How to fix Illegal reflective access by com.mathwo​rks.util.D​eleteOnExi​tShutdownI​nitializer​?

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Rozerin
Rozerin 2023-9-29
编辑： Varun 2023-12-20
I have a RESTful API project where I use Spring Boot Maven. I'm also processing in Matlab with a jar file. I converted this project to .jar file, but when I run it with java -jar demo.jar it closes after running. However, since it was a restful API, it had to remain open so that I could access the APIs.
Java : Java 11
Matlab: R2018a
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.7.16</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo1</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
<cholSolver.path>C:\Users\user\Desktop\PDTO-Project\pdtopolys\cholSolver.jar</cholSolver.path>
<javabuilder.path>C:\Program Files\MATLAB\R2018a\toolbox\javabuilder\jar\javabuilder.jar</javabuilder.path>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
<version>2.8.5</version>
</dependency>
<dependency>
<groupId>com.googlecode.matrix-toolkits-java</groupId>
<artifactId>mtj</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>peridynamics</groupId>
<artifactId>cholSolver</artifactId>
<version>1.0</version>
<scope>system</scope>
<systemPath>${cholSolver.path}</systemPath>
</dependency>
<dependency>
<groupId>com.mathworks</groupId>
<artifactId>javabuilder</artifactId>
<version>R2018a</version>
<scope>system</scope>
<systemPath>${javabuilder.path}</systemPath>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
After running the jar file, it starts working. So far, no problem. However, in order for me to access the RESTful APIs I created, it must remain running and the process must not be terminated.
A few warning messages and closed:
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.mathworks.util.DeleteOnExitShutdownInitializer (file:/C:/Program%20Files/MATLAB/MATLAB%20Runtime/v94/java/jar/util.jar) to field java.io.DeleteOnExitHook.files
WARNING: Please consider reporting this to the maintainers of com.mathworks.util.DeleteOnExitShutdownInitializer
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
09:48:29.501 [SpringApplicationShutdownHook] DEBUG org.springframework.context.annotation.AnnotationConfigApplicationContext - Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@24269709, started on Fri Sep 29 09:46:43 EET 2023
I tried to use:
java --add-opens java.base/java.lang=ALL-UNNAMED -jar path/to/demo.jar
nothing changed.
How can i solve the problem?

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回答（1 个）

Varun
Varun 2023-12-20
编辑：Varun 2023-12-20
Hey! I think this is due to a bug in the JDK. I found out about it in the following bug report: https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8193516. JDK 11 is probably also affected even it is not listed in the bug report. It appears to be more of a JAVA issue than an MATLAB issue. Hope this helps!

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