Throwable at com.intellij.openapi.application.TransactionGuardImpl.assertWriteSafeContext(TransactionGuardImpl.java:247)

**172.3095.1**

To reproduce: from New Project wizard choose Application Forge, accept all defaults. Project is created with exception (IDE reports plugin JavaEE to be in charge..):

Write-unsafe context! Model changes are allowed from write-safe contexts only. Please ensure you're using invokeLater/invokeAndWait with a correct modality state (not "any"). See TransactionGuard documentation for details.
current modality=ModalityState:
known modalities={ModalityState.NON_MODAL=true}

java.lang.Throwable

```
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:132)
at com.intellij.openapi.application.TransactionGuardImpl.assertWriteSafeContext(TransactionGuardImpl.java:247)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.executeProjectChangeAction(ExternalSystemApiUtil.java:456)
at org.jetbrains.plugins.gradle.service.project.data.javaee.JavaeeProjectDataService.importData(JavaeeProjectDataService.java:96)
at org.jetbrains.plugins.gradle.service.project.data.javaee.WebModuleGradleDataService.importData(WebModuleGradleDataService.java:97)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.a(ProjectDataManagerImpl.java:259)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:144)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:210)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:217)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$2.onSuccess(ExternalSystemUtil.java:301)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.execute(ExternalSystemUtil.java:420)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$5.run(ExternalSystemUtil.java:477)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:718)
at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:170)
at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:548)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:493)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:94)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:165)
at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:343)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
```

java.lang.Throwable

```
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:132)
at com.intellij.openapi.application.TransactionGuardImpl.assertWriteActionAllowed(TransactionGuardImpl.java:230)
at com.intellij.psi.impl.PsiModificationTrackerImpl.fireEvent(PsiModificationTrackerImpl.java:73)
at com.intellij.psi.impl.PsiModificationTrackerImpl.treeChanged(PsiModificationTrackerImpl.java:100)
at com.intellij.psi.impl.PsiManagerImpl.fireEvent(PsiManagerImpl.java:368)
at com.intellij.psi.impl.PsiManagerImpl.beforePropertyChange(PsiManagerImpl.java:284)
at com.intellij.psi.impl.file.impl.PsiVFSListener$MyModuleRootListener$1.run(PsiVFSListener.java:656)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1031)
at com.intellij.psi.impl.file.impl.PsiVFSListener$MyModuleRootListener.beforeRootsChange(PsiVFSListener.java:643)
at sun.reflect.GeneratedMethodAccessor56.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.util.messages.impl.MessageBusConnectionImpl.deliverMessage(MessageBusConnectionImpl.java:117)
at com.intellij.util.messages.impl.MessageBusImpl.doPumpMessages(MessageBusImpl.java:443)
at com.intellij.util.messages.impl.MessageBusImpl.pumpWaitingBuses(MessageBusImpl.java:404)
at com.intellij.util.messages.impl.MessageBusImpl.pumpMessages(MessageBusImpl.java:393)
at com.intellij.util.messages.impl.MessageBusImpl.pumpMessages(MessageBusImpl.java:381)
at com.intellij.util.messages.impl.MessageBusImpl.sendMessage(MessageBusImpl.java:374)
at com.intellij.util.messages.impl.MessageBusImpl.access$200(MessageBusImpl.java:45)
at com.intellij.util.messages.impl.MessageBusImpl$2.invoke(MessageBusImpl.java:231)
at com.sun.proxy.$Proxy98.beforeRootsChange(Unknown Source)
at com.intellij.openapi.roots.impl.ProjectRootManagerComponent.fireBeforeRootsChangeEvent(ProjectRootManagerComponent.java:189)
at com.intellij.openapi.roots.impl.ProjectRootManagerImpl.b(ProjectRootManagerImpl.java:373)
at com.intellij.openapi.roots.impl.ProjectRootManagerImpl.access$200(ProjectRootManagerImpl.java:53)
at com.intellij.openapi.roots.impl.ProjectRootManagerImpl$BatchSession.beforeRootsChanged(ProjectRootManagerImpl.java:109)
at com.intellij.openapi.roots.impl.ProjectRootManagerImpl.makeRootsChange(ProjectRootManagerImpl.java:345)
at com.intellij.javaee.web.facet.WebFacetImpl.lambda$addWebRoot$0(WebFacetImpl.java:121)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1031)
at com.intellij.javaee.web.facet.WebFacetImpl.addWebRoot(WebFacetImpl.java:121)
at com.intellij.javaee.web.facet.WebFacetImpl.addWebRoot(WebFacetImpl.java:127)
at org.jetbrains.plugins.gradle.service.project.data.javaee.WebModuleGradleDataService.addWebRoot(WebModuleGradleDataService.java:235)
at org.jetbrains.plugins.gradle.service.project.data.javaee.WebModuleGradleDataService.createOrReplaceWebFacet(WebModuleGradleDataService.java:188)
at org.jetbrains.plugins.gradle.service.project.data.javaee.WebModuleGradleDataService.configureJavaeeModule(WebModuleGradleDataService.java:126)
at org.jetbrains.plugins.gradle.service.project.data.javaee.WebModuleGradleDataService.configureJavaeeModule(WebModuleGradleDataService.java:72)
at org.jetbrains.plugins.gradle.service.project.data.javaee.JavaeeProjectDataService$1.execute(JavaeeProjectDataService.java:99)
at com.intellij.openapi.externalSystem.util.DisposeAwareProjectChange.run(DisposeAwareProjectChange.java:36)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.lambda$null$6(ExternalSystemApiUtil.java:457)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1031)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.lambda$executeProjectChangeAction$7(ExternalSystemApiUtil.java:457)
at com.intellij.openapi.application.impl.LaterInvocator$1.run(LaterInvocator.java:163)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.a(LaterInvocator.java:416)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:399)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:821)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:649)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:365)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
```

