesnt occur for
> > an
> > > > specific IP
> > > > - The network is stable (FO)
> > > >
> > > > I dont know if I can post log here because the email size ... I dont,
> > > please
> > > > let me know.
> > > >
> > > > This is the log:
> > > >
> > > >> 2010-12-10 11:50:32,088 pool-3-thread-8 WARN FtpLoggingFilter:122 [
> > > >> 172.18.0.22:2479] - EXCEPTION :
> > > >
> > > > java.io.IOException: Connection reset by peer
> > > >
> > > > at sun.nio.ch.FileDispatcher.read0(Native Method)
> > > >
> > > > at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> > > >
> > > > at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:251)
> > > >
> > > > at sun.nio.ch.IOUtil.read(IOUtil.java:224)
> > > >
> > > > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:254)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:202)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:42)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:620)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:598)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:587)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:61)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:969)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> > > >
> > > > at java.lang.Thread.run(Thread.java:636)
> > > >
> > > > 2010-12-10 11:50:32,089 pool-3-thread-8 ERROR DefaultFtpHandler:156 [
> > > >> 172.18.0.22:2479] - Exception caught, closing session
> > > >
> > > > java.io.IOException: Connection reset by peer
> > > >
> > > > at sun.nio.ch.FileDispatcher.read0(Native Method)
> > > >
> > > > at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> > > >
> > > > at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:251)
> > > >
> > > > at sun.nio.ch.IOUtil.read(IOUtil.java:224)
> > > >
> > > > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:254)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:202)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.transport.socket.nio.NioProcessor.read(NioProcessor.java:42)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:620)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:598)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:587)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:61)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:969)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> > > >
> > > > at java.lang.Thread.run(Thread.java:636)
> > > >
> > > >
> > > > And this:
> > > >
> > > >> 2010-12-10 11:55:17,885 pool-3-thread-10 WARN FtpLoggingFilter:122
> [
> > > >> 172.18.0.13:4485] - EXCEPTION :
> > > >
> > > > org.apache.mina.core.write.WriteToClosedSessionException
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.clearWriteRequestQueue(AbstractPollingIoProcessor.java:573)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.removeNow(AbstractPollingIoProcessor.java:534)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.removeSessions(AbstractPollingIoProcessor.java:497)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor.access$600(AbstractPollingIoProcessor.java:61)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:974)
> > > >
> > > > at
> > > >>
> > >
> >
> org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:64)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> > > >
> > > > at
> > > >>
> > >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> > > >
> > > > at java.lang.Thread.run(Thread.java:636)
> > > >
> > > > 2010-12-10 11:55:17,885 pool-3-thread-10 WARN DefaultFtpHandler:151
> [
> > > >> 172.18.0.13:4485] - Client closed connection before all replies
> could
> > > be
> > > >> sent, last reply was HeapBuffer[pos=0 lim=14 cap=14: 32 32 31 20 47
> 6F
> > > 6F 64
> > > >> 62 79 65 2E 0D 0A]
> > > >
> > > >
> > > > Some more info (netstat -s). See resets sent:
> > > > Tcp:
> > > > 1052 active connections openings
> > > > 2290662 passive connection openings
> > > > 627 failed connection attempts
> > > > 12824 connection resets received
> > > > 171 connections established
> > > > 1056516018 segments received
> > > > 890885614 segments send out
> > > > 268258 segments retransmited
> > > > 0 bad segments received.
> > > > 132128 resets sent
> > > >
> > > > Thanks in advanced,
> > > >
> > > > --
> > > > Danilo Rosetto Muñoz
> > > > [email protected]
> > > > http://br.linkedin.com/in/danilomunoz
> > > >
> > >
> > >
> > > 2011/3/14 Håkon Sagehaug <[email protected]>
> > > The connection timeout was because the idleTimeout was to short. But
> the
> > > client is still having some trouble when uploading large amounts of
> files
> > > simultaneously. I think maybe it's some sort of limitation in the
> client
> > > side. I've set max-login to 100 and the are enough ports available. I
> run
> > > in
> > > passive mode.
