我正在尝试连接到impala并使用 JdbcTemplate() . 我不断得到以下错误：

java.sql.SQLException: [Simba][ImpalaJDBCDriver](500164) Error initialized or created transport for authentication: null.
at com.cloudera.impala.hivecommon.api.HiveServer2ClientFactory.createTransport(Unknown Source)
at com.cloudera.impala.hivecommon.api.HiveServer2ClientFactory.createClient(Unknown Source)
at com.cloudera.impala.hivecommon.core.HiveJDBCConnection.connect(Unknown Source)
at com.cloudera.impala.jdbc.common.BaseConnectionFactory.doConnect(Unknown Source)
at com.cloudera.impala.jdbc.common.AbstractDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at ProcedureDAOImpl.updateProcedure(ProcedureDAOImpl.java:55)
at MainRunner.procedure1(MainRunner.java:61)
at MainRunner.run(MainRunner.java:33)
at java.util.TimerThread.mainLoop(Unknown Source)
Caused by: com.cloudera.impala.support.exceptions.GeneralException: [Simba][ImpalaJDBCDriver](500164) Error initialized or created transport for authentication: null.
... 11 more
``` `ApplicationContext` 此连接的bean定义如下：