Guvnor 5.5 & SwitchYard 0.7 Final incompatibility error

[anikulin]

I used to work with SwithYard 0.6 Final and Guvnor 5.5 Final and everything worked ok, then I decided to move to 0.7 Final version. I saw in documentation, you wrote that RuleService is compatible both with 6 and 5.5 version of Drools. But when I try to configurate RulesService in 0.7 Final version I have such error:

23:30:23,426 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-6) MSC00001: Failed to start service jboss.deployment.unit."rhythm.jar".SwitchYardService: org.jboss.msc.service.StartException in

service jboss.deployment.unit."rhythm.jar".SwitchYardService: java.lang.RuntimeException: java.io.InvalidClassException: org.drools.rule.MVELDialectRuntimeData; local class incompatible: stream class

desc serialVersionUID = -4238880767631114244, local class serialVersionUID = 6653731109221702612

        at org.switchyard.as7.extension.services.SwitchYardService.start(SwitchYardService.java:85)

        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]

        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]

        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [rt.jar:1.7.0_10]

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [rt.jar:1.7.0_10]

        at java.lang.Thread.run(Unknown Source) [rt.jar:1.7.0_10]

Caused by: java.lang.RuntimeException: java.io.InvalidClassException: org.drools.rule.MVELDialectRuntimeData; local class incompatible: stream classdesc serialVersionUID = -4238880767631114244, local

class serialVersionUID = 6653731109221702612

In my Guvnor I have 5,5.Final version of Drools

My Rules configuration looks like this:

          <rules:implementation.rules xmlns:rules="urn:switchyard-component-rules:config:1.0">

                                        <rules:actions>

                                                  <rules:action operation="sendData" type="EXECUTE">

                                                            <rules:globals>

                                                                      <rules:mapping expression="message.content.modifiedOrderList" variable="modifiedOrderList"/>

                                                            </rules:globals>

                                                            <rules:inputs>

                                                                      <rules:mapping expression="message.content.data"/>

                                                            </rules:inputs>

                                                  </rules:action>

                                        </rules:actions>

                                                  <rules:resources>

                                                            <rules:resource location="META-INF/ChangeSet.xml" type="CHANGE_SET"/>

                                                  </rules:resources>

                   <rules:manifest>

                                        </rules:manifest>

                              </rules:implementation.rules>

Can you help me please with this error?

Thanks, Anton

[kcbabo]

It's source compatible in terms of DRL syntax.  AFAIK, compiled knowledge packages in Drools are not compatible between runtime versions and this has not changed with Drools 6.  Try rebuilding your knowledge package with Drools 6.

[magick93]

Hi Keith, as Drools 6 isnt release yet, can say if, and how, we can run SY 0.7 with Drools 5.5?

Thanks

[kcbabo]

I know they have released Alpha artifacts to the JBoss Nexus repository, but I don't know if they have put out a milestone build yet.  You could always grab a nightly from their Hudson build.  Might be best to ask on the Drools forums what the best candidate build would be for Guvnor.  I will also ask around.

[magick93]

Thanks Keith

Being that Drools 5.5 is stable, we would of course prefer to use that, for now.

Is it possible to run drools 5.5 on Switchyard 0.7?

Or should we wait for Drools 6 before upgrading?

[kcbabo]

The issue here is really with the compiled package from Guvnor.  You can use straight DRL with Drools 5 syntax from Guvnor or outside of Guvnor as well.  I'm checking with the Drools team, but the recompilation requirement has been around for quite some time, IINM.

[kcbabo]

The Drools team is working towards an alpha distribution of Drools/Guvnor 6, but there is not one in place now.  In order to use the current version of Drools support in SY with Guvnor 5.x, you will not be able to use complied packages.  Using DRL directly should work just fine.

[magick93]

Ok, so as we are using Guvnor, we should not upgrade?

I dont think there is anyway to have guvnor not compile the drl - maybe you know? Or should I ask the drools guys?

[kcbabo]

There should be a distinct DRL URL when you view the package in Guvnor.  If you are relying on binary knowledge packages, you will have to wait until a compatible version of Guvnor is available.  Hopefully, that will be soon.  The Drools guys could definitely comment more about their schedule and possible workarounds until Drools 6 enabled Guvnor is released.  Sorry for the inconvenience.

[dward]

This is completely a minor note, and unrelated to the main point of the thread, since the execution wouldn't have gotten far enough to get to the Exception...  But for people looking at the xml config snippet above, there is a (most likely copy/paste) typo.  resouces need to be contained inside a manifest, not precede it. So this: <manifest><resources></resources</manifest> not this: <resources></resources><manifest></manifest>.