I am able to connect finally.    I had to authenticate using kerberos so initially I was authenticating like this :   Sample () { Configuration conf = new Configuration(); conf.set("hadoop.security.authentication", "Kerberos"); UserGroupInformation.setConfiguration(conf); UserGroupInformation.loginUserFromKeytab(user, keytabPath); ugi = UserGroupInformation.getLoginUser(); } after this URL of this type :  jdbc:impala://myhost.example.com:21050/;principal=impala/myhost.example.com@H2.EXAMPLE.COM;SSL=1;sslTrustStore=trustStorePath;trsutStorePassword=xyz; Creating datasource and get connection. This did not work and was giving above mentioned exception.   Later Modification : Using AuthMech = 1 in URL and setting KrbHostFQDN,  KrbServiceName,  KrbAuthType in URL.   Not executing Sample() after this and just setting these properties :    java.security.krb5.conf = Your krb5.conf path java.security.auth.login.config = login.ini where login.ini is like this    Client { com.sun.security.auth.module.Krb5LoginModule required useKeyTab=true keyTab="PathToTheKeyTab" principal="cloudera@CLOUDERA" doNotPrompt=true; };   Hopefully this may help to debug other guys struggling like me 🙂   ... View more