I am new to NIFI, and getting following error while I am trying to access Teradata database(production environment) using querydatabasetable processor from Nifi. I have tried telnet command to teradata port 1025 from command line and its connecting. 2017-12-07 17:00:11,753 ERROR [StandardProcessScheduler Thread-4] o.a.n.p.standard.QueryDatabaseTable QueryDatabaseTable[id=2f70c1e5-0160-1000-0000-0000077bf1a3] QueryDatabaseTable[id=2f70c1e5-0160-1000-0000-0000077bf1a3] failed to invoke @OnScheduled method due to java.lang.RuntimeException: Failed while executing one of processor's OnScheduled task.; processor will not be scheduled to run for 30 seconds: java.lang.RuntimeException: Failed while executing one of processor's OnScheduled task. 2017-12-07 17:00:11,761 ERROR [StandardProcessScheduler Thread-8] org.apache.nifi.engine.FlowEngine A flow controller task execution stopped abnormally java.util.concurrent.ExecutionException: java.lang.reflect.InvocationTargetException at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[na:1.8.0_77] at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[na:1.8.0_77] at org.apache.nifi.engine.FlowEngine.afterExecute(FlowEngine.java:100) ~[na:na] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1150) [na:1.8.0_77] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_77] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_77] Caused by: java.lang.reflect.InvocationTargetException: null at sun.reflect.GeneratedMethodAccessor558.invoke(Unknown Source) ~[na:na] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_77] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_77] at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:137) ~[na:na] at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:125) ~[na:na] at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotations(ReflectionUtils.java:70) ~[na:na] at org.apache.nifi.util.ReflectionUtils.invokeMethodsWithAnnotation(ReflectionUtils.java:47) ~[na:na] at org.apache.nifi.controller.StandardProcessorNode$1$1.call(StandardProcessorNode.java:1244) ~[na:na] at org.apache.nifi.controller.StandardProcessorNode$1$1.call(StandardProcessorNode.java:1240) ~[na:na] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_77] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) ~[na:1.8.0_77] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) ~[na:1.8.0_77] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_77] ... 2 common frames omitted Caused by: org.apache.nifi.processor.exception.ProcessException: Unable to communicate with database in order to determine column types at org.apache.nifi.processors.standard.AbstractDatabaseFetchProcessor.setup(AbstractDatabaseFetchProcessor.java:189) ~[na:na] at org.apache.nifi.processors.standard.QueryDatabaseTable.setup(QueryDatabaseTable.java:164) ~[na:na] ... 15 common frames omitted Caused by: java.sql.SQLException: [Teradata Database] [TeraJDBC 16.00.00.23] [Error 3807] [SQLState 42S02] Object 'DIM_PROD' does not exist. at com.teradata.jdbc.jdbc_4.util.ErrorFactory.makeDatabaseSQLException(ErrorFactory.java:309) ~[terajdbc4.jar:16.00.00.23] at com.teradata.jdbc.jdbc_4.statemachine.ReceiveInitSubState.action(ReceiveInitSubState.java:103) ~[terajdbc4.jar:16.00.00.23] at com.teradata.jdbc.jdbc_4.statemachine.StatementReceiveState.subStateMachine(StatementReceiveState.java:311) ~[terajdbc4.jar:16.00.00.23] at com.teradata.jdbc.jdbc_4.statemachine.StatementReceiveState.action(StatementReceiveState.java:200) ~[terajdbc4.jar:16.00.00.23] at com.teradata.jdbc.jdbc_4.statemachine.StatementController.runBody(StatementController.java:137) ~[terajdbc4.jar:16.00.00.23] at com.teradata.jdbc.jdbc_4.statemachine.StatementController.run(StatementController.java:128) ~[terajdbc4.jar:16.00.00.23] at com.teradata.jdbc.jdbc_4.TDStatement.executeStatement(TDStatement.java:389) ~[terajdbc4.jar:16.00.00.23] at com.teradata.jdbc.jdbc_4.TDStatement.executeStatement(TDStatement.java:331) ~[terajdbc4.jar:16.00.00.23] at com.teradata.jdbc.jdbc_4.TDStatement.doNonPrepExecuteQuery(TDStatement.java:319) ~[terajdbc4.jar:16.00.00.23] at com.teradata.jdbc.jdbc_4.TDStatement.executeQuery(TDStatement.java:1121) ~[terajdbc4.jar:16.00.00.23] at org.apache.commons.dbcp.DelegatingStatement.executeQuery(DelegatingStatement.java:208) ~[na:na] at org.apache.commons.dbcp.DelegatingStatement.executeQuery(DelegatingStatement.java:208) ~[na:na] at org.apache.nifi.processors.standard.AbstractDatabaseFetchProcessor.setup(AbstractDatabaseFetchProcessor.java:173) ~[na:na] ... 16 common frames omitted ... View more