title: Java: gradle build failed bootRepackage (on create jar)
body: <p>Doing a web project means: Java (jdk 1.7.0.51) + Spring framework (+velocity) + Hibernate + Gradle + Apache Tomcat.
  Suddenly, there was a problem: you can not make a build. To build using Gradle.</p>
  
  <blockquote>
    <p>16:50:30: Executing external task 'build'...
    :compileJava
    :processResources UP-TO-DATE
    :classes
    :jar
    :bootRepackage FAILED
    FAILURE: Build failed with an exception.
    * What went wrong:
    Execution failed for task ':bootRepackage'.
    MALFORMED
    * Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
    BUILD FAILED
    Total time: 14.935 secs
    MALFORMED</p>
  </blockquote>
  
  <p>What could be the problem?</p>
  
  <p>The full log:</p>
  
  <blockquote>
    <p>:bootRepackage FAILED<br>
    FAILURE: Build failed with an exception.<br>
    * What went wrong:
    Execution failed for task ':bootRepackage'.
    MALFORMED<br>
    * Try:<br>
    Run with --info or --debug option to get more log output.<br>
    * Exception is:
    org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':bootRepackage'.
           at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.
    java:69)
            at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46
    )
            at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskEx
    ecuter.java:35)
            at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64)
            at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
            at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExec
    uter.java:42)
            at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.j
    ava:52)
            at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
            at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.j
    ava:43)
            at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailure(AbstractTask.java:286)
            at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.executeTask(AbstractTaskPlanExecut
    or.java:79)
            at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecut
    or.java:63)
            at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:
    51)
            at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$1.run(DefaultTaskPlanExecutor.java:33)
            at org.gradle.internal.Factories$1.create(Factories.java:22)
            at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:198)
            at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:266)
            at org.gradle.cache.internal.DefaultPersistentDirectoryStore.longRunningOperation(DefaultPersistentDirectoryStor
    e.java:135)
            at org.gradle.api.internal.changedetection.state.DefaultTaskArtifactStateCacheAccess.longRunningOperation(Defaul
    tTaskArtifactStateCacheAccess.java:93)
            at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:31)
            at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:86)
            at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:29)
            at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
            at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
            at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67)
            at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
            at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
            at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:54)
            at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:166)
            at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:113)
            at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:81)
            at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter
    .java:64)
            at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:33)
            at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:24)
            at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:35)
            at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:26)
            at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:50)
            at org.gradle.api.internal.Actions$RunnableActionAdapter.execute(Actions.java:171)
            at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:20
    1)
            at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:17
    4)
            at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:170)
            at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:139)
            at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
            at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
            at org.gradle.launcher.Main.doAction(Main.java:46)
            at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
            at org.gradle.launcher.Main.main(Main.java:37)
            at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:50)
            at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:32)
            at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
            at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:30)
            at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:127)
            at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:58)
    Caused by: java.lang.IllegalArgumentException: MALFORMED
            at org.springframework.boot.loader.tools.MainClassFinder.getClassEntries(MainClassFinder.java:237)
            at org.springframework.boot.loader.tools.MainClassFinder.doWithMainClasses(MainClassFinder.java:200)
            at org.springframework.boot.loader.tools.MainClassFinder.findSingleMainClass(MainClassFinder.java:187)
            at org.springframework.boot.loader.tools.Repackager.findMainMethod(Repackager.java:228)
            at org.springframework.boot.gradle.repackage.RepackageTask$LoggingRepackager.findMainMethod(RepackageTask.java:2
    19)
            at org.springframework.boot.loader.tools.Repackager.buildManifest(Repackager.java:206)
            at org.springframework.boot.loader.tools.Repackager.repackage(Repackager.java:139)
            at org.springframework.boot.loader.tools.Repackager.repackage(Repackager.java:122)
            at org.springframework.boot.gradle.repackage.RepackageTask$RepackageAction.repackage(RepackageTask.java:173)
            at org.springframework.boot.gradle.repackage.RepackageTask$RepackageAction.execute(RepackageTask.java:138)
            at org.springframework.boot.gradle.repackage.RepackageTask$RepackageAction.execute(RepackageTask.java:1)
            at org.gradle.api.internal.Actions$FilteredAction.execute(Actions.java:203)
            at org.gradle.api.internal.DefaultDomainObjectCollection.all(DefaultDomainObjectCollection.java:110)
            at org.gradle.api.internal.DefaultDomainObjectCollection.withType(DefaultDomainObjectCollection.java:120)
            at org.springframework.boot.gradle.repackage.RepackageTask.repackage(RepackageTask.java:89)
            at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63)
            at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.doExecute(Anno
    tationProcessingTaskFactory.java:219)
            at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(Annota
    tionProcessingTaskFactory.java:212)
            at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(Annota
    tionProcessingTaskFactory.java:201)
            at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:530)
            at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:513)
            at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.j
    ava:80)
            at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.
    java:61)
            ... 52 more<br>
    BUILD FAILED<br>
    Total time: 13.0 secs</p>
  </blockquote>