[rules-users] class loading issue with websphere 6.1
Steven Williams
stevenw at objectconsulting.com.au
Tue Jan 30 18:48:20 EST 2007
Hi Vishal,
It was a while ago but I think the main problems were NullPointerExceptions
on compilation errors. We also wanted to use Java 5 syntax. I recall seeing
something from Michael or Mark suggesting Janino was not as good as Eclipse
so maybe search the list as well.
cheers
Steve
On 1/29/07, Vishal Joshi <vishaljoshi18 at yahoo.com> wrote:
>
>
> Thanks Steve,
>
> What kind of problem have you seen (or you anticipate) with JANINO?
>
> cheers,
> Vishal
>
> Steven Williams-3 wrote:
> >
> > Hi Vishal,
> >
> > We found the JANINO compiler to be less than ideal (plus we wanted to
> use
> > Java 5 syntax which only JDT supports).
> >
> > I think WebSphere has gone to 6.1.0.5 just recently.
> >
> > cheers
> > Steve
> >
> > On 1/22/07, Vishal Joshi <vishaljoshi18 at yahoo.com> wrote:
> >>
> >>
> >> Thanks Steve,
> >> I tried PARENT_LAST option, but that did not help. I will consider
> >> upgrading
> >> to 6.1.0.3.
> >> in the meanwhile i have the solution to this, by using JANINO instead
> of
> >> ECLIPSE.
> >>
> >> cheers,
> >> Vishal
> >>
> >> Steven Williams-3 wrote:
> >> >
> >> > Hi Vishal,
> >> >
> >> > We had similar problems which we resolved by upgrading to WebSphere
> >> > 6.1.0.3.
> >> > This version uses the same 3.2 jars as jboss rules. An alternative
> >> > solution
> >> > to this is to make sure that you are using the PARENT_LAST
> classloading
> >> > policy for your application and making sure the required jars are in
> >> your
> >> > ear (depending on how far along you are in development I would
> suggest
> >> > making this change anyway as it ensures the application jars are used
> >> in
> >> > preference to the server's). I'll put something up on the wiki for
> >> > troubleshooting with WebSphere.
> >> >
> >> > cheers
> >> > Steve
> >> >
> >> > On 1/19/07, Vishal Joshi <vishaljoshi18 at yahoo.com> wrote:
> >> >>
> >> >>
> >> >> This is resolved now.
> >> >> For benefit of others, i added the system variable in websphere
> >> console
> >> >> drools.compiler=JANINO
> >> >> This at runtime uses janino compiler api instead of using eclipse
> >> >> compiler,
> >> >> which seems to have conflict with the websphere app server's
> internal
> >> >> eclipse API.
> >> >>
> >> >>
> >> >>
> >> >> Vishal Joshi wrote:
> >> >> >
> >> >> > or alternatively can we configure jboss rules to use janino
> compiler
> >> >> > instead of eclipse compiler?
> >> >> >
> >> >> >
> >> >> > Vishal Joshi wrote:
> >> >> >>
> >> >> >> Just to re-iterate
> >> >> >> commons-jci-core-1.0-406301.jar has this class CompilationResult
> >> (with
> >> >> >> different packaging) which does NOT have getProblems() method.
> >> >> >> But I have another jar core-3.2.0.666.jar in my application,
> which
> >> has
> >> >> >> org.eclipse.jdt.internal.compiler.CompilationResult class with
> >> >> >> getProblems() method as expected.
> >> >> >> so this class with the required method is definitely there in the
> >> >> >> classpath.
> >> >> >>
> >> >> >> is there any other jar that is missing? or anything else?
> >> >> >>
> >> >> >>
> >> >> >> Vishal Joshi wrote:
> >> >> >>>
> >> >> >>> It is working fine with websphere 6.0.2.3 and the same
> >> application's
> >> >> >>> rule engine module does not work with websphere 6.1.
> >> >> >>>
> >> >> >>> My application has all these JCI jars bundled:
> >> >> >>> commons-jci-core-1.0-406301.jar
> >> >> >>> commons-jci-eclipse-3.2.0.666.jar
> >> >> >>> commons-jci-janino-2.4.3.jar
> >> >> >>>
> >> >> >>> anything that is missing?
> >> >> >>>
> >> >> >>>
> >> >> >>>
> >> >> >>> Mark Proctor wrote:
> >> >> >>>>
> >> >> >>>> Have you included all the JCI jars and the correct versions?
> >> >> >>>>
> >> >> >>>> Mark
> >> >> >>>> Vishal Joshi wrote:
> >> >> >>>>> posting it again after successfule subscription.
