Hive server 2 (version 0.14.0.2.2.0.0-2041) failure

Just installed Hive server 2 through Ambari. The connection from JDBC/ODBC to Hive server starts to fail after there a few live connections. Below is error message from Hive log file:
java.lang.RuntimeException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:444)
at org.apache.hive.service.cli.session.HiveSessionImpl.<init>(HiveSessionImpl.java:116)
at org.apache.hive.service.cli.session.HiveSessionImplwithUGI.<init>(HiveSessionImplwithUGI.java:47)
at org.apache.hive.service.cli.session.SessionManager.openSession(SessionManager.java:260)
at org.apache.hive.service.cli.CLIService.openSessionWithImpersonation(CLIService.java:175)
at org.apache.hive.service.cli.thrift.ThriftCLIService.getSessionHandle(ThriftCLIService.java:322)
at org.apache.hive.service.cli.thrift.ThriftCLIService.OpenSession(ThriftCLIService.java:235)
at org.apache.hive.service.cli.thrift.TCLIService$Processor$OpenSession.getResult(TCLIService.java:1253)
at org.apache.hive.service.cli.thrift.TCLIService$Processor$OpenSession.getResult(TCLIService.java:1238)
at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
at org.apache.hive.service.auth.TSetIpAddressProcessor.process(TSetIpAddressProcessor.java:56)
at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:206)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1449)
at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:63)
at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:73)
at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:2689)
at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:2708)
at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:425)
… 15 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedConstructorAccessor30.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1447)