[Bug] JMC probe template validation error

[andrewazores]

Using the following XML probe template definition, which I generated using the JMC wizard:

<jfragent>
    <config>
        <classprefix>__JFREvent</classprefix>
        <allowtostring>false</allowtostring>
        <allowconverter>false</allowconverter>
    </config>
    <events>
        <event id="io.cryostat.quarkus.demo.event1">
            <label>Cryostat Quarkus Demo Event 1</label>
            <class>jakarta.persistence.EntityManager</class>
            <stacktrace>true</stacktrace>
            <rethrow>true</rethrow>
            <location>WRAP</location>
            <method>
                <name>find</name>
                <descriptor>(Ljava/lang/Class;Ljava/lang/Object;)Ljava/lang/Object;</descriptor>
                <parameters>
                    <parameter index="0">
                        <name>klazz</name>
                        <contenttype>Class</contenttype>
                    </parameter>
                    <parameter index="1">
                        <name>key</name>
                        <contenttype>None</contenttype>
                    </parameter>
                </parameters>
            </method>
        </event>
    </events>
</jfragent>

I get the following stack trace when attempting to upload it to Cryostat on the Events view:

Jun 20, 2023 8:28:49 PM io.cryostat.core.log.Logger error
SEVERE: cvc-enumeration-valid: Value 'CLASS' is not facet-valid with respect to enumeration '[None, Bytes, Timestamp, Millis, Nanos, Ticks, Address, OSThread, JavaThread, StackTrace, Class, Percentage]'. It must be a value from the enumeration.
Jun 20, 2023 8:28:49 PM io.cryostat.core.log.Logger warn
WARNING: HTTP 400: cvc-enumeration-valid: Value 'CLASS' is not facet-valid with respect to enumeration '[None, Bytes, Timestamp, Millis, Nanos, Ticks, Address, OSThread, JavaThread, StackTrace, Class, Percentage]'. It must be a value from the enumeration.
io.vertx.ext.web.handler.HttpException: Bad Request
Caused by: io.cryostat.net.web.http.api.v2.ApiException: cvc-enumeration-valid: Value 'CLASS' is not facet-valid with respect to enumeration '[None, Bytes, Timestamp, Millis, Nanos, Ticks, Address, OSThread, JavaThread, StackTrace, Class, Percentage]'. It must be a value from the enumeration.
	at io.cryostat.net.web.http.api.v2.ProbeTemplateUploadHandler.handle(ProbeTemplateUploadHandler.java:158)
	at io.cryostat.net.web.http.api.v2.AbstractV2RequestHandler.handle(AbstractV2RequestHandler.java:108)
	at io.cryostat.net.web.http.api.v2.AbstractV2RequestHandler.handle(AbstractV2RequestHandler.java:71)
	at io.vertx.ext.web.impl.BlockingHandlerDecorator.lambda$handle$0(BlockingHandlerDecorator.java:48)
	at io.vertx.core.impl.ContextBase.lambda$null$0(ContextBase.java:137)
	at io.vertx.core.impl.ContextInternal.dispatch(ContextInternal.java:264)
	at io.vertx.core.impl.ContextBase.lambda$executeBlocking$1(ContextBase.java:135)
	at io.vertx.core.impl.TaskQueue.run(TaskQueue.java:76)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: io.cryostat.core.agent.ProbeValidationException: cvc-enumeration-valid: Value 'CLASS' is not facet-valid with respect to enumeration '[None, Bytes, Timestamp, Millis, Nanos, Ticks, Address, OSThread, JavaThread, StackTrace, Class, Percentage]'. It must be a value from the enumeration.
	at io.cryostat.core.agent.ProbeValidator$ProbeValidatorErrorHandler.error(ProbeValidator.java:121)
	at java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:138)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:396)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:284)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(XMLSchemaValidator.java:512)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.reportSchemaError(XMLSchemaValidator.java:3600)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.elementLocallyValidType(XMLSchemaValidator.java:3437)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.processElementContent(XMLSchemaValidator.java:3347)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleEndElement(XMLSchemaValidator.java:2373)
	at java.xml/com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.endElement(XMLSchemaValidator.java:944)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1728)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2899)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:605)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
	at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:542)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)
	at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.validation.StreamValidatorHelper.validate(StreamValidatorHelper.java:178)
	at java.xml/com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorImpl.validate(ValidatorImpl.java:115)
	at io.cryostat.core.agent.ProbeValidator.validate(ProbeValidator.java:89)
	at java.xml/javax.xml.validation.Validator.validate(Validator.java:124)
	at io.cryostat.core.agent.ProbeTemplate.deserialize(ProbeTemplate.java:98)
	at io.cryostat.core.agent.LocalProbeTemplateService.getTemplate(LocalProbeTemplateService.java:114)
	at io.cryostat.net.web.http.api.v2.ProbeTemplateUploadHandler.handle(ProbeTemplateUploadHandler.java:137)
	... 11 more
Caused by: org.xml.sax.SAXParseException; lineNumber: 20; columnNumber: 57; cvc-enumeration-valid: Value 'CLASS' is not facet-valid with respect to enumeration '[None, Bytes, Timestamp, Millis, Nanos, Ticks, Address, OSThread, JavaThread, StackTrace, Class, Percentage]'. It must be a value from the enumeration.
	at java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:204)
	at java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:135)
	... 34 more
Jun 20, 2023 8:28:49 PM org.slf4j.impl.JDK14LoggerAdapter fillCallerData
WARNING: 10.89.1.31 - - [Tue, 20 Jun 2023 20:28:49 GMT] 16ms "POST /api/v2/probes/jmc-agent-probe.xml HTTP/1.1" 400 310 bytes "http://localhost:8181/events?agentTab=agent-template" "Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/113.0"
Jun 20, 2023 8:28:50 PM org.slf4j.impl.JDK14LoggerAdapter fillCallerData
INFO: 0:0:0:0:0:0:0:1%0 - - [Tue, 20 Jun 2023 20:28:50 GMT] 0ms "GET /health/liveness HTTP/1.1" 204 0 bytes "-" "curl/7.61.1"

Removing the <parameters> element fixes the immediate problem and I can continue, but without being able to capture method parameters in the event.