> >> >> >>>>> I have deployed my application on websphere 6.1, which
> contains
> >> >> Rule
> >> >> >>>>> engine
> >> >> >>>>> as one of the module using JBoss Rule 3.0.1. When i am trying
> to
> >> >> >>>>> invoke
> >> >> >>>>> drools api from my class
> >> >> >>>>> ====================================
> >> >> >>>>> final PackageBuilder builder = new PackageBuilder();
> >> >> >>>>> builder.addPackageFromDrl(new StringReader(drl));
> >> >> >>>>> ====================================
> >> >> >>>>>
> >> >> >>>>> it throws this exception:
> >> >> >>>>>
> >> >> >>>>> java.lang.NoSuchMethodError:
> >> >> >>>>> org/eclipse/jdt/internal/compiler/CompilationResult
> >> >> >>>>>
> >> .getProblems()[Lorg/eclipse/jdt/core/compiler/CategorizedProblem;
> >> >> >>>>> at
> >> >> >>>>>
> >> org.apache.commons.jci.compilers.EclipseJavaCompiler$2.acceptResult
> >> >> (E
> >> >> >>>>> clipseJavaCompiler.java:237)
> >> >> >>>>> at
> >> >> >>>>> org.eclipse.jdt.internal.compiler.Compiler.compile(
> Compiler.java
> >> >> :335)
> >> >> >>>>>
> >> >> >>>>> at
> >> >> >>>>> org.apache.commons.jci.compilers.EclipseJavaCompiler.compile
> >> >> (EclipseJ
> >> >> >>>>> avaCompiler.java:268)
> >> >> >>>>> at org.drools.compiler.PackageBuilder.compile(Unknown
> >> >> Source)
> >> >> >>>>> at
> >> org.drools.compiler.PackageBuilder.compileRule(Unknown
> >> >> >>>>> Source)
> >> >> >>>>> at org.drools.compiler.PackageBuilder.addRule(Unknown
> >> >> Source)
> >> >> >>>>> at org.drools.compiler.PackageBuilder.addPackage
> (Unknown
> >> >> >>>>> Source)
> >> >> >>>>> at
> >> >> >>>>> org.drools.compiler.PackageBuilder.addPackageFromDrl(Unknown
> >> >> >>>>> Source)
> >> >> >>>>>
> >> >> >>>>>
> >> >> >>>>> I have checked that class
> >> >> >>>>> org.eclipse.jdt.internal.compiler.CompilationResult is
> available
> >> >> with
> >> >> >>>>> my
> >> >> >>>>> application war in core-3.2.0.666.jar (which is part of drools
> >> >> >>>>> distributable) and it has getProblems() method also.
> >> >> >>>>>
> >> >> >>>>> any help will be greatly appreciated.
> >> >> >>>>>
> >> >> >>>>
> >> >> >>>> _______________________________________________
> >> >> >>>> rules-users mailing list
> >> >> >>>> rules-users at lists.jboss.org
> >> >> >>>> https://lists.jboss.org/mailman/listinfo/rules-users
> >> >> >>>>
> >> >> >>>>
> >> >> >>>
> >> >> >>>
> >> >> >>
> >> >> >>
> >> >> >
> >> >> >
> >> >>
> >> >> --
> >> >> View this message in context:
> >> >>
> >>
> http://www.nabble.com/class-loading-issue-with-websphere-6.1-tf3027390.html#a8430930
> >> >> Sent from the drools - user mailing list archive at Nabble.com.
> >> >>
> >> >> _______________________________________________
> >> >> rules-users mailing list
> >> >> rules-users at lists.jboss.org
> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > Steven Williams
> >> >
> >> > Supervising Consultant
> >> >
> >> > Object Consulting
> >> > Office: 8615 4500 Mob: 0439 898 668 Fax: 8615 4501
> >> > stevenw at objectconsulting.com.au
> >> > www.objectconsulting.com.au
> >> >
> >> > consulting | development | training | support
> >> > our experience makes the difference
> >> >
> >> > _______________________________________________
> >> > rules-users mailing list
> >> > rules-users at lists.jboss.org
> >> > https://lists.jboss.org/mailman/listinfo/rules-users
> >> >
> >> >
> >>
> >> --
> >> View this message in context:
> >>
> http://www.nabble.com/class-loading-issue-with-websphere-6.1-tf3027390.html#a8483889
> >> Sent from the drools - user mailing list archive at Nabble.com.
> >>
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >
> >
> >
> > --
> > Steven Williams
> >
> > Supervising Consultant
> >
> > Object Consulting
> > Office: 8615 4500 Mob: 0439 898 668 Fax: 8615 4501
> > stevenw at objectconsulting.com.au
> > www.objectconsulting.com.au
> >
> > consulting | development | training | support
> > our experience makes the difference
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/class-loading-issue-with-websphere-6.1-tf3027390.html#a8685187
> Sent from the drools - user mailing list archive at Nabble.com.
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
--
Steven Williams
Supervising Consultant
Object Consulting
Office: 8615 4500 Mob: 0439 898 668 Fax: 8615 4501
stevenw at objectconsulting.com.au
www.objectconsulting.com.au
consulting | development | training | support
our experience makes the difference
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