NPE with LDAP in 1.1M4

[shivshan]

Hi 
I was using 1.1M3 successfully with AD Authentication. However, once i have
upgraded to 1.1M4, i get an NPE. The LDAP config in xwiki.cfg is identical
in both versions. 
Regards 
Shiva 
------------------------------------------------------------------------------------------------------ 
java.lang.NullPointerException 
        at
com.xpn.xwiki.user.impl.LDAP.LDAPAuthServiceImpl.authenticate(LDAPAuthServiceImpl.java:51) 
        at
com.xpn.xwiki.user.impl.xwiki.MyFormAuthenticator.authenticate(MyFormAuthenticator.java:195) 
        at
com.xpn.xwiki.user.impl.xwiki.MyFormAuthenticator.processLogin(MyFormAuthenticator.java:95) 
        at
com.xpn.xwiki.user.impl.xwiki.XWikiAuthServiceImpl.checkAuth(XWikiAuthServiceImpl.java:211) 
        at com.xpn.xwiki.XWiki.checkAuth(XWiki.java:3000) 
        at
com.xpn.xwiki.user.impl.xwiki.XWikiRightServiceImpl.checkAccess(XWikiRightServiceImpl.java:112) 
        at com.xpn.xwiki.XWiki.checkAccess(XWiki.java:3008) 
        at com.xpn.xwiki.XWiki.prepareDocuments(XWiki.java:3881) 
        at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:132) 
        at
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) 
        at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) 
        at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) 
        at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) 
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) 
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) 
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) 
        at
com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:117) 
        at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) 
        at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) 
        at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210) 
        at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) 
        at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
        at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) 
        at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) 
        at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) 
        at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870) 
        at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) 
        at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) 
        at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) 
        at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685) 
        at java.lang.Thread.run(Unknown Source) 

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