After making a few changes to my otherwise solid framework, I got the following exception running my automated tests

possible nonthreadsafe access to session

net.sf.hibernate.AssertionFailure: possible nonthreadsafe access to session at net.sf.hibernate.impl.SessionImpl.postInsert(SessionImpl.java:2406) at net.sf.hibernate.impl.ScheduledInsertion.execute(ScheduledInsertion.java:38) at net.sf.hibernate.impl.SessionImpl.executeAll(SessionImpl.java:2438) at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2391) at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2260) at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61) at com.bluprinted.personal.account.AccountMonitor.updatePhoneManufacturerTable(AccountMonitor.java:192) at com.bluprinted.personal.test.WurflTestCase.testAddPhoneModels(WurflTestCase.java:40) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)


Hibernate 2
MySQL 4.1.10
MySQL connector/j 3.1.7


The code that fails:

Session session = contentDatabase.getCurrentSession();
trx = session.beginTransaction();
Iterator brandItr = brandList.iterator();
while(brandItr.hasNext()) {
caption = ((String)brandItr.next());
if (caption.length()>50) caption = caption.substring(0,50);
String name = caption.toUpperCase();
Object pm = session.get(PhoneManufacturer.class,name);
if (pm==null) {
buf.append(caption);
if (brandItr.hasNext()) buf.append(", ");
PhoneManufacturer manu = new PhoneManufacturer();
manu.setName(name);
manu.setCaption(caption);
session.save(manu);
}
else
session.evict(pm);
}
trx.commit();
contentDatabase.getSessionFactory().evict(PhoneManufacturer.class);


The failure happens in the commit. Is it the evict that ruins the show ?

Henrik

Apparently evict wasn't the right way to go about it.

I replaced the session.evict(pm) with the following after reading a blog on batch processing (http://blog.hibernate.org/cgi-bin/blosx ... batch.html)

++count;
if ( count % 20 == 0 ) {
//flush a batch of inserts and release memory:
session.flush();
session.clear();
}