Why does javafx-maven-plugin:jlink cause a java.nio.file.AccessDeniedException? - java

I am trying to use jlink as part of the javafx-maven-plugin plugin to create a runtime image with AdoptOpenJDK 15. For some reason I end up getting the following error during the jlink goal:
Error: java.io.UncheckedIOException: java.nio.file.AccessDeniedException: ...\target\image\bin\javaw.exe
javafx:run, however, works fine.
Note: The path to the project has been omitted from the error message.

Some antiviruses can block the creation of executable files. Check if this is the case and configure your antivirus to exclude ...\target\image\bin\javaw.exe from being checked, or to trust the jlink process to write whatever it wants.

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How to get KQueue to be available in Java in OSX?

My packages are as following:
implementation("io.netty:netty-transport-native-epoll:$nettyVersion")
implementation("io.netty:netty-transport-native-kqueue:$nettyVersion")
implementation("io.netty:netty-transport-native-epoll:$nettyVersion:linux-aarch_64")
implementation("io.netty:netty-transport-native-epoll:$nettyVersion:linux-x86_64")
implementation("io.netty:netty-transport-native-kqueue:$nettyVersion:osx-x86_64")
Gradle showing the package getting installed correctly: (where <source> is the path to our internal library storage)
Cached resource <source>/releases/io/netty/netty-transport-native-kqueue/4.1.78.Final/netty-transport-native-kqueue-4.1.78.Final-osx-x86_64.jar is up-to-date (lastModified: Fri Jun 24 17:45:28 PDT 2022).
Gradle output showing the system:
------------------------------------------------------------------------
Detecting the operating system and CPU architecture
------------------------------------------------------------------------
os.detected.name=osx
os.detected.arch=x86_64
os.detected.version=12.4
os.detected.version.major=12
os.detected.version.minor=4
os.detected.classifier=osx-x86_64
Simplest way I can reproduce is:
KQueue.isAvailable()
returns false.
If I run the following to get more information:
KQueue.unavailabilityCause().printStackTrace();
I get: (removed repeating or unnecessary stack traces)
java.lang.UnsatisfiedLinkError: could not load a native library: netty_transport_native_kqueue_x86_64
at io.netty.util.internal.NativeLibraryLoader.load(NativeLibraryLoader.java:239)
at io.netty.channel.kqueue.Native.loadNativeLibrary(Native.java:155)
...
Suppressed: java.lang.UnsatisfiedLinkError: no netty_transport_native_kqueue_x86_64 in java.library.path: /Users/kdilsiz/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
...
Am I not supposed to be able to run this code? What am I missing?
If I search online for the error, it shows outdated Netty package loading errors (only showing up in debug level logging). This is NOT my problem. The package loads correctly when I run gradle and I can see it is being cached/loaded with gradle -info --refresh-dependencies.
It was due to one of the dependencies importing netty-all. This was causing the Kqueue packages to be imported twice and with different versions.
The problem was that I did not fully read the stack trace from:
KQueue.unavailabilityCause().printStackTrace();
In the end of that stack trace, it said:
Caused by: java.lang.IllegalStateException: Multiple resources found for 'META-INF/native/libnetty_transport_native_kqueue_x86_64.jnilib' with different content:
...
After that, I was able to find where the package was coming from and fix it. Then I was able to locally run the Java Code to run domain socket and test it locally.
I used IntelliJ to run it after the fix. (VsCode had a problem even after the fix, hence wanted to mention it)

'RunTime:loadLib: libopencv_java430.so (failed) probably dependent libs missing' error while running sikuli test script in Red had 7.6

Used maven project:
My Automation sikuli script:
package Sikuli1.DesktopProject;
Error logs:
OpenJDK 64-Bit Server VM warning: You have loaded library /home/rajatesh/.Sikulix/SikulixLibs/libopencv_java430.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c ', or link it with '-z noexecstack'.
[error] RunTime:loadLib: libopencv_java430.so (failed) probably dependent libs missing:
/home/rajatesh/.Sikulix/SikulixLibs/libopencv_java430.so: /home/rajatesh/.Sikulix/SikulixLibs/libopencv_java430.so: file too short
[error] Save your work, correct the problem and restart the IDE!
[error] see: https://github.com/RaiMan/SikuliX1/wiki/macOS-Linux:-Support-Libraries-for-OpenCV-4
TERMINATING: problem with native library: libopencv_java430.so
Exception in thread "main" java.lang.ExceptionInInitializerError at org.sikuli.script.Pattern.(Pattern.java:128) at Sikuli1.DesktopProject.SikuliProject.main(SikuliProject.java:11)
Caused by: org.sikuli.script.SikuliXception: fatal: problem with native library: libopencv_java430.so at org.sikuli.script.support.RunTime.terminate(RunTime.java:1140) at org.sikuli.script.support.RunTime.libsLoad(RunTime.java:1285) at org.sikuli.script.support.RunTime.loadLibrary(RunTime.java:1434) at org.sikuli.script.Finder$Finder2.(Finder.java:538)
... 2 more
You need to install opencv Java library. Note that you are using Redhat while Sikuli 2 works out of the box with Ubuntu flavors. So you need install required libs by yourself.

