java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible:module

Question

This is my first cucumber project and i followed a tutorial when setting everything up. It all seems to be the same but for some reason i get this:

java.lang.ExceptionInInitializerError. Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible: module java.base does not "opens java.util" to unnamed module @74ad1f1f

Any idea how to solve this error ?

Below i have posted everything that comes out in my console as well as my pom file in case there is an issue with my dependencies eventhough the guy from the tutorial's pom file is identical.

This is everything that comes out in my Console.

[31mFailed scenarios:[0m
[31muni/login/Login.feature:3 [0m# Scenario: Enter the system.
1 Scenarios ([31m1 failed[0m)
5 Steps ([31m1 failed[0m, [36m4 skipped[0m)
0m0.185s

java.lang.ExceptionInInitializerError
    at cucumber.deps.com.thoughtworks.xstream.XStream.setupConverters(XStream.java:820)
    at cucumber.deps.com.thoughtworks.xstream.XStream.<init>(XStream.java:574)
    at cucumber.deps.com.thoughtworks.xstream.XStream.<init>(XStream.java:530)
    at cucumber.runtime.xstream.LocalizedXStreams$LocalizedXStream.<init>(LocalizedXStreams.java:50)
    at cucumber.runtime.xstream.LocalizedXStreams.newXStream(LocalizedXStreams.java:37)
    at cucumber.runtime.xstream.LocalizedXStreams.get(LocalizedXStreams.java:29)
    at cucumber.runtime.StepDefinitionMatch.runStep(StepDefinitionMatch.java:37)
    at cucumber.runtime.Runtime.runStep(Runtime.java:300)
    at cucumber.runtime.model.StepContainer.runStep(StepContainer.java:44)
    at cucumber.runtime.model.StepContainer.runSteps(StepContainer.java:39)
    at cucumber.runtime.model.CucumberScenario.run(CucumberScenario.java:44)
    at cucumber.runtime.junit.ExecutionUnitRunner.run(ExecutionUnitRunner.java:102)
    at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:63)
    at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:18)
    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    at cucumber.runtime.junit.FeatureRunner.run(FeatureRunner.java:70)
    at cucumber.api.junit.Cucumber.runChild(Cucumber.java:95)
    at cucumber.api.junit.Cucumber.runChild(Cucumber.java:38)
    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    at cucumber.api.junit.Cucumber.run(Cucumber.java:100)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:93)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:40)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:529)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:756)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:452)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
    at ✽.Given Потребителят отваря екрана за вход в системата(uni/login/Login.feature:4)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible: module java.base does not "opens java.util" to unnamed module @74ad1f1f
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
    at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:177)
    at java.base/java.lang.reflect.Field.setAccessible(Field.java:171)
    at cucumber.deps.com.thoughtworks.xstream.core.util.Fields.locate(Fields.java:39)
    at cucumber.deps.com.thoughtworks.xstream.converters.collections.TreeMapConverter.<clinit>(TreeMapConverter.java:50)
    at cucumber.deps.com.thoughtworks.xstream.XStream.setupConverters(XStream.java:820)
    at cucumber.deps.com.thoughtworks.xstream.XStream.<init>(XStream.java:574)
    at cucumber.deps.com.thoughtworks.xstream.XStream.<init>(XStream.java:530)
    at cucumber.runtime.xstream.LocalizedXStreams$LocalizedXStream.<init>(LocalizedXStreams.java:50)
    at cucumber.runtime.xstream.LocalizedXStreams.newXStream(LocalizedXStreams.java:37)
    at cucumber.runtime.xstream.LocalizedXStreams.get(LocalizedXStreams.java:29)
    at cucumber.runtime.StepDefinitionMatch.runStep(StepDefinitionMatch.java:37)
    at cucumber.runtime.Runtime.runStep(Runtime.java:300)
    at cucumber.runtime.model.StepContainer.runStep(StepContainer.java:44)
    at cucumber.runtime.model.StepContainer.runSteps(StepContainer.java:39)
    at cucumber.runtime.model.CucumberScenario.run(CucumberScenario.java:44)
    at cucumber.runtime.junit.ExecutionUnitRunner.run(ExecutionUnitRunner.java:102)
    at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:63)
    at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:18)
    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    at cucumber.runtime.junit.FeatureRunner.run(FeatureRunner.java:70)
    at cucumber.api.junit.Cucumber.runChild(Cucumber.java:95)
    at cucumber.api.junit.Cucumber.runChild(Cucumber.java:38)
    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    at cucumber.api.junit.Cucumber.run(Cucumber.java:100)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:93)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:40)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:529)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:756)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:452)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)

