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java.lang.NoClassDefFoundError: org/eclipse/ui/internal/Workbench [message #1832924]

Tue, 29 September 2020 14:22

sadasd adasda

Messages: 4
Registered: September 2020

Junior Member

I migrated my Eclipse from 3.7 to 4.8 in order to support Java 8. I'm using RCP and PDE. Running my JUnit tests I suddenly get the following error:
```
java.lang.NoClassDefFoundError: org/eclipse/ui/internal/Workbench
at org.eclipse.ui.PlatformUI.isWorkbenchRunning(PlatformUI.java:114)
at com.gandu.console.ConsoleDisplayMgr.hasGUI(ConsoleDisplayMgr.java:108)
at com.gandu.commons.FileOps.deleteFileInBackgroundWhenPossible(FileOps.java:88)
at com.gandu.scm.file.StandardFileIO.deleteDir(StandardFileIO.java:67)
at com.gandu.scm.file.StandardFileIOTest.testDeleteDir(StandardFileIOTest.java:143)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at junit.framework.TestCase.runTest(TestCase.java:176)
at junit.framework.TestCase.runBare(TestCase.java:141)
at junit.framework.TestResult$1.protect(TestResult.java:122)
at junit.framework.TestResult.runProtected(TestResult.java:142)
at junit.framework.TestResult.run(TestResult.java:125)
at junit.framework.TestCase.run(TestCase.java:129)
at junit.framework.TestSuite.runTest(TestSuite.java:252)
at junit.framework.TestSuite.run(TestSuite.java:247)
at junit.framework.TestSuite.runTest(TestSuite.java:252)
at junit.framework.TestSuite.run(TestSuite.java:247)
at junit.framework.TestSuite.runTest(TestSuite.java:252)
at junit.framework.TestSuite.run(TestSuite.java:247)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:121)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)
```

The code:
```
public void testDeleteDir() {
final File file = new File(rootPath, "file");
file.mkdir();
assertTrue(file.exists());

final IFileIO fileIO = new StandardFileIO();
fileIO.deleteDir(file.getPath());
assertFalse(file.exists());
}
```
When I click on the test that failed in the eclipse, it points me to the line `fileIO.deleteDir(file.getPath());`

The `isWorkbenchRunning` method is:
```
public static boolean isWorkbenchRunning() {
return Workbench.getInstance() != null && Workbench.getInstance().isRunning();
}
```
Why is it fails on this line and how to resolve it? How to debug it best?

The files in my eclipse plugin directory:
```
> tree -af eclipse | grep org.eclipse.ui.workbench
eclipse/plugins/org.eclipse.ui.workbench.source_3.111.0.v20180524-1156.jar
eclipse/plugins/org.eclipse.ui.workbench.texteditor.source_3.11.0.v20180419-2011.jar
eclipse/plugins/org.eclipse.ui.workbench.texteditor_3.11.0.v20180419-2011.jar
eclipse/plugins/org.eclipse.ui.workbench_3.111.0.v20180524-1156.jar
```

Also, note that I also asked this question on StackOverflow but didn't get an answer yet (Can't attach the URL due to me being a new user).

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Re: java.lang.NoClassDefFoundError: org/eclipse/ui/internal/Workbench [message #1832934 is a reply to message #1832924]

Tue, 29 September 2020 16:17

Nitin Dahyabhai

Messages: 4438
Registered: July 2009

Senior Member

Are you running them as JUnit tests, or JUnit Plug-in Tests?

_
Nitin Dahyabhai
Eclipse Web Tools Platform

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Re: java.lang.NoClassDefFoundError: org/eclipse/ui/internal/Workbench [message #1832977 is a reply to message #1832934]

Wed, 30 September 2020 09:15

sadasd adasda

Messages: 4
Registered: September 2020

Junior Member

Thanks for the reply. I running them as JUnit tests. If you need any other information, please let me know. I stuck on this issue for quite a while now.

[Updated on: Wed, 30 September 2020 09:16]

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