TestRig / grun drops java.lang.NoClassDefFoundError when using the output directory -o option

Following this post, I am using the following steps to compile the parser/lexer from this repository:
export CLASSPATH=".:/usr/local/Cellar/antlr/&ltversion&gt/antlr-&ltversion&gt-complete.jar:$CLASSPATH"
antlr &ltgrammarName&gt.g4 -o &ltsomeFolder&gt/
javac &ltsomeFolder&gt/&ltgrammarName&gt*.java
but when I use the instructions here:
grun <someFolder>/<grammarName> tokens -tokens < <inputFile>
I get this error messages:
Exception in thread "main" java.lang.NoClassDefFoundError: IllegalName: &ltsomeFolder&gt/&ltgrammarName&gtLexer
at java.base/java.lang.ClassLoader.preDefineClass(ClassLoader.java:889)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1014)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:825)
at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:723)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:646)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:604)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at org.antlr.v4.gui.TestRig.process(TestRig.java:129)
at org.antlr.v4.gui.TestRig.main(TestRig.java:119)
I would appreciate if you could help me know what is the problem and how I can resolve it.
I don’t see where you’ve specified a package name, so now your Java classes are located in <someFolder>. Be sure to compile them in that folder.
Then you’ll need to add that folder to your classpath (probably instead of “.”)
Try adding <someFolder> into the CLASSPATH you’re exporting. Then leave it off of your grun command line.
Java will only load classes from the Classpath (it’s a security thing). When TestRig runs, it attempts to load your class by building the Java class name it would have produced for you Parser (and Java will have to find that class somewhere in the classpath).
Your could modify the grun alias to allow for you to specify a directory to search for your classes, and use the -cp option on the Java command, but that’s probably more trouble than just adding it to you classpath that you’re using for this testing.

Run JavaFX with Visual Studio Code Remote Extension

I'm already trying for a few hours to run a JavaFX application with the help of the Visual Studio Remote Development extension within a Docker Container.
I want to forward the graphic of the application with the help of X11. I already integrated the required packages for X11 in the container, set the DISPLAY environment variable and mounted the X11 socket in the container (/tmp/.X11-unix/).
Unfortunately, it won't work like that... Whenever I try to run the application, I get the following error message:
root#c0699153fc1c:/workspaces/JavaFX/src# java --module-path /usr/share/openjfx/lib/ --add-modules javafx.controls,javafx.fxml HelloWorldApplication.java
Graphics Device initialization failed for : es2, sw
Error initializing QuantumRenderer: no suitable pipeline found
java.lang.RuntimeException: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer.getInstance(QuantumRenderer.java:280)
at javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.init(QuantumToolkit.java:222)
at javafx.graphics/com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:260)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:267)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:158)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.startToolkit(LauncherImpl.java:658)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:678)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:94)
at javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:124)
... 1 more
Exception in thread "main" java.lang.RuntimeException: No toolkit found
I'm using openjdk:11 as base image for the docker container and installed the following packages inside of it:
openjfx
libx11-dev
libxext-dev
libxrender-dev
libxtst-dev
I previously already tried to run IntelliJ within a Docker container, which is working fine. The GUI gets forwarded to my Display and also JavaFX applications are working fine in there.
I would appreciate any help on this matter. Maybe I oversee something.
EDIT:
I think I found the problem. It seems like OpenJDK:11 and OpenJFX do not work correctly, even though I followed tons of tutorials...
So what I did now is that I exported the JDK, which comes with IntelliJ IDEA and mounted it into the container, which gets created of VS Code. After compiling the .java file with the mounted compiler and executing it, it worked flawlessly.
So now my only problem is, that I need a working setup within VS Code to get JavaFX applications working -> so a proper OpenJDK and OpenJFX configuration.
Finally, I was able to fix the problem. So the solution was:
I created an own Dockerfile, where I took the openjdk:12 image as base and copied the JavaFX libraries (which I got from here: https://gluonhq.com/products/javafx/) into the container. Additionally, I added all required packages for X11 (mentioned above).
In VS Code, after the container has been started, I simply had to add the libs to the "Referenced Libraries".
Afterwards, I had to adjust the launch.json and added the following vmArgs:
"vmArgs": "--module-path <Path-to-FX-Folder> --add-modules javafx.controls"
Now when I run the application, the window is going to be created and shown on my DISPLAY.

