[jcifs] NtlmHttpFilter

[Philipp Kirchner]

Hi Everyone!
I'm using the NtlmHttpFilter to authenticate Users accessing my webapp 
via Tomcat, from time to time i get the following Exception:

jcifs.smb.SmbException: Connection timed out: connect
    at jcifs.smb.SmbTransport.send(SmbTransport.java:727)
    at jcifs.smb.SmbTransport.negotiate(SmbTransport.java:955)
    at jcifs.smb.SmbSession.getChallenge(SmbSession.java:42)
    at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:111)
    at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
    at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
    at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
    at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
    at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
    at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
    at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
    at 
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
    at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
    at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
    at 
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
    at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
    at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
    at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
    at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
    at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
    at 
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
    at 
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
    at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
    at 
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
    at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
    at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
    at 
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
    at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
    at java.lang.Thread.run(Thread.java:534)

Normally it works, but 2-3 times a day no authentication is possible, 
and this Exception appears. What can i do about it?

Greetings
Philipp Kirchner