slf4j and classpath issue

[jeronimo75]

Problem Statement

please read https://github.com/cbeust/testng-eclipse/blob/master/docs/Troubleshooting.md first
When running the plugin there is the following classpath error:
java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory

I have version 7.5 of the plugin installed. This occurs with 2021.12 eclipse version, fresh install. It once worked , but
after the plugin has automatically upgraded to 7.5, it stopped working I don't know if it is related or not.

However When I uninstall and reinstall the plugins to 7.4.0, it does not change the error.
But eclipse is tricky when you try to uninstall and rollback to previous version. I needed to uninstall files manually, and then I managed to rollback to 7.1.1 and it worked.

Any relate message in "Error Log" view

"Windows -> Show View -> Others -> Error Log"
java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.testng.log4testng.Logger.lambda$getLogger$0(Logger.java:30)
at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
at org.testng.log4testng.Logger.getLogger(Logger.java:30)
at org.testng.xml.LaunchSuite.(LaunchSuite.java:25)
at org.testng.eclipse.util.SuiteGenerator.createCustomizedSuite(SuiteGenerator.java:34)
at org.testng.eclipse.ui.util.ConfigurationHelper.createLaunchSuites(ConfigurationHelper.java:604)
at org.testng.eclipse.ui.util.ConfigurationHelper.getLaunchSuites(ConfigurationHelper.java:448)
at org.testng.eclipse.launch.TestNGLaunchConfigurationDelegate.createVMRunner(TestNGLaunchConfigurationDelegate.java:315)
at org.testng.eclipse.launch.TestNGLaunchConfigurationDelegate.launchTypes(TestNGLaunchConfigurationDelegate.java:156)
at org.testng.eclipse.launch.TestNGLaunchConfigurationDelegate.launch(TestNGLaunchConfigurationDelegate.java:93)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:803)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:716)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1021)
at org.eclipse.debug.internal.ui.DebugUIPlugin$2.run(DebugUIPlugin.java:1224)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory cannot be found by org.testng_7.5.0.r202201070709
at org.eclipse.osgi.internal.loader.BundleLoader.generateException(BundleLoader.java:516)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:511)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:403)
at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
... 15 more
eclipse.buildId=4.22.0.I20211124-1800
java.version=17.0.1
java.vendor=Eclipse Adoptium
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=fr_FR
Framework arguments: -product org.eclipse.epp.package.java.product
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.java.product

Alternatively I can also have the following error on other projects, depending on the dependencies...
java.lang.NoClassDefFoundError: Could not initialize class org.testng.eclipse.util.ClassMethodsSuite
at org.testng.eclipse.util.SuiteGenerator.createCustomizedSuite(SuiteGenerator.java:34)
at org.testng.eclipse.ui.util.ConfigurationHelper.createLaunchSuites(ConfigurationHelper.java:604)
at org.testng.eclipse.ui.util.ConfigurationHelper.getLaunchSuites(ConfigurationHelper.java:448)
at org.testng.eclipse.launch.TestNGLaunchConfigurationDelegate.createVMRunner(TestNGLaunchConfigurationDelegate.java:315)
at org.testng.eclipse.launch.TestNGLaunchConfigurationDelegate.launchTypes(TestNGLaunchConfigurationDelegate.java:156)
at org.testng.eclipse.launch.TestNGLaunchConfigurationDelegate.launch(TestNGLaunchConfigurationDelegate.java:93)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:803)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:716)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1021)
at org.eclipse.debug.internal.ui.DebugUIPlugin$2.run(DebugUIPlugin.java:1224)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

The Dependency Management tool for your project

• Maven

• Gradle

• Ant

• Eclipse Buildpath (aka. Use "TestNG Library" for your project in Eclipse)

  testImplementation ('org.testng:testng:7.5') { exclude module: 'guice' }
  testImplementation group: 'com.google.inject', name: 'guice', version: '5.1.0' // force version
  testImplementation 'junit:junit:4.13'

Operating System

• Windows
• Linux
• OSX

[missedone]

Thanks for reporting the issue, it should be solved in the latest plugin version 7.8.0

[SantiBailors]

I am using the plugin v. 7.8.0 but I'm getting the same error:

[RemoteTestNG] detected TestNG version 7.8.0
Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.testng.log4testng.Logger.lambda$getLogger$0(Logger.java:30)
at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
at org.testng.log4testng.Logger.getLogger(Logger.java:30)
at org.testng.TestNG.(TestNG.java:113)
at org.testng.remote.support.RemoteTestNGFactory7_8.createRemoteTestNG(RemoteTestNGFactory7_8.java:16)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:67)
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
... 6 more

Since I don't need this logger, I used the workaround of adding (as external jar) to the build path of the project that contains these tests the slf4j-api jar (https://www.slf4j.org/download.html), so now I just get a warning that it's using a no-op logger implementation (see https://www.slf4j.org/codes.html#noProviders for actual logging).

Eclipse 2023-09 (4.29.0, Build id: 20230907-1323), Windows 10 Pro.

java.specification.version=17
java.vm.vendor=Eclipse Adoptium
sun.arch.data.model=64
java.vm.specification.version=17
java.runtime.version=17.0.7+7

[missedone]

@SantiBailors , do you see any error on the "Error Log" view

[missedone]

seems duplicate with #559

[SantiBailors]

@missedone I agree, what I am experiencing is definitely #559. No, there are no errors in the Error Log view after I get this exception. But interestingly, there are after I check for updates, and one is about TestNG update site. I am going to write what I got into #559.

[missedone]

Could you try the latest version of 7.9.0

[missedone]

closing this as 7.8.0.202308061717 and 7.9.0.202312310355 above should solve this issue

see #561 (comment)