java.lang.Throwable

```
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:132)
at com.intellij.openapi.application.TransactionGuardImpl.assertWriteSafeContext(TransactionGuardImpl.java:247)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.executeProjectChangeAction(ExternalSystemApiUtil.java:456)
at org.jetbrains.plugins.gradle.service.project.data.javaee.JavaeeProjectDataService.importData(JavaeeProjectDataService.java:96)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.a(ProjectDataManagerImpl.java:259)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:144)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:210)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:217)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$2.onSuccess(ExternalSystemUtil.java:301)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.execute(ExternalSystemUtil.java:420)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$5.run(ExternalSystemUtil.java:477)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:718)
at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:170)
at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:548)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:493)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:94)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:165)
at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:343)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
```

java.lang.Throwable

```
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:132)
at com.intellij.openapi.application.TransactionGuardImpl.assertWriteSafeContext(TransactionGuardImpl.java:247)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.executeProjectChangeAction(ExternalSystemApiUtil.java:456)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.a(ProjectDataManagerImpl.java:404)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:151)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:210)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:217)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$2.onSuccess(ExternalSystemUtil.java:301)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$3.execute(ExternalSystemUtil.java:420)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$5.run(ExternalSystemUtil.java:477)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:718)
at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:170)
at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:548)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:493)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:94)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:165)
at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:343)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
```

