AEM 6.4 mockito, junits not working - getting java.lang.NoClassDefFoundError | Community
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karanmahi
Level 4
Feb 6, 2019 5:45 PM UTC

AEM 6.4 mockito, junits not working - getting java.lang.NoClassDefFoundError

After 6.4 upgrade, junits giving below mentioned error (Using Mockito for junits). This used to work in AEM 6.3. We looked at the packages inside Uber-jar-6.4.3-apis.jar (inside maven dependencies of eclipse ), and noticed that package "org.apache.sling.api.wrappers" is showing empty? ObjectConverter class which is not found is being referred from this package. Since the package is not present, we won't find this class. Is there any way we can fix it?

java.lang.NoClassDefFoundError: org/apache/sling/api/wrappers/impl/ObjectConverter

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    9 replies

    juan-ayala
    Level 1
    May 28, 2019 10:25 PM UTC

    Try adding this to your POM (notice its scoped to test)

                <dependency>

                    <groupId>org.apache.sling</groupId>

                    <artifactId>org.apache.sling.api</artifactId>

                    <version>2.18.4</version>

                    <scope>test</scope>

                </dependency>

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      alagarragavan
      New Participant
      Apr 11, 2020 4:18 PM UTC

      It worked ! Thanks

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      prateeka1214461
      New Participant
      May 13, 2019 11:49 AM UTC

      HI,

      did you find an answer to this error?

      I am facing the same issue.

      I am upgrading from AEM 6.2 to AEM 6.5.

      java.lang.NoClassDefFoundError: org/apache/sling/api/wrappers/impl/ObjectConverter

              at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

              at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

              at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)

              at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

              at org.apache.sling.api.wrappers.ValueMapDecorator.get(ValueMapDecorator.java:56)

              at org.apache.sling.testing.resourceresolver.DeepReadModifiableValueMapDecorator.get(DeepReadModifiableValueMapDecorator.java:73)

              at org.apache.sling.testing.resourceresolver.MockValueMap.get(MockValueMap.java:87)

              at org.apache.sling.testing.resourceresolver.MockResource.getResourceType(MockResource.java:71)

              at x.x.x.x.models.TestHelloWorldModel.testHelloWorld(TestHelloWorldModel.java:44)

      Regards,

      Prateek

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      Gaurav-Behl
      Gaurav-Behl
      Level 10
      Feb 6, 2019 9:14 PM UTC

      I believe this wrapper package implementation gets resolved via other transitive dependencies

      check this  --

      /**
      * This is copied from org.apache.sling.api.wrappers.impl.ObjectConverter
      * to avoid dependency to latest Sling API.
      * This can be removed when Sling API 2.17.0 or higher is referenced.
      */

      sling-org-apache-sling-fsresource/ObjectConverter.java at master · apache/sling-org-apache-sling-fsresource · GitHub

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      karanmahiAuthor
      Level 4
      Feb 7, 2019 5:44 PM UTC

      gauravb10066713 - What changes do you suggest to fix this, because our junits are looking for ObjectConverter in this package org/apache/sling/api/wrappers/impl/ObjectConverter through transitive dependency.

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      Gaurav-Behl
      Gaurav-Behl
      Level 10
      Feb 7, 2019 6:09 PM UTC

      You would need to update/fix your pom.xml per requirement with specific library versions and specific scope. It also depends on what maven archetype do you currently use and other osgi/scr annotation versions.

      You may want to check WKND tutorial poms and take a reference about what versions are included. Alternatively, you may share your project code/pom.xmls so that I could check it.

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