[jira] [Created] (NIFI-4926) QueryDatabaseTable throws SqlException after reading entire DB2 table

["Marcio Sugar (JIRA)" <ji...@apache.org>]

Marcio Sugar created NIFI-4926:
----------------------------------

             Summary: QueryDatabaseTable throws SqlException after reading entire 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


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.

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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