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java.lang.NullPointerException: null	at org.sonar.plugins.ldap.LdapSearch.find(LdapSearch.java:126)	at org.sonar.plugins.ldap.LdapSearch.findUnique(LdapSearch.java:143)	at org.sonar.plugins.ldap.LdapUsersProvider.doGetUserDetails(LdapUsersProvider.java:77)	at org.sonar.api.security.ExternalUsersProvider.doGetUserDetails(ExternalUsersProvider.java:54)	at org.sonar.server.authentication.RealmAuthenticator.doAuthenticate(RealmAuthenticator.java:89)	at org.sonar.server.authentication.RealmAuthenticator.authenticate(RealmAuthenticator.java:83)	at org.sonar.server.authentication.CredentialsAuthenticator.authenticate(CredentialsAuthenticator.java:56)	at org.sonar.server.authentication.CredentialsAuthenticator.authenticate(CredentialsAuthenticator.java:45)	at org.sonar.server.authentication.ws.LoginAction.authenticate(LoginAction.java:91)	at org.sonar.server.authentication.ws.LoginAction.doFilter(LoginAction.java:76)	at org.sonar.server.platform.MasterServletFilter$GodFilterChain.doFilter(MasterServletFilter.java:125)	at org.sonar.server.platform.MasterServletFilter.doFilter(MasterServletFilter.java:94)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)	at org.sonar.server.user.UserSessionFilter.doFilter(UserSessionFilter.java:56)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)	at org.sonar.server.platform.RoutesFilter.doFilter(RoutesFilter.java:55)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)	at org.sonar.server.platform.ProfilingFilter.doFilter(ProfilingFilter.java:84)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Unknown Source)