[jcifs] NTLMHttpFilter fails from time to time

[Rao, Sailesh]

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:
------------------------------------------------------------------------
------------------------------------------------------------------------
----
WebSphere Platform 5.1 [ND 5.1.1.11 cf110622.05] [JDK 1.4.2.5
pj9ap32142-20060428] [BASE 5.1.1.11 cf110622.05] running with process
name SSE01_CELL\SSE01_w05\BRIT_APP_w05 and process id 647354
Host Operating System is AIX, version 5.2
Java version = J2RE 1.4.2 IBM AIX build ca142-20060421 (SR5) (JIT
enabled: jitc), Java Compiler = jitc, Java VM name = Classic VM
------------------------------------------------------------------------
---------------------------------------------------
Our web.xml looks like:

<filter>
		<filter-name>NtlmHttpFilter</filter-name>
		<display-name>NtlmHttpFilter</display-name>
		<description>NTLM Authentication filter</description>
		<filter-class>jcifs.http.NtlmHttpFilter</filter-class>
		<init-param>
	        <param-name>jcifs.http.domainController</param-name>
	        <param-value>xxx</param-value>
	    </init-param>
	    <init-param>
	        <param-name>jcifs.smb.client.domain</param-name>
	        <param-value>xxx</param-value>
	    </init-param>
	    <init-param>
	        <param-name>jcifs.netbios.wins</param-name>
	        <param-value>xxx</param-value>
	    </init-param>
	    <init-param>
	        <param-name>jcifs.util.loglevel</param-name>
	        <param-value>3</param-value>
	    </init-param>
	</filter>
------------------------------------------------------------------------
-----------------------------------------------------
Error page exception
The server cannot use the error page specified for your application to
handle the Original Exception printed below. Please see the Error Page
Exception below for a description of the problem with the specified
error page.
Original Exception: 
Error Message: Filter [NtlmHttpFilter]: filter is unavailable.
Error Code: 500
Target Servlet: null
Error Stack: 
jcifs.smb.SmbException: 
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 java.net.Socket.<init>(Socket.java(Compiled Code)) 
at jcifs.smb.SmbTransport.negotiate(SmbTransport.java:242) 
at jcifs.smb.SmbTransport.doConnect(SmbTransport.java:299) 
at jcifs.util.transport.Transport.run(Transport.java:240) 
at java.lang.Thread.run(Thread.java:570) 
at jcifs.util.transport.Transport.run(Transport.java:256) 
at java.lang.Thread.run(Thread.java:570) 
at jcifs.smb.SmbTransport.connect(SmbTransport.java(Inlined Compiled
Code)) 
at jcifs.smb.SmbSession.getChallenge(SmbSession.java(Inlined Compiled
Code)) 
at jcifs.smb.SmbSession.getChallenge(SmbSession.java(Inlined Compiled
Code)) 
at jcifs.http.NtlmHttpFilter.negotiate(NtlmHttpFilter.java(Compiled
Code)) 
at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java(Compiled
Code)) 
at
com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInst
anceWrapper.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterCh
ain.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispa
tch(WebAppRequestDispatcher.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRe
questDispatcher.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppReq
uestDispatcher.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java(C
ompiled Code)) 
at
com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInv
oker.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocati
on(CachedInvocation.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.cache.invocation.CacheableInvocationContext.invo
ke(CacheableInvocationContext.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(Servle
tRequestProcessor.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSELis
tener.java(Compiled Code)) 
at
com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection
.java(Compiled Code)) 
at
com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java(
Compiled Code)) 
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java(Compiled
Code)) 
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))


Thankyou
Sailesh
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