getClassLoaderCache error when upgrading Gradle from 6.7 to 7.0.1

Question

I'm fairly new to Gradle. Whenever I try to upgrade an existing project from 6.7 to 7.0.1 a traceback comes up as

java.lang.NoSuchMethodException: org.gradle.api.tasks.testing.Test.getClassLoaderCache()

Is there any workaround or missing dependency that I'm overlooking?

Answer 1

I had the same problem and could solve it by upgrading one of my plugins. From

 plugins {
     id 'org.gradle.test-retry' version '1.1.3'
 }

to

 plugins {
     id 'org.gradle.test-retry' version '1.3.1'
 }

So perhaps checking your plugins might help. Shame that the Gradle exception doesn't help at all.