If you have recently upgraded from HDP-2.6.1 to HDP-2.6.2, you may end up facing this issue.
I have seen this for a Kerberized Cluster and doAs=true in Hive.
You may have carried over same configurations for Zeppelin, Interpreter, Hive from 2.6.1 to 2.6.2 yet a simple query like
'show databases' may result in this error stacktrace shown below:
org.apache.zeppelin.interpreter.InterpreterException: Error in doAs
at org.apache.zeppelin.jdbc.JDBCInterpreter.getConnection(JDBCInterpreter.java:415)
at org.apache.zeppelin.jdbc.JDBCInterpreter.executeSql(JDBCInterpreter.java:633)
at org.apache.zeppelin.jdbc.JDBCInterpreter.interpret(JDBCInterpreter.java:733)
at org.apache.zeppelin.interpreter.LazyOpenInterpreter.interpret(LazyOpenInterpreter.java:101)
at org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:502)
at org.apache.zeppelin.scheduler.Job.run(Job.java:175)
at org.apache.zeppelin.scheduler.ParallelScheduler$JobRunner.run(ParallelScheduler.java:162)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.UndeclaredThrowableException
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1884)
at org.apache.zeppelin.jdbc.JDBCInterpreter.getConnection(JDBCInterpreter.java:407)
... 13 more
Caused by: java.sql.SQLException: Could not open client transport for any of the Server URI's in ZooKeeper: java.net.ConnectException: Connection refused
at org.apache.hive.jdbc.HiveConnection.openTransport(HiveConnection.java:218)
at org.apache.hive.jdbc.HiveConnection.<init>(HiveConnection.java:156)
at org.apache.hive.jdbc.HiveDriver.connect(HiveDriver.java:105)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:208)
at org.apache.commons.dbcp2.DriverManagerConnectionFactory.createConnection(DriverManagerConnectionFactory.java:79)
at org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:205)
at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:861)
at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:435)
at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:363)
at org.apache.commons.dbcp2.PoolingDriver.connect(PoolingDriver.java:129)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:270)
at org.apache.zeppelin.jdbc.JDBCInterpreter.getConnectionFromPool(JDBCInterpreter.java:362)
at org.apache.zeppelin.jdbc.JDBCInterpreter.access$000(JDBCInterpreter.java:89)
at org.apache.zeppelin.jdbc.JDBCInterpreter$1.run(JDBCInterpreter.java:410)
at org.apache.zeppelin.jdbc.JDBCInterpreter$1.run(JDBCInterpreter.java:407)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1866)
... 14 more
Caused by: org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused
at org.apache.thrift.transport.TSocket.open(TSocket.java:185)
at org.apache.thrift.transport.TSaslTransport.open(TSaslTransport.java:248)
at org.apache.thrift.transport.TSaslClientTransport.open(TSaslClientTransport.java:37)
at org.apache.hadoop.hive.thrift.client.TUGIAssumingTransport$1.run(TUGIAssumingTransport.java:52)
at org.apache.hadoop.hive.thrift.client.TUGIAssumingTransport$1.run(TUGIAssuming
Solution
1. Edit Interpreter to add the following property and value in JDBC Interpreter
Goto http://zeppelinhost:port/#/interpreter . Replace zeppelinhost and port details.
Scroll down to jdbc interpreter and click edit.
hive.proxy.user.property = hive.server2.proxy.user
2. Restart Interpreter
3. Play the notebook and issue will be resolved.
Explanation:
When Zeppelin server is running with authentication enabled, then the interpreter can utilize Hive's user proxy feature i.e. send extra parameter for creating and running a session ("hive.server2.proxy.user=": "${loggedInUser}").
This is configured by specifying the parameter as noted in Step 1 above.
