Hi,<br>I would to share our experience about recent versions of Drools.<br>We found out that 4.0.6 was out on last wednesday, so we decided to move up from 4.0.3 to <a href="http://4.0.6.">4.0.6.</a> We made a few tests but we counted on the fact that backward compatibility was provided. On friday, I went on Drools website and found out that version 4.0.6 was replaced by 4.0.4 whithout any more explaination, I made a research on this list to find out that you had to make a roll back. At the same time we found out a drools bug on our app :<br>
<br><font size="2">Caused by: java.lang.NullPointerException<br>
at org.drools.base.evaluators.ObjectFactory$ObjectEqualsComparator.equals(ObjectFactory.java:561)<br>
at org.drools.base.evaluators.ObjectFactory$ObjectNotEqualEvaluator.evaluate(ObjectFactory.java:158)<br>
at org.drools.rule.LiteralRestriction.isAllowed(LiteralRestriction.java:61)<br>
at org.drools.rule.LiteralConstraint.isAllowed(LiteralConstraint.java:82)<br>
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:156)<br>
at org.drools.reteoo.CompositeTupleSinkAdapter.propagateAssertTuple(CompositeTupleSinkAdapter.java:30)<br>
at org.drools.reteoo.FromNode.assertTuple(FromNode.java:90)<br>
at org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple(SingleTupleSinkAdapter.java:20)<br>
at org.drools.reteoo.JoinNode.assertTuple(JoinNode.java:107)<br>
at org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple(SingleTupleSinkAdapter.java:20)<br>
at org.drools.reteoo.JoinNode.assertObject(JoinNode.java:151)<br>
at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22)<br>
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:140)<br>
at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318)<br>
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153)<br>
at org.drools.reteoo.Rete.assertObject(Rete.java:175)<br>
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)<br>
at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71)<br>
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:909)<br>
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:881)<br>
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:682)<br><br></font>We had to deploy our app on friday, <font size="2">so we decieded to rollback to 4.0.4 to find out that we had the same error. So we decided to rollback to 4.0.3, I went to the download section of your site, and found out that previous versions where just unavailable, which is unacceptable. Obviously, I found it on our SVN, but I wasn't very happy about this.<br>
<br>Here are my conclusions :<br>- We are not going to change our version of Drools soon <br>- Please give us access to previous versions<br><br>Chris<br></font>