BreakNetException: Break packet was received?

Question

Hi there!
I have been dealing with this exception while performing a executeBatch() on an oracle DB table:
Exception Details
Type: BreakNetException: Break packet was received
Exception Class: oracle.net.ns.BreakNetException
Message: Break packet was received
API: Exception
Exception StackTrace
Method Class Line File Name
getNextPacket oracle.net.ns.NetInputStream 246 <unknown>
read oracle.net.ns.NetInputStream 175 <unknown>
read oracle.net.ns.NetInputStream 100 <unknown>
read oracle.net.ns.NetInputStream 85 <unknown>
readNextPacket oracle.jdbc.driver.T4CSocketInputStreamWrapper 122 <unknown>
read oracle.jdbc.driver.T4CSocketInputStreamWrapper 78 <unknown>
unmarshalUB1 oracle.jdbc.driver.T4CMAREngine 1179 <unknown>
unmarshalSB1 oracle.jdbc.driver.T4CMAREngine 1155 <unknown>
receive oracle.jdbc.driver.T4CTTIfun 279 <unknown>
doRPC oracle.jdbc.driver.T4CTTIfun 186 <unknown>
doOALL oracle.jdbc.driver.T4C8Oall 521 <unknown>
doOall8 oracle.jdbc.driver.T4CCallableStatement 202 <unknown>
executeForRows oracle.jdbc.driver.T4CCallableStatement 1005 <unknown>
executeForRowsWithTimeout oracle.jdbc.driver.OraclePreparedStatement 9870 <unknown>
executeBatch oracle.jdbc.driver.OraclePreparedStatement 10014 <unknown>
executeBatch oracle.jdbc.driver.OracleStatementWrapper 213 <unknown>
pmiExecuteBatch com.ibm.ws.rsadapter.jdbc.WSJdbcPreparedStatement 1037 <unknown>
executeBatch com.ibm.ws.rsadapter.jdbc.WSJdbcStatement 843 <unknown>
executeBatch com.xxx.commons.persistence.jdbc.XXXCallableStatement 187 <unknown>
persistCustRecommendations com.XXX.services.XXX.dao.CustomerRecommendationDAO 96 <unknown>
invoke sun.reflect.GeneratedMethodAccessor152 - <unknown>
invoke sun.reflect.DelegatingMethodAccessorImpl 37 <unknown>
invoke java.lang.reflect.Method 611 <unknown>
invokeTargetOperation org.apache.axis2.jaxws.server.dispatcher.JavaDispatcher 120 <unknown>
invoke org.apache.axis2.jaxws.server.dispatcher.JavaBeanDispatcher 118 <unknown>
invoke org.apache.axis2.jaxws.server.EndpointController 111 <unknown>
receive org.apache.axis2.jaxws.server.JAXWSMessageReceiver 161 <unknown>
receive org.apache.axis2.engine.AxisEngine 212 <unknown>
processHTTPPostRequest org.apache.axis2.transport.http.HTTPTransportUtils 172 <unknown>
doPost com.ibm.ws.websvcs.transport.http.WASAxis2Servlet 1606 <unknown>
service javax.servlet.http.HttpServlet 595 <unknown>
service javax.servlet.http.HttpServlet 668 <unknown>
service com.ibm.ws.webcontainer.servlet.ServletWrapper 1230 <unknown>
handleRequest com.ibm.ws.webcontainer.servlet.ServletWrapper 779 <unknown>
handleRequest com.ibm.ws.webcontainer.servlet.ServletWrapper 478 <unknown>
handleRequest com.ibm.ws.webcontainer.servlet.ServletWrapperImpl 178 <unknown>
This is the code that throws the exception:
boolean retVal = false;
Connection myConnection = null;
String myOracleEnv = null;
CallableStatement csCustSavedRecm = null;
try {
  int seq = 0;
  for (ProductRecommendationSummary customerRecommendation : customerRecommendationsList) {
    customerRecommendation.setDisplaySequenceNbr(++seq);
    csCustSavedRecm.setString(1, customerId);
    csCustSavedRecm.addBatch();
  csCustSavedRecm.executeBatch(); // <-- Exception thron here
  retVal = true;
} // end try
catch(BatchUpdateException batchUpdateException){ 
catch (Exception exp) {
} // end catch
finally {
} // end finally
This exception isn't always being thrown, I could say it happens in just 5% of all the requests made to this command.
I have been looking information about the exception but can't find anything.
I would really appreciate any help on this!
Thanks!
ps. I'm using ojdbc6.jar

Answer 1

Hi:
  It seem to be a network problem or Net service problem because is a low level exception related to the network packet size or timeout.
  Please take a quick look at this post:
Marcelo Ochoa's personal blog: An efficient way to do massive inserts with Oracle JDBC
specially the link to the parameter SDU http://docs.oracle.com/database/121/NETAG/glossary.htm#BGBBHCJF here an explanation http://docs.oracle.com/database/121/NETAG/intro.htm#CHDFDBAA , larger value will be better for batch processing.
Best regards, Marcelo.