Connection timed out: connect

[vittal mareddy]

Hi All,
I would like to have advice on multiple issues, code snippet java code.

void test(){
SmbFile sFile = null;
NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication(activeUserDomain, activeUserID, activePwd);
sFile = new SmbFile("smb:"+absoluteFilePath.replaceAll("\\\\", "/"), auth);

File inFile = new File(tempZipDir,zipFileName);
inFile.createNewFile();
DataOutputStream outZ = new DataOutputStream(new FileOutputStream(inFile));
InputStream inZ = sFile.getInputStream();
copyStreams(inZ,outZ);
}

private static final void copyStreams ( InputStream in, OutputStream out ) throws IOException 
    {  
     byte [  ]  buffer = new byte[1024]; 
     int len; 
  
  
     while (  ( len = in.read(buffer)) >= 0 )  {
       out.write( buffer, 0, len ) ; 
     }
  
     in.close() ; 
     out.close() ; 
    }  

1. above snippet of code setup locally, worked one day but later throws below exception, what might causing?

java.net.ConnectException: Connection timed out: connect
	at java.net.DualStackPlainSocketImpl.connect0(Native Method)
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:579)
	at java.net.Socket.connect(Socket.java:528)
	at java.net.Socket.<init>(Socket.java:425)
	at java.net.Socket.<init>(Socket.java:208)
	at jcifs.smb.SmbTransport.ssn139(SmbTransport.java:226)
	at jcifs.smb.SmbTransport.negotiate(SmbTransport.java:288)
	at jcifs.smb.SmbTransport.doConnect(SmbTransport.java:353)
	at jcifs.util.transport.Transport.run(Transport.java:240)
	at java.lang.Thread.run(Thread.java:745

)

2. Basically I am trying to trouble shoot performance issue, same code have been working for years i.e. to copy zip file(3KB to 800MB) from samba server to appserver but since recent time copy function takes long time for a give file, please advice what might cause?

[A.J. Côté]

Hello,

The network might be the cause. Also, the samba server might be the cause.

[vittal mareddy]

If we map source drive (\\xxx.xx.xx.xx\abcd95\D\NJ$) from target machine (aaaaaa.bbb.ccc), using window copy option transfer is quick 160MB takes 3 sec. Whereas this functionality we are doing from code implemented using JAVA API with SAMBA protocol (jcifs-1.3.17.jar) takes longer time. This implementation been working fine 8+ years, no change in implementation, since recently performance degraded, transfer take 40+ minutes, sometime transfer fails. Is it some would have changed on samba server/configuration?, please advise.

[A.J. Côté]

Your are still using a 1K buffer??

https://coderanch.com/t/657190/java-io/java/Copy-large-size-file-NAS

[vittal mareddy]

code was working for many years with

1K

, some kind of configuration changed on samba server, I disabled dfs property in jcifs, looks working in non production environment, yet to verify in production, will keep posted once verified. Thanks for helping.

[A.J. Côté]

vittal mareddy wrote:code was working for many years with

1K

, some kind of configuration changed on samba server, I disabled dfs property in jcifs, looks working in non production environment, yet to verify in production, will keep posted once verified. Thanks for helping.

https://wiki.samba.org/index.php/Distributed_File_System_%28DFS%29