[jcifs] NTLMHttpFilter fails from time to time

[Rao, Sailesh]

I tested it on my windows workstation & it does not appear like it is
creating multiple sockets to the domain controller. I still need to
check over on AIX. By the way, we keep getting this trace in the logs
every few minutes. Could this cause an issue?

[1/30/07 17:35:34:367 EST] 31cbe41a SystemErr     R
java.net.SocketException: Connection reset
[1/30/07 17:35:34:367 EST] 31cbe41a SystemErr     R 	at
java.net.SocketInputStream.read(SocketInputStream.java:195)
[1/30/07 17:35:34:367 EST] 31cbe41a SystemErr     R 	at
jcifs.util.transport.Transport.readn(Transport.java:29)
[1/30/07 17:35:34:367 EST] 31cbe41a SystemErr     R 	at
jcifs.smb.SmbTransport.peekKey(SmbTransport.java:352)
[1/30/07 17:35:34:367 EST] 31cbe41a SystemErr     R 	at
jcifs.util.transport.Transport.loop(Transport.java:100)
[1/30/07 17:35:34:367 EST] 31cbe41a SystemErr     R 	at
jcifs.util.transport.Transport.run(Transport.java:265)
[1/30/07 17:35:34:382 EST] 31cbe41a SystemErr     R 	at
java.lang.Thread.run(Thread.java:567)
 

-----Original Message-----
From: Michael B Allen [mailto:mba2000 at ioplex.com] 
Sent: Tuesday, January 30, 2007 5:10 PM
To: Rao, Sailesh
Cc: jcifs at lists.samba.org
Subject: Re: [jcifs] NTLMHttpFilter fails from time to time

On Tue, 30 Jan 2007 16:37:54 -0500
"Rao, Sailesh" <Sailesh.Rao at 53.com> wrote:

> 
> Our NTLM filter fails a few times every day with the a SocketException

> (Too Many Open Files). Usually the error goes away if the user closes 
> their browser and launches a new IE window. Any clues as to what may 
> be causing this? We recently upgraded to jcifs 1.2_12 from 1.2_7.
> The platform details are:
<snip>
> jcifs.util.transport.TransportException
> java.net.SocketException: Too many open files at 
> java.net.Socket.createImpl(Socket.java(Compiled Code)) at 
> java.net.Socket.<init>(Socket.java(Compiled Code))

At one time there was a bug that had to do with CLOSE_WAIT sockets.
Maybe there's something like that going on. JCIFS should multiplex all
requests to the domain controller which would mean there should be very
few connections to it (unless ssnLimit is set).

Try running netstat -tn and see if you have a lot of sockets open and if
so what they're open to and what their state is (e.g. ESTABLISHED or
CLOSE_WAIT?).

Something is chewing up so file descriptors you can't create new
sockets.

Something like lsof might help diagnose too but I don't know if AIX has
that.

Mike

--
Michael B Allen
PHP Active Directory SSO
http://www.ioplex.com/

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