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java.lang.NullPointerException: 	at org.springframework.ldap.support.AbstractContextSource.setupAuthenticatedEnvironment(AbstractContextSource.java:123)	at org.springframework.ldap.support.AbstractContextSource.getAuthenticatedEnv(AbstractContextSource.java:373)	at org.springframework.ldap.support.AbstractContextSource.getReadOnlyContext(AbstractContextSource.java:104)	at org.springframework.ldap.LdapTemplate.search(LdapTemplate.java:263)	at org.springframework.ldap.LdapTemplate.search(LdapTemplate.java:231)	at org.springframework.ldap.LdapTemplate.search(LdapTemplate.java:526)	at org.springframework.ldap.LdapTemplate.search(LdapTemplate.java:510)	at org.springframework.ldap.LdapTemplate.search(LdapTemplate.java:359)	at org.springframework.ldap.LdapTemplate.search(LdapTemplate.java:380)	at org.springframework.ldap.LdapTemplate.search(LdapTemplate.java:400)	at security.Authentification2SpringLdap.getUser(Authentification2SpringLdap.java:252)	at security.Authentication2SpringLDAPTest.testFindAllUsers(Authentication2SpringLDAPTest.java:45)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at junit.framework.TestCase.runTest(TestCase.java:154)	at junit.framework.TestCase.runBare(TestCase.java:127)	at junit.framework.TestResult$1.protect(TestResult.java:106)	at junit.framework.TestResult.runProtected(TestResult.java:124)	at junit.framework.TestResult.run(TestResult.java:109)	at junit.framework.TestCase.run(TestCase.java:118)	at junit.framework.TestSuite.runTest(TestSuite.java:208)	at junit.framework.TestSuite.run(TestSuite.java:203)	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:128)	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)