During dependency resolving a build failed with following output:
:compileJava
FAILURE: Build failed with an exception.
* What went wrong:
Could not resolve all dependencies for configuration ':compile'.
> Could not resolve org.confusion.web:webservice-http-client:15.09.00.+.
Required by:
org.confusion.web:portal:15.11.00.00555
org.confusion.web:portal:15.11.00.00555 > org.confusion.web:commons:15.09.00.00106
> Comparison method violates its general contract!
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Gradle Version: 2.3
Java:
java version "1.7.0_75"
OpenJDK Runtime Environment (rhel-2.5.4.0.el6_6-x86_64 u75-b13)
OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)
This happened on a Jenkins build server, and it happened for several projects at roughly the same time, which all depend on this webservices-http-client library.
Unfortunately running it again with the --stacktrace option could not reveal any more details about the contract violator, because then (the morning afterwards) the build succeeded again.
As can be seen, we are using a special versioning pattern for our artifacts, including a dynamic version:
A.B.C.D
where
A = year
B = month
C = release
D = build
with D being the dynamic version.
With this little information and the error being unreproducible, i guess one could only do some code inspection on the various comparable implementations called during depencendy resolving, if they might potentially break during a special phase of the moon.
I’ll gladly continue investigations on this, if somebody can hint me in the right direction, i’ve not yet strayed in the gradle sources.
The fact that this happens sporadically might be due to caching of the dependency resolution results. The best way to check would be to execute your build using a clean gradle cache. A non-destructive way to do this is to use a temporary user.home directory:
Thanks for the info about the temporary home, i wasnt aware of that trick.
As soon as i caught another build failing the same way, i rushed to re-run it with the temporary home dir and the --stacktrace argument. The build still failed so i guess this means the arbitrary failing is not related to the caching of resolution results.
The stacktrace luckily shows a suspect for the contract violator: NewestVersionComponentChooser
FAILURE: Build failed with an exception.
* What went wrong:
Could not resolve all dependencies for configuration ':compile'.
> Could not resolve org.confusion.web:webservice-http-client:15.09.00.+.
Required by:
org.confusion.web:portal-backend:15.11.00.00416
org.confusion.web:portal-backend:15.11.00.00416 > org.confusion.web:commons:15.09.00.00110
> Comparison method violates its general contract!
* Try:
Run with --info or --debug option to get more log output.
* Exception is:
org.gradle.api.artifacts.ResolveException: Could not resolve all dependencies for configuration ':compile'.
at org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration.rethrowFailure(DefaultLenientConfiguration.java:52)
at org.gradle.api.internal.artifacts.ivyservice.DefaultResolvedConfiguration.rethrowFailure(DefaultResolvedConfiguration.java:36)
at org.gradle.api.internal.artifacts.ivyservice.SelfResolvingDependencyResolver$FilesAggregatingResolvedConfiguration.rethrowFailure(SelfResolvingDependencyResolver.java:110)
at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingArtifactDependencyResolver$ErrorHandlingResolvedConfiguration.rethrowFailure(ErrorHandlingArtifactDependencyResolver.java:180)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:444)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getFiles(DefaultConfiguration.java:205)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration_Decorated.getFiles(Unknown Source)
at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext$FileTreeConverter.convertInto(DefaultFileCollectionResolveContext.java:191)
at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:103)
at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileTrees(DefaultFileCollectionResolveContext.java:75)
at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext$FileTreeConverter.convertInto(DefaultFileCollectionResolveContext.java:182)
at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.doResolve(DefaultFileCollectionResolveContext.java:98)
at org.gradle.api.internal.file.collections.DefaultFileCollectionResolveContext.resolveAsFileTrees(DefaultFileCollectionResolveContext.java:75)
at org.gradle.api.internal.file.CompositeFileCollection$1.resolve(CompositeFileCollection.java:88)
at org.gradle.api.internal.file.CompositeFileCollection.getSourceCollections(CompositeFileCollection.java:143)
at org.gradle.api.internal.file.CompositeFileTree.getSourceCollections(CompositeFileTree.java:30)
at org.gradle.api.internal.file.CompositeFileCollection.getFiles(CompositeFileCollection.java:38)
at org.gradle.api.internal.changedetection.state.DefaultFileCollectionSnapshotter.snapshot(DefaultFileCollectionSnapshotter.java:47)
at org.gradle.api.internal.changedetection.rules.TaskUpToDateState.<init>(TaskUpToDateState.java:55)
at org.gradle.api.internal.changedetection.changes.DefaultTaskArtifactStateRepository$TaskArtifactStateImpl.getStates(DefaultTaskArtifactStateRepository.java:126)
at org.gradle.api.internal.changedetection.changes.DefaultTaskArtifactStateRepository$TaskArtifactStateImpl.isUpToDate(DefaultTaskArtifactStateRepository.java:69)
at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:52)
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:42)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailure(AbstractTask.java:306)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.executeTask(AbstractTaskPlanExecutor.java:79)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:63)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:51)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:23)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:88)
at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:29)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:62)
at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:68)
at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:62)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:55)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:149)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:106)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:86)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:80)
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:36)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:26)
at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:51)
at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:169)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:237)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:210)
at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:35)
at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:206)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:169)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
at org.gradle.launcher.Main.doAction(Main.java:33)
at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:54)
at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:35)
at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:30)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:127)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:55)
Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve org.confusion.web:webservice-http-client:15.09.00.+.
