[jcifs] [ERR] JCIFS 1.2.11: The referenced account is currently locked out and may not be logged on to

[DG]

Getting the below error in the app. The behavior is not consistent, and 
sometimes simple Apache restart causes it to appear:

java.net.UnknownHostException: Failed to negotiate with a suitable domain 
controller for xxxxxxx
	jcifs.smb.SmbSession.getChallengeForDomain(SmbSession.java:134)
	jcifs.http.NtlmHttpFilter.negotiate(NtlmHttpFilter.java:150)
	jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:114)


JCIFS logs show the following:

Failed validate DC: XXXXXXX<1C>/172.19.12.89
jcifs.smb.SmbAuthException: The referenced account is currently locked out and 
may not be logged on to.
	at jcifs.smb.SmbTransport.checkStatus(SmbTransport.java:500)
	at jcifs.smb.SmbTransport.send(SmbTransport.java:611)
	at jcifs.smb.SmbSession.sessionSetup(SmbSession.java:277)
	at jcifs.smb.SmbSession.send(SmbSession.java:233)
	at jcifs.smb.SmbTree.treeConnect(SmbTree.java:154)
	at jcifs.smb.SmbSession.interrogate(SmbSession.java:82)
	at jcifs.smb.SmbSession.getChallengeForDomain(SmbSession.java:114)
	at jcifs.http.NtlmHttpFilter.negotiate(NtlmHttpFilter.java:150)
	at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:114)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service
(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11AprProcessor.process
(Http11AprProcessor.java:833)
	at 
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process
(Http11AprProtocol.java:639)
	at org.apache.tomcat.util.net.AprEndpoint$Worker.run
(AprEndpoint.java:1285)
	at java.lang.Thread.run(Unknown Source)


Neither account (mine or the one used to access Active Directory, configured 
for the filter in web.xml) are actually locked out.

System info:
  Apache Tomcat 5.5.17
  Windows 2003 Server Active Directory
  JCIFS 1.2.11


Any ideas/suggestions?

Thanks!
-DG