java.lang.Throwable

```
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:132)
at com.intellij.openapi.application.TransactionGuardImpl.assertWriteActionAllowed(TransactionGuardImpl.java:230)
at com.intellij.psi.impl.PsiModificationTrackerImpl.fireEvent(PsiModificationTrackerImpl.java:73)
at com.intellij.psi.impl.PsiModificationTrackerImpl.treeChanged(PsiModificationTrackerImpl.java:100)
at com.intellij.psi.impl.PsiManagerImpl.fireEvent(PsiManagerImpl.java:368)
at com.intellij.psi.impl.PsiManagerImpl.beforePropertyChange(PsiManagerImpl.java:284)
at com.intellij.psi.impl.file.impl.PsiVFSListener$MyModuleRootListener$1.run(PsiVFSListener.java:656)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1031)
at com.intellij.psi.impl.file.impl.PsiVFSListener$MyModuleRootListener.beforeRootsChange(PsiVFSListener.java:643)
at sun.reflect.GeneratedMethodAccessor56.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.util.messages.impl.MessageBusConnectionImpl.deliverMessage(MessageBusConnectionImpl.java:117)
at com.intellij.util.messages.impl.MessageBusImpl.doPumpMessages(MessageBusImpl.java:443)
at com.intellij.util.messages.impl.MessageBusImpl.pumpWaitingBuses(MessageBusImpl.java:404)
at com.intellij.util.messages.impl.MessageBusImpl.pumpMessages(MessageBusImpl.java:393)
at com.intellij.util.messages.impl.MessageBusImpl.pumpMessages(MessageBusImpl.java:381)
at com.intellij.util.messages.impl.MessageBusImpl.sendMessage(MessageBusImpl.java:374)
at com.intellij.util.messages.impl.MessageBusImpl.access$200(MessageBusImpl.java:45)
at com.intellij.util.messages.impl.MessageBusImpl$2.invoke(MessageBusImpl.java:231)
at com.sun.proxy.$Proxy98.beforeRootsChange(Unknown Source)
at com.intellij.openapi.roots.impl.ProjectRootManagerComponent.fireBeforeRootsChangeEvent(ProjectRootManagerComponent.java:189)
at com.intellij.openapi.roots.impl.ProjectRootManagerImpl.b(ProjectRootManagerImpl.java:373)
at com.intellij.openapi.roots.impl.ProjectRootManagerImpl.access$200(ProjectRootManagerImpl.java:53)
at com.intellij.openapi.roots.impl.ProjectRootManagerImpl$BatchSession.beforeRootsChanged(ProjectRootManagerImpl.java:109)
at com.intellij.openapi.roots.impl.ProjectRootManagerImpl.makeRootsChange(ProjectRootManagerImpl.java:345)
at com.intellij.openapi.module.impl.ModuleManagerImpl.a(ModuleManagerImpl.java:908)
at com.intellij.openapi.module.impl.ModuleManagerImpl.access$1400(ModuleManagerImpl.java:72)
at com.intellij.openapi.module.impl.ModuleManagerImpl$ModuleModelImpl.a(ModuleManagerImpl.java:818)
at com.intellij.openapi.module.impl.ModuleManagerImpl$ModuleModelImpl.access$1200(ModuleManagerImpl.java:598)
at com.intellij.openapi.module.impl.ModuleManagerImpl.commitModelWithRunnable(ModuleManagerImpl.java:589)
at com.intellij.openapi.roots.impl.ModifiableModelCommitter.multiCommit(ModifiableModelCommitter.java:50)
at com.intellij.openapi.roots.impl.ModifiableModelCommitter.multiCommit(ModifiableModelCommitter.java:39)
at com.intellij.openapi.externalSystem.service.project.AbstractIdeModifiableModelsProvider.b(AbstractIdeModifiableModelsProvider.java:401)
at com.intellij.openapi.roots.impl.ProjectRootManagerImpl.mergeRootsChangesDuring(ProjectRootManagerImpl.java:311)
at com.intellij.openapi.externalSystem.service.project.AbstractIdeModifiableModelsProvider.commit(AbstractIdeModifiableModelsProvider.java:387)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl$2.execute(ProjectDataManagerImpl.java:408)
at com.intellij.openapi.externalSystem.util.DisposeAwareProjectChange.run(DisposeAwareProjectChange.java:36)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.lambda$null$6(ExternalSystemApiUtil.java:457)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1031)
at com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil.lambda$executeProjectChangeAction$7(ExternalSystemApiUtil.java:457)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.a(LaterInvocator.java:416)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:399)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:821)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:649)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:365)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
```

---

*Imported from [IDEA-174732](https://youtrack.jetbrains.com/issue/IDEA-174732) · Type: Exception · Votes: 0*
*Comments, attachments, dates and reporter are not part of the export — follow the link above for the full history.*

Reproduce the failure in IntelliJ IDEA 172.3095.1 by creating an Application Forge project with the default New Project wizard options. Start with JavaeeProjectDataService.importData and WebModuleGradleDataService, then trace the write-safe context failure through ExternalSystemApiUtil.executeProjectChangeAction. Done means project creation and Gradle import complete without the reported exception.

Written by the indexing model from the issue text.