Using a map in build.gradle throws NoClassDefFoundError: [Ljava/util/HashMap$Entry

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1

Gradle 1.12 with Java 1.8.0_05-b13 completely broke my build. Steps to reproduce: 1. Clone https://github.com/abhijitsarkar/build-tools.git 2. cd gradle-common 3. ./gradlew clean build

19:39:32.311 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception. 19:39:32.312 [ERROR] [org.gradle.BuildExceptionReporter]

19:39:32.313 [ERROR] [org.gradle.BuildExceptionReporter] * Where: 19:39:32.314 [ERROR] [org.gradle.BuildExceptionReporter] Build file ‘/Users/Abhijit/Repositories/git/build-tools/gradle-common/build.gradle’ line: 13 19:39:32.315 [ERROR] [org.gradle.BuildExceptionReporter]

19:39:32.317 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong: 19:39:32.318 [ERROR] [org.gradle.BuildExceptionReporter] A problem occurred evaluating root project ‘gradle-common’. 19:39:32.319 [ERROR] [org.gradle.BuildExceptionReporter] > [Ljava/util/HashMap$Entry; 19:39:32.325 [ERROR] [org.gradle.BuildExceptionReporter]

19:39:32.325 [ERROR] [org.gradle.BuildExceptionReporter] * Exception is: 19:39:32.327 [ERROR] [org.gradle.BuildExceptionReporter] org.gradle.api.GradleScriptException: A problem occurred evaluating root project ‘gradle-common’.

…

19:39:32.386 [ERROR] [org.gradle.BuildExceptionReporter] Caused by: java.lang.NoClassDefFoundError: [Ljava/util/HashMap$Entry; 19:39:32.388 [ERROR] [org.gradle.BuildExceptionReporter] at build_1bedokv7au4jhdvp9d373qhbtr.run(/Users/Abhijit/Repositories/git/build-tools/gradle-common/build.gradle:13) 19:39:32.389 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:52) 19:39:32.390 [ERROR] [org.gradle.BuildExceptionReporter] … 53 more 19:39:32.391 [ERROR] [org.gradle.BuildExceptionReporter] Caused by: java.lang.ClassNotFoundException: java.util.HashMap$Entry 19:39:32.391 [ERROR] [org.gradle.BuildExceptionReporter] … 55 more

2

Gradle 1.12 doesn’t officially support to be executed under Java 1.8. Among other things, it’s based on a Groovy version which doesn’t officially support 1.8. The goal is to have full Java 1.8 support in Gradle 2.0.

3

This is still a problem with Gradle 2.0. This is a blocker bug.

4

Cannot reproduce. Please double-check that you are running with Gradle 2.0. For me, your build fails during ‘:sample-client:findbugsMain’, presumably becauseFindBugs 2.0.3 isn’t Java 8 compatible.

5

100% positive about Gradle 2.0. I’ll follow the instructions as in original post to the letter (assuming that’s what you did) and see if I get a different result.

6
  1. Confirmed that by following the instructions as above, I can reproduce the issue. 2. Seems like lot of people have the exact same problem, including another thread in this forum. However, no one seems to have any solution. 3. A Groovy bug GROOVY-4950 was opened on this issue 2 years back. Apparently, it was fixed.

http://stackoverflow.com/questions/9103103/cglib-enhancer-of-hashmap-on-google-app-engine-throws-a-class-not-found-exceptio

https://groups.google.com/forum/#!topic/gaelyk/w_25LzOlTQ8

https://groups.google.com/forum/#!topic/google-appengine/SvjJI-h9pso

https://code.google.com/p/android/issues/detail?id=72361

Abhijits-MacBook-Pro:gradle-common Abhijit$ java -version
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)
  Abhijits-MacBook-Pro:gradle-common Abhijit$ gradle --version
  ------------------------------------------------------------
Gradle 2.0
------------------------------------------------------------
  Build time:
 2014-07-01 07:45:34 UTC
Build number: none
Revision:
   b6ead6fa452dfdadec484059191eb641d817226c
  Groovy:
     2.3.3
Ant:
        Apache Ant(TM) version 1.9.3 compiled on December 23 2013
JVM:
        1.8.0_05 (Oracle Corporation 25.5-b02)
OS:
         Mac OS X 10.9.3 x86_64
7

OK, for some reason, my Gradle wrapper was being generated for v 1.10. I updated that manually and now ConfigSluper works. However, I still converted all props[‘key’] to props.key to avoid any hassle. Upgrading FindBugs to 3.0.0 takes care of the issue you mentioned.

8

So the only problem was that you were using Gradle 1.10?

9

Yes. I’m not sure how that happened though. I regenerated the wrapper using a 2.0 version and my wrapper version was set to 2.0 as well. Still… I must’ve done something wrong.

10

I was having the same problem with Gradle 2.0 and JDK 8 when using localGroovy() as a dependency. Switching to ‘org.codehaus.groovy:groovy:2.3.3’ fixed the problem.

I’m not sure if this is a bug or not.