How to fix : Exception in thread "main" java. lang. NoClassDefFoundError: io/ RestAssured

Ishan Dev Shukl August 12, 2021

Exception in thread "main" java.lang.NoClassDefFoundError: io/restassured/RestAssured

we get above error while working with API automation using Rest Assured quiet frequently in case we haven't defined the scope of the Rest-Assured dependency added in our POM.xml
 
In order to fix,

Just Change Scope : Test --> Compile for rest-assured artifact in POM.xml
  
Before:
    <!-- https://mvnrepository.com/artifact/io.rest-assured/rest-assured -->
        <dependency>
            <groupId>io.rest-assured</groupId>
            <artifactId>rest-assured</artifactId>
            <version>3.1.0</version>
            <scope>test</scope>
        </dependency>
 After:
    <!-- https://mvnrepository.com/artifact/io.rest-assured/rest-assured -->
        <dependency>
            <groupId>io.rest-assured</groupId>
            <artifactId>rest-assured</artifactId>
            <version>3.1.0</version>
            <scope>compile</scope>
        </dependency>        

 
How to fix : Exception in thread "main" java. lang. NoClassDefFoundError: io/ RestAssured

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20 Comments

  1. deepuJanuary 10, 2019 at 1:18 PM

    Thanks a lot .. It solved my problem..

    ReplyDelete
    Replies
    1. Ishan Dev ShuklFebruary 13, 2019 at 5:46 AM

      U're Welcome :)

      Delete
    2. AnonymousMay 3, 2020 at 1:19 PM

      Hi Ishan, I was facing the same issue google it with couple different queries and later on i found your post which resolved my issue. Thank you very much dude :) !!

      Delete
    3. Ishan Dev ShuklMay 3, 2020 at 2:38 PM

      Welcome Dear :)

      Delete
  2. UnknownMay 2, 2019 at 3:57 PM

    I am facing same issue but i am not using POM.Can anyone please help me in this?

    ReplyDelete
    Replies
    1. Ishan Dev ShuklSeptember 4, 2019 at 11:59 AM

      Download and downgrade Rest-Assured Jar to version 3.1.0. Rebuild the project. It should get fixed.

      Delete
    2. AnonymousApril 28, 2021 at 11:11 AM

      Hi there, I was facing the same issue as I am nit using any POM xml file in my project , hence downgrading the rest assured version worked for me too....thanks..

      But I would like to know what is ideal combination for rest and java versions? like currently I have checked my project is configured with Rest Assured version 3.3 and Java jdk is 12.0

      Delete
  3. UnknownMay 2, 2019 at 4:39 PM

    this is error which is shown

    C:\Users\Daffolap-624\workspace\WapandaParallel1>java org.testng.TestNG -log 10 C:\Users\Daffolap-624\workspace\WapandaParallel1\testng.xml
    [TestNG] RUNNING: Suite: "Test" containing "1" Tests (config: C:\Users\Daffolap-624\workspace\WapandaParallel1\testng.xml)
    [TestNG] INVOKING CONFIGURATION: "Test" - @BeforeTest API_Automation.ApiOperationsTest.StartDriver()
    [TestNG] FAILED CONFIGURATION: "Test" - @BeforeTest API_Automation.ApiOperationsTest.StartDriver() finished in 13 ms
    [TestNG] java.lang.NoClassDefFoundError: io/restassured/RestAssured
    [TestNG] at API_Automation.ApiOperationsTest.StartDriver(ApiOperationsTest.java:36)
    [TestNG] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    [TestNG] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    [TestNG] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    [TestNG] at java.lang.reflect.Method.invoke(Unknown Source)
    [TestNG] at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:108)
    [TestNG] at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:523)
    [TestNG] at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:224)
    [TestNG] at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:146)
    [TestNG] at org.testng.TestRunner.beforeRun(TestRunner.java:626)
    [TestNG] at org.testng.TestRunner.run(TestRunner.java:594)
    [TestNG] at org.testng.SuiteRunner.runTest(SuiteRunner.java:380)
    [TestNG] at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:375)
    [TestNG] at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
    [TestNG] at org.testng.SuiteRunner.run(SuiteRunner.java:289)
    [TestNG] at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    [TestNG] at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    [TestNG] at org.testng.TestNG.runSuitesSequentially(TestNG.java:1301)
    [TestNG] at org.testng.TestNG.runSuitesLocally(TestNG.java:1226)
    [TestNG] at org.testng.TestNG.runSuites(TestNG.java:1144)
    [TestNG] at org.testng.TestNG.run(TestNG.java:1115)
    [TestNG] at org.testng.TestNG.privateMain(TestNG.java:1442)
    [TestNG] at org.testng.TestNG.main(TestNG.java:1411)
    [TestNG] Caused by: java.lang.ClassNotFoundException: io.restassured.RestAssured
    [TestNG] at java.net.URLClassLoader.findClass(Unknown Source)
    [TestNG] at java.lang.ClassLoader.loadClass(Unknown Source)
    [TestNG] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    [TestNG] at java.lang.ClassLoader.loadClass(Unknown Source)

