[rules-users] KieContainer#updateToVersion fails when both versions of a drl file contain an event type declaration for an existing class

[mikedev9000]

I am using the latest drools 6.1.0-SNAPSHOT. I have two jars containing
different versions of a KieModule, and they each contain a drl file with an
event type declaration for an existing class. If I try to update the
container from one version to the other, the call to
KieContainer#updateToVersion returns a Results instance that contains errors
related to the @timestamp attribute on that event declaration. Here is an
example of the error message: "[Message [id=1, level=ERROR, path=r0.drl,
line=3, column=0
   text=Error creating field accessors for timestamp field 'mytime' for type
'FooEvent']]".

The following .patch file can be used to add a unit test to the
IncrementalCompilationTest.java file that demonstrates this problem. 

test_container_update_problem.patch
<http://drools.46999.n3.nabble.com/file/n4030100/test_container_update_problem.patch>  

After applying the patch, and running this unit test, I see the following
test failure:


java.lang.AssertionError: Errors detected on updateToVersion: [Message
[id=1, level=ERROR, path=r0.drl, line=3, column=0
   text=Error creating field accessors for timestamp field 'mytime' for type
'FooEvent']]
	at org.junit.Assert.fail(Assert.java:88)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.junit.Assert.assertFalse(Assert.java:64)
	at
org.drools.compiler.integrationtests.IncrementalCompilationTest.testUpdateWithDeclarationPresent(IncrementalCompilationTest.java:95)



This error makes it nearly impossible for me to rely on and use
KieContainer#updateToVersion, because I need to allow frequent changes to be
made to drl files at run time, and I would prefer not to recreate the
KieContainer, and all of its KieBases and KieSessions on every update.

Is this a known issue? If so, are there plans to fix it before the
6.1.0.Final release?




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