Abort Core extension repository updater Thread when XWiki is stopping

10-Mar-2016 15:49:45.817 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [xwiki] appears to have started a thread named [Core extension repository updater] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 java.io.FileOutputStream.open0(Native Method)
 java.io.FileOutputStream.open(FileOutputStream.java:270)
 java.io.FileOutputStream.<init>(FileOutputStream.java:213)
 java.io.FileOutputStream.<init>(FileOutputStream.java:162)
 org.eclipse.aether.internal.impl.DefaultFileProcessor.write(DefaultFileProcessor.java:96)
 org.eclipse.aether.connector.basic.ChecksumValidator.commit(ChecksumValidator.java:240)
 org.eclipse.aether.connector.basic.BasicRepositoryConnector$GetTaskRunner.runTask(BasicRepositoryConnector.java:475)
 org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:350)
 org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:67)
 org.eclipse.aether.connector.basic.BasicRepositoryConnector$DirectExecutor.execute(BasicRepositoryConnector.java:581)
 org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:249)
 org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:520)
 org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:421)
 org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:246)
 org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:223)
 org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.loadPom(AetherExtensionRepository.java:457)
 org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.resolveMaven(AetherExtensionRepository.java:356)
 org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.resolveMaven(AetherExtensionRepository.java:345)
 org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.resolveMaven(AetherExtensionRepository.java:339)
 org.xwiki.extension.repository.aether.internal.AetherExtensionRepository.resolve(AetherExtensionRepository.java:190)
 org.xwiki.extension.repository.internal.DefaultExtensionRepositoryManager.resolve(DefaultExtensionRepositoryManager.java:213)
 org.xwiki.extension.repository.internal.core.DefaultCoreExtensionScanner.updateExtensions(DefaultCoreExtensionScanner.java:187)
 org.xwiki.extension.repository.internal.core.DefaultCoreExtensionRepository$1.run(DefaultCoreExtensionRepository.java:134)
 java.lang.Thread.run(Thread.java:745)