    ReplyDelete
  4. ankitJanuary 30, 2020 at 11:23 AM

    facing the sam eerror .
    please help
    java.lang.NoClassDefFoundError: io/restassured/RestAssured

    ReplyDelete
    Replies
    1. Ishan Dev ShuklFebruary 20, 2020 at 6:42 PM

      Sorry for replying late Ankit.
      Just Download and downgrade Rest-Assured Jar to version 3.1.0. Rebuild the project. It should get fixed.

      Delete
    2. Ishan Dev ShuklFebruary 20, 2020 at 6:43 PM


      Just Change Scope : Test --> Compile for rest-assured artifact in POM.xml

      Delete
  5. UnknownApril 2, 2020 at 6:08 AM

    Thanks . It works, but it has a warning message -
    WARNING: Illegal reflective access by org.codehaus.groovy.reflection.CachedClass

    Any idea how we can remove this warning

    ReplyDelete
    Replies
    1. Ishan Dev ShuklMay 3, 2020 at 2:39 PM

      Hi Warning should not cause any Issue in project build or execution.

      Delete
  6. UnknownMay 26, 2020 at 3:51 AM

    Got this error of class not found. Changed the scope from test to compile and it worked. thank you so much.
    If I get any more errors I'll post it here. Please solve them for me!

    ReplyDelete
  7. CharanJune 22, 2020 at 3:10 PM

    Hi Ishan im using a non-maven project and as you said i downgraded the rest-assured jar to 3.1.0 and rebuild the project and still see the same issue, please help

    ReplyDelete
    Replies
    1. Ishan Dev ShuklJune 23, 2020 at 8:28 PM

      Hi Charan!
      >>> Go to your .m2 directory and delete the rest-assured folder. (C:\Users\username.m2\repository\io)
      Nor try re-building the project.

      Delete
  8. Gururaja B OAugust 11, 2020 at 8:15 AM

    Hi Ishan,

    I am seeing this error while configure the eclipse with rest assured. I went back to Jar 3.1.0 but later I am seeing:

    Error occurred during initialization of boot layer
    java.lang.module.FindException: Unable to derive module descriptor for C:\Users\b\Desktop\RestAssured\rest-assured3.1.0\rest-assured-3.1.0-dist\rest-assured-3.1.0-deps\groovy-2.4.12.jar
    Caused by: java.lang.module.InvalidModuleDescriptorException: Provider class groovy not in module

    My project does not have pom.xml.

    Details:
    1. Eclipse IDE for Java Developers (includes Incubating components)
    Version: 2020-06 (4.16.0)
    2. Jdk 14.0.2

    I am new to Java or using eclipse so somewhere I am doing mistake. Any suggestion will be a great help.
    Thanks In advance.

    ReplyDelete
  9. SeeJanuary 20, 2021 at 5:15 PM

    Thanks a lot. It was really helpful.

    ReplyDelete
  10. ShwethaFebruary 9, 2021 at 2:18 PM

    I am facing same issue but i am not using POM.Can anyone please help me in this?
    below mentioned lib are used to the project

    rest-assured-4.3.3-dist
    xml-path-4.3.3-dist
    json-schema-validator-4.3.3-dist
    json-path-4.3.3-dist

    ReplyDelete