Required by:
org.confusion.web:portal-backend:15.11.00.00416
org.confusion.web:portal-backend:15.11.00.00416 > org.confusion.web:commons:15.09.00.00110
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.DynamicVersionResolver.resolve(DynamicVersionResolver.java:74)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainAdapter.resolve(RepositoryChainAdapter.java:52)
at org.gradle.api.internal.artifacts.ivyservice.projectmodule.ProjectDependencyResolver.resolve(ProjectDependencyResolver.java:48)
at org.gradle.api.internal.artifacts.ivyservice.VersionForcingDependencyToModuleResolver.resolve(VersionForcingDependencyToModuleResolver.java:50)
at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$ModuleVersionSelectorResolveState.resolveModuleRevisionId(DependencyGraphBuilder.java:877)
at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$DependencyEdge.resolveModuleRevisionId(DependencyGraphBuilder.java:228)
at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder.traverseGraph(DependencyGraphBuilder.java:115)
at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder.resolveDependencyGraph(DependencyGraphBuilder.java:90)
at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder.resolve(DependencyGraphBuilder.java:80)
at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultDependencyResolver$1.execute(DefaultDependencyResolver.java:122)
at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultDependencyResolver$1.execute(DefaultDependencyResolver.java:88)
at org.gradle.internal.Transformers$4.transform(Transformers.java:137)
at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyContextManager.withIvy(DefaultIvyContextManager.java:61)
at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyContextManager.withIvy(DefaultIvyContextManager.java:39)
at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultDependencyResolver.resolve(DefaultDependencyResolver.java:88)
at org.gradle.api.internal.artifacts.ivyservice.CacheLockingArtifactDependencyResolver$1.run(CacheLockingArtifactDependencyResolver.java:42)
at org.gradle.internal.Factories$1.create(Factories.java:22)
at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:192)
at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:175)
at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:106)
at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.useCache(DefaultCacheFactory.java:187)
at org.gradle.api.internal.artifacts.ivyservice.DefaultCacheLockingManager.useCache(DefaultCacheLockingManager.java:64)
at org.gradle.api.internal.artifacts.ivyservice.CacheLockingArtifactDependencyResolver.resolve(CacheLockingArtifactDependencyResolver.java:40)
at org.gradle.api.internal.artifacts.ivyservice.SelfResolvingDependencyResolver.resolve(SelfResolvingDependencyResolver.java:45)
at org.gradle.api.internal.artifacts.ivyservice.ShortcircuitEmptyConfigsArtifactDependencyResolver.resolve(ShortcircuitEmptyConfigsArtifactDependencyResolver.java:55)
at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingArtifactDependencyResolver.resolve(ErrorHandlingArtifactDependencyResolver.java:47)
at org.gradle.api.internal.artifacts.ivyservice.DefaultConfigurationResolver.resolve(DefaultConfigurationResolver.java:46)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveNow(DefaultConfiguration.java:250)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getResolvedConfiguration(DefaultConfiguration.java:240)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration_Decorated.getResolvedConfiguration(Unknown Source)
at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:442)
... 61 more
Caused by: java.lang.IllegalArgumentException: Comparison method violates its general contract!
at org.gradle.util.CollectionUtils.sort(CollectionUtils.java:84)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.NewestVersionComponentChooser.sortLatestFirst(NewestVersionComponentChooser.java:115)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.NewestVersionComponentChooser.choose(NewestVersionComponentChooser.java:79)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.DynamicVersionResolver$RepositoryResolveState.resolveDependency(DynamicVersionResolver.java:184)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.DynamicVersionResolver$RepositoryResolveState.process(DynamicVersionResolver.java:175)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.DynamicVersionResolver$RepositoryResolveState.resolve(DynamicVersionResolver.java:161)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.DynamicVersionResolver.findLatestModule(DynamicVersionResolver.java:106)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.DynamicVersionResolver.findLatestModule(DynamicVersionResolver.java:90)
at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.DynamicVersionResolver.resolve(DynamicVersionResolver.java:63)
... 91 more
BUILD FAILED
I did not have the time yet to check the source code, but i’ll try to reproduce this with a testcase. It might really be related to the strange versioning pattern hitting a loophole in that comparator.
As soon as i can reproduce this issue in an environment where i can control the gradle version, i will also try it with the 2.7 release.
Update:
I could verify that this is not occurring with gradle 2.7
Since all our builds now started to fail consistently with this exception i’m forced to do the upgrade which i wanted to do for a long time anyway.
