JAR searched on the classpath instead of the module path in Build #156

[Paul Bakker]

Hi Alan,

I'm upgrading my "Migrating to Java 9 Modules" talk to the latest build and
run into the same problem with build 9-ea+160-jigsaw-nightly-h6207-20170316.

Hibernate-core is an automatic-module. This JAR contains the xsd file that
can't be loaded. The Hibernate code does the following:

public static URL resolveLocalSchemaUrl(String schemaResourceName) {
URL url = LocalSchemaLocator.class.getClassLoader().getResource(
schemaResourceName );
if ( url == null ) {
throw new XmlInfrastructureException( "Unable to locate schema [" +
schemaResourceName + "] via classpath" );
}
return url;
}

The classpath version of the same application does work (all code on the
classpath) still works with this build, so I suspect it's related to the
module system.

Best,

Paul


On Mon, Feb 13, 2017 at 4:52 AM, Sanne Grinovero <sanne at redhat.com> wrote:

> Hi Alexandru,
>
> please be aware that Hibernate to support Jigsaw is a work in
> progress. We had some successful builds (including test runs) some
> months ago, but we have yet to catch up on recent changes in OpenJDK.
>
> Progress for each Hibernate project can be monitored here:
>  - http://ci.hibernate.org/view/JDK9/
>
> (although we didn't upgrade to build 156 yet, investigating still some
> surprising changes)
>
> The issue you've found should probably be recorded on the Hibernate
> JIRA for project HHH:
>  - https://hibernate.atlassian.net/projects/HHH/summary
>
> Thanks,
> Sanne
>
>
> On Sun, Feb 12, 2017 at 3:33 PM, Alan Bateman <Alan.Bateman at oracle.com>
> wrote:
> > On 12/02/2017 13:29, Alexandru Jecan wrote:
> >
> >> :
> >>
> >>
> >> I compile my application, create the modular JAR and then at runtime I
> get
> >> the error:
> >>
> >> Caused by:
> >> org.hibernate.boot.jaxb.internal.stax.XmlInfrastructureException:
> Unable to
> >> locate schema [org/hibernate/jpa/orm_2_0.xsd] via classpath
> >>
> >>
> >> Could you please tell me, why does it search for the JAR on the
> classpath
> >> since I moved the JAR to automatic modules ?
> >>
> >> I have run using the –classpath and the –module-path options at the same
> >> time.
> >>
> >>
> >> After that I took an older Jigsaw build (#141 and also #142).
> >>
> >> I performed exactly the same steps and it works perfectly. The error
> from
> >> above is not displayed any more.
> >
> > There are >1500 changes in builds 143-156. Is there any way that you can
> > bisect this and track down the first build where you see a problem? The
> > exception hints of something involving JAXB and a XML schema file. You
> don't
> > say if you are using the java.xml.bind module or the standalone JAXB on
> the
> > class path. In this area, I note that there was a big refresh of JAXB
> from
> > the upstream Metro project in jdk-9+146. In addition, there was a change
> to
> > the Xalan serializer in jdk-9+150 that have brought several regressions
> and
> > bug reports, the fixes for all issues aren't in JDK 9 yet. So anything to
> > narrow this down would be good.
> >
> > -Alan
>