2.5.0-RC1: ClassCastException: org.quartz.plugins.xml.XMLSchedulingDataProcessorPlugin cannot be cast to org.quartz.jobs.FileScanListener

[cstsw]

I'm trying to port our quartz jobs to a recent version of Wildfly (31 under Java 17) and get the following error for a job declared in an XML-file:

ERROR [org.quartz.core.JobRunShell] Job JobSchedulingDataLoaderPlugin.JobSchedulingDataLoaderPlugin_jobInitializer_hfdb-metax-schedule_xml threw an unhandled Exception: : java.lang.ClassCastException: class org.quartz.plugins.xml.XMLSchedulingDataProcessorPlugin cannot be cast to class org.quartz.jobs.FileScanListener (org.quartz.plugins.xml.XMLSchedulingDataProcessorPlugin and org.quartz.jobs.FileScanListener are in unnamed module of loader 'org.quartz@2.5.0-rc1' @1b4c3620) at org.quartz@2.5.0-rc1//org.quartz.plugins.xml.FileScanJob.execute(FileScanJob.java:101) at org.quartz@2.5.0-rc1//org.quartz.core.JobRunShell.run(JobRunShell.java:202) at org.quartz@2.5.0-rc1//org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)

Some background:

• In the past we have defined a custom Wildfly Module consisting of quartz-all-2.1.6.jar (along with dependency declarations to other Wildfly modules like javax.transaction.api etc.)
• For Wildfly 31 I created an updated Wildfly Module consisting of quartz-2.5.0-rc1.jar and quartz-jobs-2.5.0-rc1.jar. This is the first version containing Jakarta EE adaptions as of commit 217d1724e0fae72263b090219197818c775ad71e. (Recent Wildfly releases no longer feature the javax-namespaces of Java EE.)
• I obtained the JAR-Files from Maven Central.

My questions are:

• Have the JAR-Files quartz-2.5.0-rc1.jar and quartz-jobs-2.5.0-rc1.jar been produced by the same build and are they intended to be used together?
• Is the approach we took feasible from your perspective or do you see any obstacles?
• Is there a chance to release a fully Jakarta EE compatible, final version of quartz? (The aforementioned commit speaks only of an "initial set of changes to move to jakarta namespace".)

[cstsw]

A quick follow-up: the issue regarding the FileScanListener was (probably unintendedly) introduced in commit 6f37e295eeb474a2beb4d48e893014903599e703: since that commit the class XMLSchedulingDataProcessorPlugin implements org.quartz.plugins.xml.FileScanListener whereas formerly it implemented org.quartz.jobs.FileScanListener. Hence, the ClassCastException as printed in the stacktrace in the post above occurs when using quartz jobs defined in XML-files.

[j-blandford]

Same issue here. Our logs have been destroyed by this!

[jhouserizer]

I'm working on a fix for this.

[j-blandford]

Thank you @jhouserizer !