Java – JCIFS – connection breaks

javajcifs

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.

Best Solution

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'
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