> > >
> > > I'm trying various configurations on the client to see if it has any
> > > effect.
> > >
> > > Cheers, Håkon
> > >
> > > On 14 March 2011 11:43, Niklas Gustavsson <[email protected]>
> wrote:
> > >
> > > > 2011/3/11 Håkon Sagehaug <[email protected]>:
> > > > > We use Mina FtpServer in on of our applications as a way to upload
> > > files.
> > > > > Normally this goes without problems, but we observe with a large
> > number
> > > > of
> > > > > files that the client(Jftp[1]), can open connections to the machine
> > > > running
> > > > > the ftp server.
> > > > >
> > > > > The client negotiates a socket for the data transfer and tries to
> > > > connect,
> > > > > but there is no socket on the server open. So I was wondering if
> > > anybody
> > > > > else have experienced something similar.
> > > >
> > > > For my understanding: clients have problem establishing the data
> > > > connection, you don't see any problems with creating connections for
> > > > the control connection? In the server log, do you see any activity
> > > > when the client is supposed to connect?
> > > >
> > > > How many data connections ports are available for clients? FtpServer
> > > > only allows one data connection per port. Have you checked netstat -a
> > > > to see that you have free sockets available?
> > > >
> > > > /niklas
> > > >
> > > The connection timeout was because the idleTimeout was to short. But
> the
> > > client is still having some trouble when uploading large amounts of
> files
> > > simultaneously. I think maybe it's some sort of limitation in the
> client
> > > side. I've set max-login to 100 and the are enough ports available. I
> run
> > > in
> > > passive mode.
> > > I'm trying various configurations on the client to see if it has any
> > > effect.
> > >
> > > Cheers, Håkon
> > >
> > > On 14 March 2011 11:43, Niklas Gustavsson <[email protected]>
> wrote:
> > >
> > > > 2011/3/11 Håkon Sagehaug <[email protected]>:
> > > > > We use Mina FtpServer in on of our applications as a way to upload
> > > files.
> > > > > Normally this goes without problems, but we observe with a large
> > number
> > > > of
> > > > > files that the client(Jftp[1]), can open connections to the machine
> > > > running
> > > > > the ftp server.
> > > > >
> > > > > The client negotiates a socket for the data transfer and tries to
> > > > connect,
> > > > > but there is no socket on the server open. So I was wondering if
> > > anybody
> > > > > else have experienced something similar.
> > > >
> > > > For my understanding: clients have problem establishing the data
> > > > connection, you don't see any problems with creating connections for
> > > > the control connection? In the server log, do you see any activity
> > > > when the client is supposed to connect?
> > > >
> > > > How many data connections ports are available for clients? FtpServer
> > > > only allows one data connection per port. Have you checked netstat -a
> > > > to see that you have free sockets available?
> > > >
> > > > /niklas
> > > >
> > > I'm trying various configurations on the client to see if it has any
> > > effect.
> > > Cheers, Håkon
> > >
> > > On 14 March 2011 11:43, Niklas Gustavsson <[email protected]>
> wrote:
> > >
> > > > 2011/3/11 Håkon Sagehaug <[email protected]>:
> > > > > We use Mina FtpServer in on of our applications as a way to upload
> > > files.
> > > > > Normally this goes without problems, but we observe with a large
> > number
> > > > of
> > > > > files that the client(Jftp[1]), can open connections to the machine
> > > > running
> > > > > the ftp server.
> > > > >
> > > > > The client negotiates a socket for the data transfer and tries to
> > > > connect,
> > > > > but there is no socket on the server open. So I was wondering if
> > > anybody
> > > > > else have experienced something similar.
> > > >
> > > > For my understanding: clients have problem establishing the data
> > > > connection, you don't see any problems with creating connections for
> > > > the control connection? In the server log, do you see any activity
> > > > when the client is supposed to connect?
