OptaPlanner AWT DataFlavor build time init error

[geoand]

Optaplanner native integration tests are failing to build native binary due to #20239

One of the issues is:

 javax.activation.ActivationDataFlavor the class was requested to be initialized at run time (). org.drools.compiler.kproject.models.KieModuleMarshaller caused initialization of this class with the following trace:
	at javax.activation.ActivationDataFlavor.<clinit>(ActivationDataFlavor.java)
	at java.lang.Class.forName0(Unknown Source)
	at java.lang.Class.forName(Class.java:398)
	at com.thoughtworks.xstream.core.JVM.loadClassForName(JVM.java:328)
	at com.thoughtworks.xstream.core.JVM.loadClassForName(JVM.java:307)
	at com.thoughtworks.xstream.XStream.setupAliases(XStream.java:801)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:540)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:470)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:444)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:397)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:371)
	at org.kie.soup.xstream.XStreamUtils.createNonTrustingXStream(XStreamUtils.java:198)
	at org.drools.compiler.kproject.models.KieModuleMarshaller.<init>(KieModuleMarshaller.java:47)
	at org.drools.compiler.kproject.models.KieModuleMarshaller.<clinit>(KieModuleMarshaller.java:45)

java.awt.datatransfer.DataFlavor the class was requested to be initialized at run time (Quarkus run time init for AWT). org.drools.compiler.kproject.models.KieModuleMarshaller caused initialization of this class with the following trace:
	at java.awt.datatransfer.DataFlavor.<clinit>(DataFlavor.java:115)
	at java.lang.Class.forName0(Unknown Source)
	at java.lang.Class.forName(Class.java:398)
	at com.thoughtworks.xstream.core.JVM.loadClassForName(JVM.java:328)
	at com.thoughtworks.xstream.core.JVM.loadClassForName(JVM.java:307)
	at com.thoughtworks.xstream.XStream.setupAliases(XStream.java:801)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:540)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:470)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:444)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:397)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:371)
	at org.kie.soup.xstream.XStreamUtils.createNonTrustingXStream(XStreamUtils.java:198)
	at org.drools.compiler.kproject.models.KieModuleMarshaller.<init>(KieModuleMarshaller.java:47)
	at org.drools.compiler.kproject.models.KieModuleMarshaller.<clinit>(KieModuleMarshaller.java:45)

The AWT extension pushes any java.awt classes to be run time initialized. In this case, some static initalization in org.drools.compiler.kproject.models.KieModuleMarshaller, which currently happens at build time, leads, through xstream dependency to trying to initialize java.awt.datatransfer.DataFlavor at build time, to clashes with the AWT extension.

Since the new AWT extension was introduced the Optaplanner quickstart has been failing (see #11563 (comment)).
graalvm/mandrel#292 might also be related

[quarkus-bot]

/cc @galderz, @zakkak

[galderz]

FYI graalvm/mandrel#292 will be fixed in upcoming Mandrel 21.2.0.2 version. See graalvm/mandrel#292 (comment) for details.

I'll look into the Optaplanner issue next.

[galderz]

PR sent: https://github.com/kiegroup/optaplanner/pull/1594

[ge0ffrey]

cc @mariofusco Can we fix this upstream in Drools 8 such that this workaround can be removed? https://github.com/kiegroup/optaplanner/pull/1594

[ge0ffrey]

Thank you Galder! The fix is merged (@triceo is following up) I suspect this issue can be closed?

[galderz]

No worries Geoffrey :). Closing.