BIRT Build standalone report generator in a JAR

I have built a Java 1.8 application under Maven in Eclipse that allows me to generate BIRT reports in a programmatic way without the need for the UI. Within Eclipse everything works fine. If I compile the code into a JAR file and try to run it however I run into problems with java.lang.NoClassDefFoundErrors. Clearly I have a missing dependancy but I don't know how to resolve the problem.
The error is
java -cp target/* com.resonancex.scheduler.Scheduler
Establishing conection...
Connected
Got products to report
ProductId=1 ProductType=BREN Isin=XS1939207996 Template=BREN_MU
* birtEngine EngineConfig: org.eclipse.birt.report.engine.api.EngineConfig.emitterConfigs={html=org.eclipse.birt.report.engine.api.HTMLEmitterConfig#71bbf57e};
* Birt Engine Startring ....
Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/core/runtime/CoreException
at org.eclipse.birt.core.framework.Platform.createPlatformLauncher(Platform.java:115)
at org.eclipse.birt.core.framework.Platform.startup(Platform.java:74)
at com.resonancex.scheduler.BirtEngine.start(BirtEngine.java:33)
at com.resonancex.scheduler.BirtEngine.getBirtEngine(BirtEngine.java:47)
at com.resonancex.scheduler.BIRTReportGenerator.setReportCustom(BIRTReportGenerator.java:67)
at com.resonancex.scheduler.Scheduler.generateAllReports(Scheduler.java:68)
at com.resonancex.scheduler.Scheduler.main(Scheduler.java:79)
Caused by: java.lang.ClassNotFoundException: org.eclipse.core.runtime.CoreException
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
I added the library org.eclipse.birt.runtime_4.8.0-20180626-4.8.0 which appears to be the required BIRT runtime. Can anyone give me a few pointers as to what else I may need?
Just in case anyone else tries to do this I thought I would list the libraries I needed to install to get standalone BIRT report generation running running. The list is as follows. Obviously this list may change over time so keep that in mind:
axis-1.4.jar
batik-anim-1.7.jar
batik-awt-util-1.7.jar
batik-bridge-1.7.jar
batik-css-1.7.jar
batik-dom-1.7.jar
batik-gvt-1.7.jar
batik-i18n-1.9.jar
batik-parser-1.7.jar
batik-script-1.7.jar
batik-svg-dom-1.7.jar
batik-transcoder-1.7.jar
batik-util-1.8.jar
batik-xml-1.7.jar
hibernate-agroal-5.4.9.Final.jar
icu4j-4.8.jar
itext-2.1.7.jar
mssql-jdbc-7.4.1.jre8.jar
org.apache.batik.css-1.6.0.jar
org.eclipse.birt.runtime_4.8.0-20180626-4.8.0.jar
org.eclipse.core.runtime_3.14.0.v20180417-0825-4.8.0.jar
org.eclipse.datatools.connectivity.oda-3.5.0.201603142002.jar
org.eclipse.datatools.connectivity.oda.consumer-3.3.0.201603142002.jar
org.eclipse.emf.common-2.16.0.jar
org.eclipse.emf.ecore-2.11.1.jar
org.eclipse.emf.ecore.xmi-2.11.1.jar
org.eclipse.equinox.common_3.10.0.v20180412-1130-4.8.0.jar
org.eclipse.equinox.registry_3.8.0.v20180426-1327-4.8.0.jar
org.eclipse.osgi_3.13.0.v20180409-1500-4.8.0.jar
org.mozilla.javascript-1.7.5.v201504281450.jar
org.w3c.dom.smil_1.0.1.v200903091627-4.8.0.jar
org.w3c.dom.svg-1.1.0.jar
sac-1.3.jar
xml-apis-1.4.01.jar

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