Error During Ftp Transfer Java.net.unknownhostexception Ant
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up FTP site works but I'm unable to connect from Java program. I get java.net.UnknownHostException up vote 3 down vote favorite Greetings folks. I have this weird problem. In the project I'm working on now, I need to upload a file to a FTP site. I have written many programs that do this before and they have worked just fine. But this particular site is giving me trouble. When I try to upload the file from the program, I get this to be specific: java.net.UnknownHostException: ftp://site.com However when I try to connect to the same site from within a browser (Chrome, IE) or from windows explorer, I'm able to find the site and login just fine. I tired posting a picture, but I was prevented from doing so as I'm a newbie. So I'm stumped now. If I could not connect from windows, then I can assume it is a FTP server issue. This happens to me only from the Java program. And I also know that my code works as I have used in numerous occasions before. Here is the code I use: public void uploadFile(String fileName) throws Exception { FileTransferClient ftpClient = null; try { ftpClient = new FileTransferClient(); ftpClient.setRemoteHost(gv.ftpHost); ftpClient.setRemotePort(21); ftpClient.setUserName(gv.ftpUserName); ftpClient.setPassword(gv.ftpPassword); ftpClient.getAdvancedFTPSettings().setConnectMode(FTPConnectMode.PASV); ftpClient.connect(); ftpClient.uploadFile(gv.irp + fileName, fileName, WriteMode.OVERWRITE); } catch (Exception e) { throw new Exception("Error occured in uploadFile()\n" + e); } finally { if (ftpClient != null) { if (ftpClient.isConnected()) { ftpClient.disconnect(); } ftpClient = null; } } } I use the edtFTPj library. My environment is Eclipse Helios (32 bit) on Java 1.6 (32 bit) running from a Windows 7 64 bit machine. Any insight on resolving this will be greatly appreciated. Thanks for your time. java exception upload ftp edtftpj shar
This Site Careers Other all forums Forum: Ant, Maven and Other Build Tools /build.xml:372: java.net.UnknownHostException: root +ant Vas Miriyala Ranch Hand Posts: 114 I like... posted 6 years ago Hi friends i am deploying http://stackoverflow.com/questions/4227624/ftp-site-works-but-im-unable-to-connect-from-java-program-i-get-java-net-unkno webapplication into tomcat using ant with eclipse environment..got the script some where and changed necessary modifications to ant script,then targets like clean,all,compile,dist,javadoc are worked fine and when i try to deploy application using https://coderanch.com/t/466630/tools/build-xml-java-net-UnknownHostException deploy taget got the error message which says ERROR /root/workspace/myapp/build.xml:372: java.net.UnknownHostException: root i did necessary changes to managet.xml file also and I am using Eclipse-Galileo,Apache Ant-1.7.1,jdk1.6.0_15,Tomcat-5.5.27. Here is build.xml
refused: connect in Java java.net.ConnectException: Connection refused: connect is one of the most common networking exceptions in Java. This error comes when you are working with client-server architecture and trying to make TCP connection from the client to the server. Though this is not as cryptic as java.lang.OutOfMemoryError: Java heap Space or java.lang.UnsupportedClassVersionError, it's still a frequent problem in distributed Java applications. java.net.ConnectException: Connection refused: connect also comes in the case of RMI (Remote Method Invocation) because RMI also uses TCP-IP protocol underneath. While writing client socket code in Java, You should always provide proper handling of this exception. In this Java tutorial, we will see why connection refused exception comes and how to solve java.net.ConnectException: Connection refused: connect Exception in Java. Normally, Java books like Head First Java won't teach you much about how to deal with such exception, it's simply too much to ask for a beginner's book. java.net.ConnectException: Connection refused Error - Possible reasons Connection refused is a clear case of a client trying to connect on a TCP port but not able to succeed. Here are some of the possible reason why java.net.ConnectException: Connection refused: connect comes: 1) Client and Server, either or both of them are not in the network. Yes it's possible that they are not connected to LAN or internet or any other network, in that case, Java will throw "java.net.ConnectException: Connection refused" exception on client side. 2) Server is not running The second most common reason is the server is down and not running. In that case, also you will get java.net.ConnectException: Connection refused error. What I don't like is that the message it gives, no matter what is the reason it prints the same error. By the way, you can use following networking commands e.g. ping to check if the server is running and listening on the port. 3) The server is running but not listening on the port, a client is trying to connect. This is another common cause of "java.net.ConnectException: Connection refused", wher