[jcifs] java.net.UnknownHostException: Failed to negotiate with a suitable domain controller for ********

[Ghouse, Sherjeel]

We implemented jCIFS NTLM authentication in production last month. There
were four outages of the Intranet site since then because of
java.net.UnknownHostException: Failed to negotiate with a suitable
domain controller for ******. The web application is stable most of the
time, except a few. The problem is happening during nights and the
production in far east  is impacted. This has become a show stopper for
us now.Here is the Environment info. 

Application Server : WebLogic 8.1 on Windows 2003 Server.

Web.xml configuration looks like

    <init-param>
      <param-name>jcifs.smb.client.domain</param-name>
      <param-value>********</param-value>
    </init-param>
    <init-param>
      <param-name>jcifs.netbios.wins</param-name>
      <param-value> I have listed 6 WINS here</param-value>
    </init-param>
    <init-param>
      <param-name>jcifs.util.loglevel</param-name>
      <param-value>1</param-value>
    </init-param>
    <init-param>
      <param-name>jcifs.smb.client.soTimeout</param-name>
      <param-value>40000</param-value>
    </init-param>
    <init-param>
      <param-name>jcifs.smb.client.responseTimeout</param-name>
      <param-value>30000</param-value>
    </init-param>
    <init-param>
      <param-name>jcifs.netbios.retryTimeout</param-name>
      <param-value>10000</param-value>
    </init-param>
    <init-param>
      <param-name>jcifs.netbios.soTimeout</param-name>
      <param-value>10000</param-value>
    </init-param>


Detailed Exception from Server logs

java.net.UnknownHostException: Failed to negotiate with a suitable
domain controller for **********
        at
jcifs.smb.SmbSession.getChallengeForDomain(SmbSession.java:126)
        at jcifs.http.NtlmHttpFilter.negotiate(NtlmHttpFilter.java:150)
        at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:114)
        at
weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:
27)
        at
weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.r
un(WebAppServletContext.java:6987)
        at
weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSu
bject.java:321)
        at
weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121
)
        at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServl
etContext.java:3892)
        at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.
java:2766)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)


Any help resolving this issue will greatly be appreciated


Sherjeel Ghouse



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