Hi Vladimir, I had the same error: Unable to load class 'org.gradle.api.internal.plugins.DefaultConvention'.
IntelliJ IDEA 2018.3.4 (Community Edition) Build #IC-183.5429.30, built on January 28, 2019 JRE: 1.8.0_152-release-1343-b26 x86_64 JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o macOS 10.14.4 - Haisheng ------------------------------------------------------------------ 发件人：Danny Chan<[email protected]> 日 期：2019年11月20日 17:31:18 收件人：<[email protected]> 主 题：Re: CALCITE-2905: Maven -> Gradle: any thoughts When I use the IDEA 2019.9 version, it works ~ But the travis test is failing for the slow test: here is my log https://travis-ci.org/apache/calcite/jobs/614406384?utm_medium=notification&utm_source=github_status Best, Danny Chan 在 2019年11月20日 +0800 PM2:28，Vladimir Sitnikov <[email protected]>，写道： > > Here is the stacktrace: > java.lang.NoClassDefFoundError: org/gradle/api/internal/plugin > s/DefaultConvention > at org.jetbrains.plugins.gradle.tooling.builder.ProjectExtensio > nsDataBuilderImpl.buildAll(ProjectExtensionsDataBuilderImpl.groovy:50) > > What is IDEA version? > > Vladimir
