Login transactions taking a long time with LDAP authentication - Support and Troubleshooting

Login transactions taking a long time with LDAP authentication Issue

Login latency seen with LDAP Authentication

Problem Users notice a latency at login when they are authenticated using LDAP.

Symptoms If you review the stack trace for the login, you will see the following, indicating we are stuck executing the call getHostByAddr :

main,Default-thread-14,5,attrs=(session_id=B67EF8A2B06739C031D014FC588414CF) java.net.Inet6AddressImpl.getHostByAddr(Native Method) java.net.InetAddress$1.getHostByAddr(InetAddress.java:880) java.net.InetAddress.getHostFromNameService(InetAddress.java:559) java.net.InetAddress.getHostName(InetAddress.java:502) java.net.InetAddress.getHostName(InetAddress.java:474) com.sun.net.ssl.internal.ssl.SSLSocketImpl.getHost(SSLSocketImpl.java:1956) com.sun.net.ssl.internal.ssl.Handshaker.getHostSE(Handshaker.java:257) com.sun.net.ssl.internal.ssl.ClientHandshaker.getKickstartMessage(ClientHandshaker.java:1023) com.sun.net.ssl.internal.ssl.Handshaker.kickstart(Handshaker.java:620) com.sun.net.ssl.internal.ssl.SSLSocketImpl.kickstartHandshake(SSLSocketImpl.java:1290) com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1187) com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1215) com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1199) com.sun.jndi.ldap.Connection.createSocket(Connection.java:364) com.sun.jndi.ldap.Connection.(Connection.java:186) com.sun.jndi.ldap.LdapClient.(LdapClient.java:116) Cause LDAP authentication requires reverse DNS to be set up. If there is no externally accessible reverse DNS lookup, a delay is seen in authenticating the user. Resolution Reverse DNS lookup needs to be set up on the LDAP server and should be externally accessible.