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Unable to derive module descriptor: Provider {class X} not in module

I am getting this error message when I try to compile my new modularized Java 11 application:
Error occurred during initialization of boot layer
java.lang.module.FindException: Unable to derive module descriptor for C:\Users\inter\.m2\repository\xalan\xalan\2.7.2\xalan-2.7.2.jar
Caused by: java.lang.module.InvalidModuleDescriptorException: Provider class org.apache.bsf.BSFManager not in module
This appears to be an issue from a dependency of a dependency. I can't even find which module is pulling it in so I can update it.
I am using openjdk 11.0.2, IntelliJ 2018.3.4, Maven
Any advice how I can troubleshoot or fix this? I have found very little documentation on this issue.

Xalan
I had a look at their bug tracker following their index page and wasn't able to find this reported and not sure how actively is the library being maintained either.
General Explanation
Just to explain what has caused the issue in your code, I would share a screenshot and then try to add details around it.
So within the JAR that for version 2.7.2, there are service declarations (META-INF/services) which include org.apache.xalan.extensions.bsf.BSFManager as one of them. The service file here has to indicate the Provider thereby for itself and the class is supposed to be present on the modulepath to be resolved for reliable configuration of modules.
In this case for the module xalan(automatic module), the service listed doesn't have the provider class packaged within the dependency itself. (See the package org.apache, it doesn't further have package bsf and the class BSFManager thereby. Hence the exception as you get.
Short term hack
One of the tweaks to get that resolved would be to get update the library jar (patch it) and get rid of the service file if you're not using it. Or to add the provider copied from the corresponding artifact.
If you don't directly depend on this artifact or its parent dependencies, you can let those remain on the --classpath and get resolved as an unnamed module for your application.
Long term solve
An ideal way would be to report this to the maintainers and getting it resolved. It depends though on how actively are they maintaining it e.g. the last release for xalan was almost 5 years back, might just want to look for an actively participated alternative in my opinion.

I tried to install update for TestNG in eclipse:
"Help -> Check for updates -> deselect all and select TestNG check box. Then
install latest version i installed the version which starts with 7.2.0.
It fixed the issue for me.

Optaplanner - Error when running executable jar but works fine from eclipse

I use eclipse for my optaplanner project development and I am able to execute my code from eclipse without any problem. To make this project as an executable, I exported it as a jar file using eclipse export wizard.
Then I run my jar from terminal using the command java -jar myOptaPlanner.jar, then, I get below error
WARN given scan urls are empty. set urls in the configuration
Exception in thread "main" java.lang.IllegalStateException: The scanAnnotatedClasses
(ScanAnnotatedClassesConfig()) did not find any classes with a PlanningSolution
annotation.
Maybe you forgot to annotate a class with a PlanningSolution annotation.
Maybe you're using special classloading mechanisms (OSGi, ...) and this is a bug.
If you can confirm that, report it to our issue tracker and workaround it by
defining the classes explicitly in the solver configuration.
at org.optaplanner.core.config.domain.ScanAnnotatedClassesConfig.loadSolutionClass(ScanAnnotatedClassesConfig.java:106)
at org.optaplanner.core.config.domain.ScanAnnotatedClassesConfig.buildSolutionDescriptor(ScanAnnotatedClassesConfig.java:86)
at org.optaplanner.core.config.solver.SolverConfig.buildSolutionDescriptor(SolverConfig.java:270)
at org.optaplanner.core.config.solver.SolverConfig.buildSolver(SolverConfig.java:216)
at org.optaplanner.core.impl.solver.AbstractSolverFactory.buildSolver(AbstractSolverFactory.java:57)
at org.roster.app.WorkerRosteringApp.main(WorkerRosteringApp.java:36)
Is this really a bug or am I exporting it wrong?
Update: I tried to export jar using maven-shade-plugin and here also I am getting the same error.
Thanks

scanAnnotatedClasses doesn't seem to work in a jar file. Instead, use following workaround:
<solutionClass>path.to.your.SolutionClass</solutionClass>
<entityClass>path.to.your.EntityClassI</entityClass>
<entityClass>path.to.your.EntityClassII</entityClass>
and delete the scanAnnotatedClasses in your config file.

If you don't want to declare the solution and entity classes manually, including the packages containing the solution and entity classes also works as workaround:
<scanAnnotatedClasses>
<packageInclude>your.package.here</packageInclude>
</scanAnnotatedClasses>
Documentation about <packageInclude> can be found here

Unable to load library NLPIR.dll in JNA

I try to use a word-segmentation software, I create a new java project named JNA, and import the required files into JNA dir, then I try to run it without any code modification, and MyEclipse warns me that:
Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'E://java//JNI//JnaTest_NLPIR//NLPIR': Native library (win32-x86-64/E://java//JNI//JnaTest_NLPIR//NLPIR.dll) not found in resource path ([file:/D:/javasoft/MyEclipse_workspace/JNA/bin/, file:/D:/javasoft/MyEclipse_workspace/JNA/lib/jna-4.0.0.jar])
I tried to:
create the same dirs and move NLPIR.dll to E:/java/JNI/JnaTest_NLPIR/, it didn't work.
move NLPIR.dll directly to JNA/bin or JNA/lib, but it didn't work, too.
I think that it is caused by the position of my NLPIR.dll. But I could not figure out how to fix it.
I would be grateful for any help or suggestions.

