SQLRecoverableException when fill big report

[hostdjango]

Hallo!
I use jasperreports-6.2.0.jar; oracle 11, tomcat 8, jdbc.

It is works for small report.

But i try fill big report (about 1200 rows) i get SQLRecoverableException.

for example: 

 java.sql.SQLRecoverableException: closed connection: next

at oracle.jdbc.driver.OracleResultSetImpl.next(OracleResultSetImpl.java:247)

at net.sf.jasperreports.engine.JRResultSetDataSource.next(JRResultSetDataSource.java:118)

 

java.sql.SQLRecoverableException: closed statement: getMetaData

!!! controller encountered error:

at oracle.jdbc.driver.OracleResultSetImpl.getMetaData(OracleResultSetImpl.java:168)

 

I try set net.sf.jasperreports.jdbc.holdability=hold and close, set fetch.size = 10000, now my properties:

net.sf.jasperreports.governor.max.pages.enabled=true

net.sf.jasperreports.governor.timeout.enabled=true

net.sf.jasperreports.jdbc.concurrency=readOnly

net.sf.jasperreports.jdbc.fetch.size=-2147483648

net.sf.jasperreports.jdbc.holdability=hold

net.sf.jasperreports.jdbc.result.set.type=forwardOnly

but I think there is a problem in another

 

Help me please.

[hostdjango]

I solved problem, when i began use DrimveManager.getConnection() instead DadaSource.getConnection().
I am suprised. Why it is?

[hostdjango]

I understood. I found in tomcat this property "removeAbandonedTimeout="60" and jasperreports did not had time work with ResultSet.