[jcifs] Issues connecting with DFS server

[M. D.]

 Hello,

Another exception in the logs that is randomly occuring after a few successful pollings on the same DFS share:

Caused by: jcifs.smb.SmbException: The network name cannot be found.
	at jcifs.smb.SmbTransport.checkStatus(SmbTransport.java:566)
	at jcifs.smb.SmbTransport.send(SmbTransport.java:667)
	at jcifs.smb.SmbSession.send(SmbSession.java:238)
	at jcifs.smb.SmbTree.treeConnect(SmbTree.java:176)
	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.queryPath(SmbFile.java:1335)
	at jcifs.smb.SmbFile.exists(SmbFile.java:1417)

I'm starting to think that these exceptions are occuring due to a high load on the system.
Although, I have configured soTimeout to be 120sec...

Best regards,
M.D



 >-------- Оригинално писмо --------
 >От:   M. D.  
 >Относно: Re: [jcifs] Issues connecting with DFS server
 >До: jcifs at lists.samba.org
 >Изпратено на: Петък, 2014, Октомври 10 14:24:40 EEST
 >
 >
 > Hello,
 >
 >I also noticed this exception regularly occuring in the logs:
 >
 >Caused by: jcifs.smb.SmbException: Transport38 timedout waiting for response to SmbComSessionSetupAndX[command=SMB_COM_SESSION_SETUP_ANDX,received=false,errorCode=0,flags=0x0018,flags2=0xC803,signSeq=0,tid=0,pid=29747,uid=0,mid=12322,wordCount=12,byteCount=107,andxCommand=0xFF,andxOffset=0,snd_buf_size=16644,maxMpxCount=10,VC_NUMBER=1,sessionKey=0,lmHash.length=0,ntHash.length=0,capabilities=-2147479468,accountName=null,primaryDomain=null,NATIVE_OS=Windows Server 2008 R2,NATIVE_LANMAN=jCIFS]
 >jcifs.util.transport.TransportException: Transport38 timedout waiting for response to SmbComSessionSetupAndX[command=SMB_COM_SESSION_SETUP_ANDX,received=false,errorCode=0,flags=0x0018,flags2=0xC803,signSeq=0,tid=0,pid=29747,uid=0,mid=12322,wordCount=12,byteCount=107,andxCommand=0xFF,andxOffset=0,snd_buf_size=16644,maxMpxCount=10,VC_NUMBER=1,sessionKey=0,lmHash.length=0,ntHash.length=0,capabilities=-2147479468,accountName=null,primaryDomain=null,NATIVE_OS=Windows Server 2008 R2,NATIVE_LANMAN=jCIFS]
 >	at jcifs.util.transport.Transport.sendrecv(Transport.java:73)
 >	at jcifs.smb.SmbTransport.send(SmbTransport.java:658)
 >	at jcifs.smb.SmbSession.sessionSetup(SmbSession.java:390)
 >	at jcifs.smb.SmbSession.send(SmbSession.java:218)
 >	at jcifs.smb.SmbTree.treeConnect(SmbTree.java:176)
 >	at jcifs.smb.SmbSession.logon(SmbSession.java:147)
 >	at jcifs.smb.SmbSession.logon(SmbSession.java:140)
 >
 >
 >The issue is occuring randomly and although most of the pollings are successful sometimes these exceptions are thrown and the polling fails.
 >
 >Any help will be appreciated!
 >
 >Best regards,
 >M.D
 >
 > >-------- Оригинално писмо --------
 > >От:   M. D.  
 > >Относно: Re: [jcifs] Issues connecting with DFS server
 > >До: jcifs at lists.samba.org
 > >Изпратено на: Петък, 2014, Октомври 10 14:07:33 EEST
 > >
 > >
 > > Hello,
 > >
 > >I was wondering if this problem was solved. I'm experiencing the same particular issue:
 > >
 > >Caused by: jcifs.smb.SmbException: Invalid operation for ????? service
 > >	at jcifs.smb.SmbTree.send(SmbTree.java:100)
 > >	at jcifs.smb.SmbFile.send(SmbFile.java:775)
 > >	at jcifs.smb.SmbFile.queryPath(SmbFile.java:1363)
 > >	at jcifs.smb.SmbFile.exists(SmbFile.java:1417)
 > >
 > >> That error:
 > >
 > >>   Invalid operation for ????? service at
 > >> jcifs.smb.SmbTree.send(SmbTree.java:100)
 > >
 > >> means that the client received an SmbComTransaction response
 > >> subCommand that JCIFS doesn't understand.
 > >
 > >> If you can provide a capture, I might be able to tell you more (do not
 > >> post packet captures to the mailing list).
 > >
 > >Captures will follow.
 > >
 > >P.S. If it is of any help - I'm querying DFS shares.
 > >
 > >Best regards,
 > >M.D
 > >
 >