Ensure NLPIR.dll (and all its dependent libraries) is on %PATH%, or use -Djna.library.path=... to indicate the folder it's in.

Optaplanner - The Website resource does not exist

I'm making a runnable jar for my project, and i keep getting this error when it starts generating the benchmark report:
Exception in thread "main" java.lang.IllegalStateException: The websiteResource (twitterbootstrap/css/bootstrap-responsive.css) does not exist.
at org.optaplanner.benchmark.impl.report.WebsiteResourceUtils.copyResource(WebsiteR esourceUtils.java:57)
at org.optaplanner.benchmark.impl.report.WebsiteResourceUtils.copyResourcesTo(WebsiteResourceUtils.java:33)
at org.optaplanner.benchmark.impl.report.BenchmarkReport.writeHtmlOverviewFile(BenchmarkReport.java:738)
at org.optaplanner.benchmark.impl.report.BenchmarkReport.writeReport(BenchmarkReport.java:287)
at org.optaplanner.benchmark.impl.DefaultPlannerBenchmark.benchmarkingEnded(DefaultPlannerBenchmark.java:315)
at org.optaplanner.benchmark.impl.DefaultPlannerBenchmark.benchmark(DefaultPlannerBenchmark.java:109)
Everything else works fine since i added "resources/" infront of the drools and the benchmarkConfig paths.
Since there are a few more resources just for the benchmark, i probably would need to do the same for them also.
How can i get access to the resources for the benchmarks?

Sounds like you're building from source with an IDE (Eclipse/IntelliJ/NetBeans/...) and your project isn't set up correctly to also copy *.css files as classpath resources (so it has a specific exclude for css somewhere).
With a modern IntelliJ IDEA version, opening the pom.xml file, this definitely doesn't happen. With a modern Eclipse/NetBeans version, I'd presume the same.

Grails 2.1.1 - How to develop a plugin with an AstTransformer?

I want to replace the auto injected log object, which is of type org.apache.commons.logging.Log with an object of type org.slf4j.Logger, so that I can use it properly with Logback.
Therefore I need to create a ...Transformer class (written in Java) - that's what I got from Graeme Rocher over at the "grails-user" mailing list. I'm also aware that I have to pack this ...Transformer class within a plugin and make it a *.jar archive which I can load within the lib/ folder of the plugin. But I guess I'm doing something wrong here as I have the class, along with a META-INF folder which contains the MANIFEST.MF file as well as another folder services which holds the following file org.codehaus.groovy.transform.ASTTransformation which holds just one String: the canonical name of the ...Transformer class.
Now, if I try to do a grails clean everything is fine, BUT if I try to run grails package-plugin the console comes up with a java.lang.ClassNotFoundException.
Clipping from Stacktrace:
| Packaging Grails application...
| Error Fatal error during compilation org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Could not instantiate global transform class my.package.ast.LoggingTransformation specified at jar:file:/C:/Source/MyGrailsAST/lib/replace-logging-logback-ast.jar!/META-INF/services/org.codehaus.groovy.transform.ASTTransformation because of exception java.lang.ClassNotFoundException: my.package.ast.LoggingTransformation
1 error
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Could not instantiate global transform class my.package.ast.LoggingTransformation specified at jar:file:/C:/Source/MyGrailsAST/lib/replace-logging-logback-ast.jar!/META-INF/services/org.codehaus.groovy.transform.ASTTransformation because of exception java.lang.ClassNotFoundException: my.package.ast.LoggingTransformation
Does anybody have some experience with Grails plugins which handle with AstTransformer and could give me some advice on this? Is there a good tutorial out there which I haven't seen so far?
Please let me know ;)

so, after some research, browsing and finally asking at the Grails Mailing List (see the mailing list archives at: http://grails.1312388.n4.nabble.com/Grails-user-f1312389.html I found a solution.
my goal was to create a Globals ASTTransformation, to inject a org.slf4j.Logger object instead of the usual org.apache.commons.logging.Log object into every Artefact class without annotation.
so, here are the steps:
I created Java class similar to https://github.com/grails/grails-core/blob/master/grails-logging/src/main/groovy/org/codehaus/groovy/grails/compiler/logging/LoggingTransformer.java but with my own implementation of the org.slf4j.Logger object. It is crucial that you place the Java.class under the following package: org.codehaus.groovy.grails.compiler as
Grails scans for classes that are annotated with #AstTransformer in this package. (Graeme Rocher)
and pack it into a JAR along with its MANIFEST.MF file within the META-INF/ folder. A META-INF/services directory with all its stuff is not needed as Graeme Rocher stated:
You do not need the META-INF/services stuff and I would remove it as it is probably complicating matters.
So, I guess this statement was more related to my specific problem as I only have one #AstTransformer class within my plugin, but that's just a guess. And I haven't searched for further informations on this topic. Maybe some other developer here who needs this could do some research and share his solution within this thread...
The JAR should be imported to the plugin and placed under the lib/ directory. After this you should be able to do grails clean, grails compile and grails package-plugin.
If you want to replace the log implementation, as I did, you should exclude the grails-logging and grails-plugin-log4j JARs from your designated project's classpath. This is done in the BuildConfig.groovy file:
inherits("global") {
excludes "grails-plugin-log4j", "grails-logging"
}
Now install your plugin grails install-plugin \path\to\plugin.zip and everthing should work as expected.
Hope this helps...