> > > >
> > > > How many data connections ports are available for clients? FtpServer
> > > > only allows one data connection per port. Have you checked netstat -a
> > > > to see that you have free sockets available?
> > > >
> > > > /niklas
> > > >
> > > Cheers, Håkon
> > > On 14 March 2011 11:43, Niklas Gustavsson <[email protected]>
> wrote:
> > >
> > > > 2011/3/11 Håkon Sagehaug <[email protected]>:
> > > > > We use Mina FtpServer in on of our applications as a way to upload
> > > files.
> > > > > Normally this goes without problems, but we observe with a large
> > number
> > > > of
> > > > > files that the client(Jftp[1]), can open connections to the machine
> > > > running
> > > > > the ftp server.
> > > > >
> > > > > The client negotiates a socket for the data transfer and tries to
> > > > connect,
> > > > > but there is no socket on the server open. So I was wondering if
> > > anybody
> > > > > else have experienced something similar.
> > > >
> > > > For my understanding: clients have problem establishing the data
> > > > connection, you don't see any problems with creating connections for
> > > > the control connection? In the server log, do you see any activity
> > > > when the client is supposed to connect?
> > > >
> > > > How many data connections ports are available for clients? FtpServer
> > > > only allows one data connection per port. Have you checked netstat -a
> > > > to see that you have free sockets available?
> > > >
> > > > /niklas
> > > >
> > > On 14 March 2011 11:43, Niklas Gustavsson <[email protected]>
> wrote:
> > > > 2011/3/11 Håkon Sagehaug <[email protected]>:
> > > > > We use Mina FtpServer in on of our applications as a way to upload
> > > files.
> > > > > Normally this goes without problems, but we observe with a large
> > number
> > > > of
> > > > > files that the client(Jftp[1]), can open connections to the machine
> > > > running
> > > > > the ftp server.
> > > > >
> > > > > The client negotiates a socket for the data transfer and tries to
> > > > connect,
> > > > > but there is no socket on the server open. So I was wondering if
> > > anybody
> > > > > else have experienced something similar.
> > > >
> > > > For my understanding: clients have problem establishing the data
> > > > connection, you don't see any problems with creating connections for
> > > > the control connection? In the server log, do you see any activity
> > > > when the client is supposed to connect?
> > > >
> > > > How many data connections ports are available for clients? FtpServer
> > > > only allows one data connection per port. Have you checked netstat -a
> > > > to see that you have free sockets available?
> > > >
> > > > /niklas
> > > >
> > > > 2011/3/11 Håkon Sagehaug <[email protected]>:
> > > > > We use Mina FtpServer in on of our applications as a way to upload
> > > files.
> > > > > Normally this goes without problems, but we observe with a large
> > number
> > > > of
> > > > > files that the client(Jftp[1]), can open connections to the machine
> > > > running
> > > > > the ftp server.
> > > > >
> > > > > The client negotiates a socket for the data transfer and tries to
> > > > connect,
> > > > > but there is no socket on the server open. So I was wondering if
> > > anybody
> > > > > else have experienced something similar.
> > > >
> > > > For my understanding: clients have problem establishing the data
> > > > connection, you don't see any problems with creating connections for
> > > > the control connection? In the server log, do you see any activity
> > > > when the client is supposed to connect?
> > > >
> > > > How many data connections ports are available for clients? FtpServer
> > > > only allows one data connection per port. Have you checked netstat -a
> > > > to see that you have free sockets available?
> > > >
> > > > /niklas
> > > >
> >
> > I don't have the time to look into this with detail right now but are
> > >
> > Hi,
> > >
> >
> >
> >
> > --
> > Danilo Rosetto Muñoz
> > [email protected]
> > http://br.linkedin.com/in/danilomunoz
> >
>
--
Danilo Rosetto Muñoz
[email protected]
http://br.linkedin.com/in/danilomunoz
