JCIFS - connection breaks

java jcifs
user2680083 picture user2680083 · Jul 23, 2014 · Viewed 19.2k times · Source

I need to connect to a UNC "directory" and to create a file in that directory. I found this entry on stackoverflow : access to file using Java with Samba JCIFS. A good thing is that it works well on my system, but when I put the program to the server I get the following exception :

Exception in thread "main" jcifs.smb.SmbException: Failed to connect: <serverName>
jcifs.util.transport.TransportException: Connection in error
jcifs.util.transport.TransportException
java.net.ConnectException: Connection timed out: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(Unknown Source)
    at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at jcifs.smb.SmbTransport.ssn139(SmbTransport.java:196)
    at jcifs.smb.SmbTransport.negotiate(SmbTransport.java:249)
    at jcifs.smb.SmbTransport.doConnect(SmbTransport.java:322)
    at jcifs.util.transport.Transport.run(Transport.java:241)
    at java.lang.Thread.run(Unknown Source)
    at jcifs.util.transport.Transport.run(Transport.java:258)
    at java.lang.Thread.run(Unknown Source)
    at jcifs.util.transport.Transport.connect(Transport.java:154)
    at jcifs.smb.SmbTransport.connect(SmbTransport.java:307)
    at jcifs.smb.SmbTree.treeConnect(SmbTree.java:156)
    at jcifs.smb.SmbFile.doConnect(SmbFile.java:911)
    at jcifs.smb.SmbFile.connect(SmbFile.java:954)
    at jcifs.smb.SmbFile.connect0(SmbFile.java:880)
    at jcifs.smb.SmbFile.open0(SmbFile.java:972)
    at jcifs.smb.SmbFile.open(SmbFile.java:1006)
    at jcifs.smb.SmbFileOutputStream.<init>(SmbFileOutputStream.java:142)
    at jcifs.smb.SmbFileOutputStream.<init>(SmbFileOutputStream.java:97)
    at jcifs.smb.SmbFileOutputStream.<init>(SmbFileOutputStream.java:67)
    at path.unc.TestUNC.main(TestUNC.java:79)
    at jcifs.smb.SmbTransport.connect(SmbTransport.java:309)
    at jcifs.smb.SmbTree.treeConnect(SmbTree.java:156)
    at jcifs.smb.SmbFile.doConnect(SmbFile.java:911)
    at jcifs.smb.SmbFile.connect(SmbFile.java:954)
    at jcifs.smb.SmbFile.connect0(SmbFile.java:880)
    at jcifs.smb.SmbFile.open0(SmbFile.java:972)
    at jcifs.smb.SmbFile.open(SmbFile.java:1006)
    at jcifs.smb.SmbFileOutputStream.<init>(SmbFileOutputStream.java:142)
    at jcifs.smb.SmbFileOutputStream.<init>(SmbFileOutputStream.java:97)
    at jcifs.smb.SmbFileOutputStream.<init>(SmbFileOutputStream.java:67)
    at path.unc.TestUNC.main(TestUNC.java:79)

I have created the following code:

    //... read user, pw and uncPath from console
    NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication("", user, pw);

    SmbFile dir = new SmbFile(uncPath, auth);

    if (dir.isDirectory()) {
        writer.println(uncPath + " is a directory");
    }

    uncPath = uncPath + "/test.txt";

    writer.println("full path = '" + uncPath + "'");

    SmbFile smbFile = new SmbFile(uncPath, auth);

    writer.println(smbFile.getPermission());

    SmbFileOutputStream uncOut = new SmbFileOutputStream(smbFile);
    PrintWriter uncPrint = new PrintWriter(uncOut);
    uncPrint.println("text from " + TestUNC.class);
    uncPrint.flush();
    // close stream

Which creates the following output on the console:

    smb://<serverName>/myDirectory is a directory
    full path = 'smb://<serverName>/myDirectory/test.txt'

    (java.security.AllPermission <all permissions> <all actions>)

So it can access the directory and also have all permissions.

Like I said, on my local machine it works great (a Win 7 machine). The server seems not able to create the file. But can log in and check if the path is a directory, the server is a Win 2008 machine.

One perhaps interesting point on both machine the command net use I: \\<serverName>\myDirectory <pw> /user:<domain\user> works fine, and allows to create files in there.

My thought was that the response from the server takes too long and jcifs closes it, for that reason I changed the timeout values :

    System.setProperty("jcifs.smb.client.responseTimeout", "120000"); // default: 30000 millisec.
    System.setProperty("jcifs.smb.client.soTimeout", "140000"); // default: 35000 millisec.

Answer

Nayana Priyankara picture Nayana Priyankara · Apr 3, 2017

Try using IP address instead of server name. I had the same issue and got fixed using IP address

full path = 'smb://<IPaddress>/myDirectory/test.txt'

Related questions

Access to file using Java with Samba JCIFS

I have a question about accessing file with Samba JCIFS. So there is a server I want to access, let's call it server.unv.edu and the workgroup is WKGRP. There is a share in this server: \\server.unv.edu\…

Read More
connecting to shared folder in windows with java

I need to connect to a shared folder on a remote windows machine through java , where i put my domain authentication (username and password ) in the code , here is my code File file = new File("\\\\theRemoteIP\\webapps"); File[] files = file.…

Read More
How to copy file from smb share to local drive using jcifs in Java?

Could anybody help me to copy file from shared folder to local drive? My code is: import jcifs.smb.NtlmPasswordAuthentication; import jcifs.smb.SmbFile; import jcifs.smb.SmbFileInputStream; import jcifs.smb.SmbFileOutputStream;; public class smb { /** * @param args * @throws IOException */ public …

Read More