[jcifs] NT_STATUS_UNSUCCESSFUL Exception under heavy load

[Andreas Knoor]

Hi,

when using JCIFS 1.2.1 in a multithreading environment under heavy load
I get a SmbException with status code "NT_STATUS_UNSUCCESSFUL":

jcifs.smb.SmbException: A device attached to the system is not functioning.
	at jcifs.smb.SmbTransport.checkStatus(SmbTransport.java:479)
	at jcifs.smb.SmbTransport.send(SmbTransport.java:556)
	at jcifs.smb.SmbSession.send(SmbSession.java:233)
	at jcifs.smb.SmbTree.send(SmbTree.java:95)
	at jcifs.smb.SmbFile.send(SmbFile.java:688)
	at jcifs.smb.SmbFile.queryPath(SmbFile.java:1195)
	at jcifs.smb.SmbFile.exists(SmbFile.java:1249)

What could be the reason for this exception?
If the exception is OK: How should it be handled? 
Should i try to repeat the last operation?

Yours sincerely,

  Andreas