LDAP Authentication failed due to the following..

[Simpson Kumar]

Hi,

Im trying to authenticate by providing LDAP information, and when I execute the application I get the following exception.

 
javax.naming.CommunicationException: simple bind failed: directory-test.georgetown.edu:636 [Root exception is javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target]
	at com.sun.jndi.ldap.LdapClient.authenticate(LdapClient.java:197)
	at com.sun.jndi.ldap.LdapCtx.connect(LdapCtx.java:2658)
	at com.sun.jndi.ldap.LdapCtx.<init>(LdapCtx.java:287)
	at com.sun.jndi.ldap.LdapCtxFactory.getUsingURL(LdapCtxFactory.java:175)
	at com.sun.jndi.ldap.LdapCtxFactory.getUsingURLs(LdapCtxFactory.java:193)
	at com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxInstance(LdapCtxFactory.java:136)
	at com.sun.jndi.ldap.LdapCtxFactory.getInitialContext(LdapCtxFactory.java:66)
	at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:667)
	at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:288)
	at javax.naming.InitialContext.init(InitialContext.java:223)
	at javax.naming.InitialContext.<init>(InitialContext.java:197)
	at javax.naming.directory.InitialDirContext.<init>(InitialDirContext.java:82)
	at edu.georgetown.netid.test.Simple.main(Simple.java:28)
Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1591)
	at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:187)
	at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:181)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1035)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:124)
	at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:516)
	at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:454)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:884)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1096)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:744)
	at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:258)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:317)
	at com.sun.jndi.ldap.Connection.run(Connection.java:805)
	at java.lang.Thread.run(Thread.java:619)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:285)
	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:191)
	at sun.security.validator.Validator.validate(Validator.java:218)
	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:126)
	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:209)
	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:249)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1014)
	... 12 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:174)
	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:238)
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:280)
	... 18 more   

What does it mean by "unable to find valid certification path to requested target" ? the URL which I'm giving is wrong one?