Error while exporting clob field from oracle to text field on Azure DB

Question

I have a CLOB field on an Oracle Table that stores a PDF file. When I try export this field to SQL Server Db on Azure I got this error:

2017/01/19 11:14:32 - ImpostoRenda 2.0 - ERROR (version 6.1.0.1-196, build 1 from 2016-04-07 12.08.49 by buildguy) : Unexpected batch update error committing the database connection.
2017/01/19 11:14:32 - ImpostoRenda 2.0 - ERROR (version 6.1.0.1-196, build 1 from 2016-04-07 12.08.49 by buildguy) : org.pentaho.di.core.exception.KettleDatabaseBatchException: 
2017/01/19 11:14:32 - ImpostoRenda 2.0 - Error updating batch
2017/01/19 11:14:32 - ImpostoRenda 2.0 - I/O Error: Connection reset by peer: socket write error
2017/01/19 11:14:32 - ImpostoRenda 2.0 - 
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.core.database.Database.createKettleDatabaseBatchException(Database.java:1379)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.core.database.Database.emptyAndCommit(Database.java:1368)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.trans.steps.tableoutput.TableOutput.dispose(TableOutput.java:575)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.trans.step.RunThread.run(RunThread.java:96)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at java.lang.Thread.run(Unknown Source)
2017/01/19 11:14:32 - ImpostoRenda 2.0 - Caused by: java.sql.BatchUpdateException: I/O Error: Connection reset by peer: socket write error
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at net.sourceforge.jtds.jdbc.JtdsStatement.executeBatch(JtdsStatement.java:969)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.core.database.Database.emptyAndCommit(Database.java:1355)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    ... 3 more
2017/01/19 11:14:32 - ImpostoRenda 2.0 - ERROR (version 6.1.0.1-196, build 1 from 2016-04-07 12.08.49 by buildguy) : Unexpected error rolling back the database connection.
2017/01/19 11:14:32 - ImpostoRenda 2.0 - ERROR (version 6.1.0.1-196, build 1 from 2016-04-07 12.08.49 by buildguy) : org.pentaho.di.core.exception.KettleDatabaseException: 
2017/01/19 11:14:32 - ImpostoRenda 2.0 - Error performing rollback on connection
2017/01/19 11:14:32 - ImpostoRenda 2.0 - Invalid state, the Connection object is closed.
2017/01/19 11:14:32 - ImpostoRenda 2.0 - 
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.core.database.Database.rollback(Database.java:854)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.core.database.Database.rollback(Database.java:832)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.trans.steps.tableoutput.TableOutput.dispose(TableOutput.java:610)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.trans.step.RunThread.run(RunThread.java:96)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at java.lang.Thread.run(Unknown Source)
2017/01/19 11:14:32 - ImpostoRenda 2.0 - Caused by: java.sql.SQLException: Invalid state, the Connection object is closed.
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at net.sourceforge.jtds.jdbc.ConnectionJDBC2.checkOpen(ConnectionJDBC2.java:1699)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at net.sourceforge.jtds.jdbc.ConnectionJDBC2.rollback(ConnectionJDBC2.java:2100)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    at org.pentaho.di.core.database.Database.rollback(Database.java:845)
2017/01/19 11:14:32 - ImpostoRenda 2.0 -    ... 4 more

But, if I execute the same transform to local SQL Server DB, it works fine.

How do I resolve this?

UPDATE 1

I realized that just when I put "Commit Size" bigger than 15 and set true on "Use batch update for inserts" in my TableOutput Step, the problem occurs.

Answer 1

You can try to modify TCP parameters on the client:

REG ADD HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters /v KeepAliveTime /t REG_DWORD /d 30000
REG ADD HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters /v KeepAliveInterval /t REG_DWORD /d 1000
REG ADD HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters /v TcpMaxDataRetransmission /t REG_DWORD /d 10