And this is my pom.xml

<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>
  <groupId>uni.ais</groupId>
  <artifactId>first-cucumber-project</artifactId>
  <version>1.1.0-SNAPSHOT</version>
  <name>first-cucumber-project-gr</name>
  <properties>
    <maven.compiler.target>1.8</maven.compiler.target>
    <maven.compiler.source>1.8</maven.compiler.source>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <dependencies>
    <dependency>
        <groupId>info.cukes</groupId>
        <artifactId>cucumber-java</artifactId>
        <version>1.2.5</version>
    </dependency>
    <dependency>
        <groupId>info.cukes</groupId>
        <artifactId>cucumber-junit</artifactId>
        <version>1.2.5</version>
    </dependency>
  </dependencies>
</project>

Seems like an version incompatibility between the cucumber version and the Java version you are running. It would be helpful if you provided us with both versions. — akortex, Jan 18 '22 at 13:56
JDK is 17.0.1 / JRE is 1.8.0 and cucumber is 1.0.0.202107150747 which i think is the latest version since i installed it from the eclipse marketplace recently. — Ortero, Jan 18 '22 at 15:43
This could be useful: https://stackoverflow.com/questions/70412805/what-does-this-error-mean-java-lang-reflect-inaccessibleobjectexception-unable — Prasannjeet Singh, Mar 13 '22 at 11:28

score 16 · Answer 1 · answered Dec 07 '22 at 10:03

16

It need to add some instructions to the jvm options.
I added it on idea2022, it's my steps.
Path: Run—>EditConfigurations…—>Modify options—>JAVA Add VM options—>VM options
Options: --add-opens java.base/java.util=ALL-UNNAMED
By the way, it has other options:

--add-opens java.base/java.lang=ALL-UNNAMED
--add-opens java.base/java.nio=ALL-UNNAMED
--add-opens java.base/sun.nio.ch=ALL-UNNAMED

Hope it can help you to reslove the problem

answered Dec 07 '22 at 10:03

GhostXu

161
1
2

1

I am missing the part where you explain why one would do this. – Martijn Jan Jaap de Bruin Feb 18 '23 at 14:38
@MartijnJanJaapdeBruin from the exception msg: _java.lang.ExceptionInInitializerError. Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible: **module java.base does not "opens java.util" to unnamed module @74ad1f1f**_ The message says java.base needs to opens **java.util**. So you need the JVM arg: `--add-opens java.base/java.util=ALL-UNNAMED` This will reveal another package that needs another --add-opens entry. But the key is read the msg and add an appropriate --add-opens JVM arg. – ptha Feb 23 '23 at 10:39
is there any other way to make it work without passing these arguments while using java 17? – manjosh Aug 22 '23 at 09:30

score 11 · Accepted Answer · answered Jan 19 '22 at 19:22

11

I solved my problem. Turns out the JRE that eclipse had automatically downloaded and was using wasn't compatible with this version of cucumber. I manually changed the path to a jre 1.8 that i had in my ProgramFilex(x86)/Java folder and now everything works fine.

answered Jan 19 '22 at 19:22

Ortero

243
2
3
12

can you tell us how to change the path? – Andres Camilo Sierra Hormiga Mar 04 '22 at 12:40
2

Better fix the core of the problem. Downgrading the Java version is not a permanent solution. – Thomas S. Apr 08 '22 at 11:23
Sorry i just now saw the question. I don't remember exactly what i did but i think if you go in the menus in Window > Preferences, then go to Java > Installed JREs you can add the path to your jre and the one i am using that worked with that version of cucumber is jre1.8.0. Also i know that using the older version of cucumber isn't a good idea but we had an assignment in uni that required us to use that specific version. – Ortero Apr 08 '22 at 19:55

score 4 · Answer 3 · answered Dec 16 '22 at 13:53

Adding to what @GhostXu wrote, if you are using Maven you can add an <argLine> to your surefile config in your pom.xml. Something like

<plugin>
 <groupId>org.apache.maven.plugins</groupId>
 <artifactId>maven-surefire-plugin</artifactId>
 <configuration>
    <argLine>--add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED</argLine>
  </configuration>
</plugin>

java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible:module

3 Answers3

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