Caused by: java.lang.ClassNotFoundException: org.gradle.wrapper.GradleWrapperMain

When trying to use the gradle wrapper, I keep getting the error above.

Here is my build file

apply plugin: 'war'
apply plugin: 'groovy'
apply plugin: 'idea'
apply plugin: 'jetty'
apply plugin: 'project-report'
  basePackageDir = 'com/mycompany/someproject'
  allprojects {
 sourceCompatibility = 1.6
  idea {
  project {
    jdkName = '1.6'
    languageLevel = '1.5'
  jettyRun {
    httpPort = 9090
    stopKey = 'pa$$!'
  [compileJava, compileTestJava]*.options*.compilerArgs = ['-Xlint:all']
  task wrap( type: Wrapper ) { gradleVersion = '1.0-milestone-7' }

Steps: > gradle wrap > ./gradlew clean

Then, I get the error.

I can however run gradle alone. i.e. gradle clean

Gradle Info: ------------------------------------------------------------ Gradle 1.0-milestone-7 ------------------------------------------------------------

Gradle build time: Thursday, January 5, 2012 10:24:43 AM UTC Groovy: 1.8.4 Ant: Apache Ant™ version 1.8.2 compiled on December 20 2010 Ivy: 2.2.0 JVM: 1.6.0_29 (Sun Microsystems Inc. 20.4-b02) OS: Windows 7 6.1 x86

Please advice.


Do you have a stacktrace for the failure? You can run with the --stacktrace option to get a stacktrace.

Adam - running ./gradlew --stacktrace clean yields the same error.

It is as though, it can’t find the gradle executable.

I am running cygwin on windows.

I have narrowed it down to this.

Running ./gradlew in the cygwin shell doesn’t work.

However, running ./gradlew.bat works just fine.

I have run this things this way and only started hitting this errors when I re-created the wrapper with the new milestone.

Any clues?

Can you just post the complete output you get (unchanged)?

From my experience, running Gradle in cygwin is problematic. For example, I’ve been seeing a tenfold increase in startup time compared to the command prompt. I don’t know who’s to blame for this.

Thanks David, I’ve just wasted a whole day wondering why I was getting this error. Feel like a complete idiiot now!

I was getting this too - I found that I hadn’t committed the gradle/wrapper/gradle-wrapper.jar, due to jars being on my git ignore list.

‘git add -f gradle/wrapper/gradle-wrapper.jar’ did the trick.