Hello. Im having issues trying to connect to HBase using Phoenix and a JDBC connection to Phoenix. I'm planning on using Phoenix to send and receive data to the HBase database using spring boot to implement an API to interface with our HBase database. In order to do this i need to create a connection to the Phoenix server from my java project. I made a sample project to test making a connection to the Phoenix server and query for some data. The HBase database is secured using kerberos which meant that the location of the keytabs and the kerberos principle for HBase had to be supplied. I was successfully able to make a connection and retrieve data while running the project on the cluster, but whilst trying to run the project outside of the server, i was not successful. Ranger is used to manage different authentication methods for our cluster, and the machine that i am trying to run the project on unsuccessfully is included in rangers user list using active-directory. The user is also part of the HBase group for ranger also. Im very new to Ranger, kerberos and Phoenix so it could be a very simple mistake that i am making. But my project is still throwing an exception for the user credentials not being found for the user. Bellow is the connection string i was using as well as the stack trace of the errors that are being displayed. Any help would be greatly appreciated. Thanks in advance. jdbc:phoenix:[Zookeeper server address]:2181:[hbase znode]:[Kerberos Principle]:/etc/security/keytabs/hbase.headless.keytab java.sql.SQLException: ERROR 103 (08004): Unable to establish connection. java.sql.SQLException: ERROR 103 (08004): Unable to establish connection. at org.apache.phoenix.exception.SQLExceptionCode$Factory$1.newException( SQLExceptionCode.java:489) at org.apache.phoenix.exception.SQLExceptionInfo.buildException(SQLExcep tionInfo.java:150) at org.apache.phoenix.jdbc.PhoenixEmbeddedDriver$ConnectionInfo.normaliz e(PhoenixEmbeddedDriver.java:396) at org.apache.phoenix.jdbc.PhoenixDriver.getConnectionQueryServices(Phoe nixDriver.java:238) at org.apache.phoenix.jdbc.PhoenixEmbeddedDriver.createConnection(Phoeni xEmbeddedDriver.java:150) at org.apache.phoenix.jdbc.PhoenixDriver.connect(PhoenixDriver.java:221) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at PhoenixConnectionTest.main(PhoenixConnectionTest.java:21) Caused by: java.io.IOException: Login failure for hbase-bil-hdp-app-01.prometric .qc2@HADOOP.PROMETRIC.QC2 from keytab /etc/security/keytabs/hbase.headless.keyta b: javax.security.auth.login.LoginException: Unable to obtain password from user at org.apache.hadoop.security.UserGroupInformation.loginUserFromKeytab(U serGroupInformation.java:962) at org.apache.hadoop.security.SecurityUtil.login(SecurityUtil.java:246) at org.apache.hadoop.hbase.security.User$SecureHadoopUser.login(User.jav a:420) at org.apache.hadoop.hbase.security.User.login(User.java:258) at org.apache.phoenix.jdbc.PhoenixEmbeddedDriver$ConnectionInfo.normaliz e(PhoenixEmbeddedDriver.java:387) ... 6 more Caused by: javax.security.auth.login.LoginException: Unable to obtain password f rom user at com.sun.security.auth.module.Krb5LoginModule.promptForPass(Unknown So urce) at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Un known Source) at com.sun.security.auth.module.Krb5LoginModule.login(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at javax.security.auth.login.LoginContext.invoke(Unknown Source) at javax.security.auth.login.LoginContext.access$000(Unknown Source) at javax.security.auth.login.LoginContext$4.run(Unknown Source) at javax.security.auth.login.LoginContext$4.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.login.LoginContext.invokePriv(Unknown Source) at javax.security.auth.login.LoginContext.login(Unknown Source) at org.apache.hadoop.security.UserGroupInformation.loginUserFromKeytab(U serGroupInformation.java:953) ... 10 more ... View more