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https://issues.apache.org/jira/browse/NIFI-4926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16397339#comment-16397339
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Marcio Sugar commented on NIFI-4926:
------------------------------------
To easily reproduce the bug, besides setting the connection pooling service,
table name, and maximum value column, also set:
* Fetch Size = 1
* Max Rows per Flow File = 2
* Maximum Number of Fragments = 1
Make sure the table has at least 1 row in it.
> QueryDatabaseTable throws SqlException after reading from DB2 table
> -------------------------------------------------------------------
>
> Key: NIFI-4926
> URL: https://issues.apache.org/jira/browse/NIFI-4926
> Project: Apache NiFi
> Issue Type: Bug
> Components: Extensions
> Affects Versions: 1.5.0
> Environment: ubuntu 16.04
> nifi 1.5.0
> db2 v10.5.0.7
> JDBC driver db2jcc4-10.5.0.6
> Reporter: Marcio Sugar
> Priority: Major
>
> I'm trying to replicate a table from one database to another using NiFi. My
> flow is just a QueryDatabaseTable connected to a PutDatabaseRecord. The
> former fails with this SQLException after reading the whole table:
> {code:java}
> 2018-03-02 15:20:44,688 INFO [NiFi Web Server-2017]
> o.a.n.c.s.StandardProcessScheduler Starting
> QueryDatabaseTable[id=e83d9370-0161-1000-d7d6-702ae791aaf1]
> 2018-03-02 15:20:44,692 INFO [StandardProcessScheduler Thread-2]
> o.a.n.c.s.TimerDrivenSchedulingAgent Scheduled
> QueryDatabaseTable[id=e83d9370-0161-1000-d7d6-702ae791aaf1] to run with 1
> threads
> 2018-03-02 15:20:44,692 DEBUG [Timer-Driven Process Thread-2]
> o.a.n.p.standard.QueryDatabaseTable
> QueryDatabaseTable[id=e83d9370-0161-1000-d7d6-702ae791aaf1] Returning CLUSTER
> State: StandardStateMap[version=54, values={}]
> 2018-03-02 15:20:44,693 DEBUG [Timer-Driven Process Thread-2]
> o.a.n.p.standard.QueryDatabaseTable
> QueryDatabaseTable[id=e83d9370-0161-1000-d7d6-702ae791aaf1] Executing query
> SELECT * FROM FXSCHEMA.USER
> 2018-03-02 15:20:45,159 INFO [Flow Service Tasks Thread-1]
> o.a.nifi.controller.StandardFlowService Saved flow controller
> org.apache.nifi.controller.FlowController@77b729c4 // Another save pending =
> false
> 2018-03-02 15:21:41,577 INFO [Timer-Driven Process Thread-2]
> o.a.n.p.standard.QueryDatabaseTable
> QueryDatabaseTable[id=e83d9370-0161-1000-d7d6-702ae791aaf1]
> StandardFlowFileRecord[uuid=fc5e66c0-14ef-4ed5-8d84-7c4d582000b7,claim=StandardContentClaim
> [resourceClaim=StandardResourceClaim[id=1520022044698-4, container=default,
> section=4], offset=0,
> length=222061615],offset=0,name=264583001281149,size=222061615] contains
> 652026 Avro records; transferring to 'success'
> 2018-03-02 15:21:41,578 ERROR [Timer-Driven Process Thread-2]
> o.a.n.p.standard.QueryDatabaseTable
> QueryDatabaseTable[id=e83d9370-0161-1000-d7d6-702ae791aaf1] Unable to execute
> SQL select query SELECT * FROM FXSCHEMA.USER 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:291)
> at
> org.apache.nifi.controller.repository.StandardProcessSession.write(StandardProcessSession.java:2571)
> at
> org.apache.nifi.processors.standard.QueryDatabaseTable.onTrigger(QueryDatabaseTable.java:285)
> at
> org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1122)
> at
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:147)
> at
> org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
> at
> org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:128)
> at java.util.concurrent.Executors$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$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: com.ibm.db2.jcc.am.SqlException: [jcc][t4][10120][10898][4.19.26]
> Invalid operation: result set is closed. ERRORCODE=-4470, SQLSTATE=null
> at com.ibm.db2.jcc.am.kd.a(Unknown Source)
> at com.ibm.db2.jcc.am.kd.a(Unknown Source)
> at com.ibm.db2.jcc.am.kd.a(Unknown Source)
> at com.ibm.db2.jcc.am.ResultSet.checkForClosedResultSet(Unknown Source)
> at com.ibm.db2.jcc.am.ResultSet.getMetaDataX(Unknown Source)
> at com.ibm.db2.jcc.am.ResultSet.getMetaData(Unknown Source)
> at
> org.apache.commons.dbcp.DelegatingResultSet.getMetaData(DelegatingResultSet.java:322)
> at
> org.apache.commons.dbcp.DelegatingResultSet.getMetaData(DelegatingResultSet.java:322)
> at
> org.apache.nifi.processors.standard.util.JdbcCommon.createSchema(JdbcCommon.java:452)
> at
> org.apache.nifi.processors.standard.util.JdbcCommon.convertToAvroStream(JdbcCommon.java:256)
> at
> org.apache.nifi.processors.standard.QueryDatabaseTable.lambda$onTrigger$0(QueryDatabaseTable.java:289)
> ... 13 common frames omitted
> {code}
> According to [DB2's
> documentation|http://www-01.ibm.com/support/docview.wss?uid=swg21461670],
> this particular exception could be avoided by adding this setting (semicolon
> included) to the JDBC connection URL:
> {code:java}
> allowNextOnExhaustedResultSet=1;{code}
> But it didn't make a difference in my case.
> I also tried to set the 'Fetch Size' and 'Max Rows Per Flow File' to
> different values, to no avail.
> Setting the 'Additional WHERE clause' to get just a small number of rows
> didn't help either.
> It looks like the connection is been prematurely closed by the processor.
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