I am going to try a reboot and see if I get a different message.
2017-05-20 10:37:53,174 ERROR [Timer-Driven Process Thread-3] o.a.n.p.standard.QueryDatabaseTable QueryDatabaseTable[id=65501581-100f-1159-01e0-ac486442f2d0] Unable to execute SQL select query SELECT * FROM TRIALS due to org.apache.nifi.processor.exception.ProcessException: Error during database query or conversion of records to Avro.: {}
org.apache.nifi.processor.exception.ProcessException: Error during database query or conversion of records to Avro.
at org.apache.nifi.processors.standard.QueryDatabaseTable.lambda$onTrigger$0(QueryDatabaseTable.java:289)
at org.apache.nifi.controller.repository.StandardProcessSession.write(StandardProcessSession.java:2377)
at org.apache.nifi.processors.standard.QueryDatabaseTable.onTrigger(QueryDatabaseTable.java:283)
at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1118)
at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:144)
at org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:132)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.sql.SQLException: ERROR 1101 (XCL01): ResultSet is closed.
at org.apache.phoenix.exception.SQLExceptionCode$Factory$1.newException(SQLExceptionCode.java:441)
at org.apache.phoenix.exception.SQLExceptionInfo.buildException(SQLExceptionInfo.java:145)
at org.apache.phoenix.jdbc.PhoenixResultSet.checkOpen(PhoenixResultSet.java:215)
at org.apache.phoenix.jdbc.PhoenixResultSet.next(PhoenixResultSet.java:772)
at org.apache.commons.dbcp.DelegatingResultSet.next(DelegatingResultSet.java:207)
at org.apache.commons.dbcp.DelegatingResultSet.next(DelegatingResultSet.java:207)
at org.apache.nifi.processors.standard.util.JdbcCommon.convertToAvroStream(JdbcCommon.java:103)
at org.apache.nifi.processors.standard.QueryDatabaseTable.lambda$onTrigger$0(QueryDatabaseTable.java:287)
... 13 common frames omitted
