Occasional project creation hangs

[lanlin]

What happened

(please describe what you were doing when this exception occurred)
when new a flutter project.

Typeahead request blocked: Time: 3018; cause: No cause has been provided; runnable waiting for the focus change: Focus event list (trying to execute runnable):

Version information

Android Studio 3.2.1 • Flutter plugin io.flutter 30.0.1 • Dart plugin 181.5656

Flutter 0.11.3 • channel beta • git@github.com:flutter/flutter.git
Framework • revision 72bf075e8d (3 days ago) • 2018-11-09 20:36:17 -0800
Engine • revision 5646e86a6f
Tools • Dart 2.1.0 (build 2.1.0-dev.9.3 9c07fb64c4)

Exception

Typeahead request blocked: Time: 3018; cause: No cause has been provided; runnable waiting for the focus change: Focus event list (trying to execute runnable):

com.intellij.openapi.wm.impl.FocusManagerImpl$2: Time: 161074; cause: No cause has been provided; runnable waiting for the focus change: Focus event list (trying to execute runnable): 
	at com.intellij.openapi.wm.impl.FocusManagerImpl.typeAheadUntil(FocusManagerImpl.java:245)
	at com.intellij.openapi.wm.IdeFocusManager.typeAheadUntil(IdeFocusManager.java:91)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:387)
	at com.intellij.openapi.ui.DialogWrapper.invokeShow(DialogWrapper.java:1688)
	at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1637)
	at com.intellij.openapi.options.newEditor.SettingsDialog.lambda$show$0(SettingsDialog.java:69)
	at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:88)
	at com.intellij.openapi.application.TransactionGuardImpl.submitTransactionAndWait(TransactionGuardImpl.java:153)
	at com.intellij.openapi.options.newEditor.SettingsDialog.show(SettingsDialog.java:69)
	at com.intellij.ide.actions.ShowSettingsUtilImpl.showSettingsDialog(ShowSettingsUtilImpl.java:97)
	at com.intellij.ide.actions.ShowSettingsAction.perform(ShowSettingsAction.java:63)
	at com.intellij.ide.MacOSApplicationProvider$Worker.lambda$null$1(MacOSApplicationProvider.java:103)
	at com.intellij.ide.MacOSApplicationProvider$Worker.lambda$submit$7(MacOSApplicationProvider.java:197)
	at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:88)
	at com.intellij.openapi.application.TransactionGuardImpl.lambda$pollQueueLater$0(TransactionGuardImpl.java:74)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:447)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:431)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:415)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:762)
	at java.awt.EventQueue.access$500(EventQueue.java:98)
	at java.awt.EventQueue$3.run(EventQueue.java:715)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:732)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:822)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:763)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
	at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:190)
	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:235)
	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:233)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:233)
	at java.awt.Dialog.show(Dialog.java:1077)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:694)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:426)
	at com.intellij.openapi.ui.DialogWrapper.invokeShow(DialogWrapper.java:1688)
	at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1637)
	at io.flutter.actions.FlutterNewProjectAction.actionPerformed(FlutterNewProjectAction.java:62)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.invokeAction(ActionUtil.java:337)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.invokeAction(ActionUtil.java:324)
	at com.intellij.ui.components.labels.ActionLink$1.linkSelected(ActionLink.java:59)
	at com.intellij.ui.components.labels.LinkLabel.doClick(LinkLabel.java:142)
	at com.intellij.ui.components.labels.ActionLink.doClick(ActionLink.java:68)
	at com.intellij.ui.components.labels.LinkLabel$MyMouseHandler.mouseReleased(LinkLabel.java:319)
	at java.awt.Component.processMouseEvent(Component.java:6548)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3325)
	at java.awt.Component.processEvent(Component.java:6313)
	at java.awt.Container.processEvent(Container.java:2237)
	at java.awt.Component.dispatchEventImpl(Component.java:4903)
	at java.awt.Container.dispatchEventImpl(Container.java:2295)
	at java.awt.Component.dispatchEvent(Component.java:4725)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4889)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4526)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4467)
	at java.awt.Container.dispatchEventImpl(Container.java:2281)
	at java.awt.Window.dispatchEventImpl(Window.java:2746)
	at java.awt.Component.dispatchEvent(Component.java:4725)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
	at java.awt.EventQueue.access$500(EventQueue.java:98)
	at java.awt.EventQueue$3.run(EventQueue.java:715)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
	at java.awt.EventQueue$4.run(EventQueue.java:737)
	at java.awt.EventQueue$4.run(EventQueue.java:735)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:822)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:759)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
	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)

[jwren]

Assigning to @pq for create action io.flutter.actions.FlutterNewProjectAction.actionPerformed user action.

[pq]

@lanlin : sorry for the slow response!

This appears to be an Android Studio issue and a restart is a known work-around. Has the issue recurred?

[lanlin]

Sometimes, still being stuck about 5-10 minutes after click "start a new flutter project".
No response, no errors, like below...

[pq]

Thanks for following up @lanlin! Is your network connected when you try and create projects and they hang?

Also, could you (re)run flutter doctor -v and append the output here?

[lanlin]

Surely the network was connected.
It was stuck at the beginning step, not the step for downloading payload.
After the beginning, all the next steps work fine.

Here's the output info:

[✓] Flutter (Channel beta, v0.11.3, on Mac OS X 10.13.6 17G3025, locale zh-Hans-CN)
    • Flutter version 0.11.3 at /Users/lanlin/flutter
    • Framework revision 72bf075e8d (5 周前), 2018-11-09 20:36:17 -0800
    • Engine revision 5646e86a6f
    • Dart version 2.1.0 (build 2.1.0-dev.9.3 9c07fb64c4)

[✓] Android toolchain - develop for Android devices (Android SDK 28.0.3)
    • Android SDK at /Users/lanlin/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • ANDROID_HOME = /Users/lanlin/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
    • All Android licenses accepted.

[✓] iOS toolchain - develop for iOS devices (Xcode 9.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 9.3, Build version 9E145
    • ios-deploy 2.0.0
    • CocoaPods version 1.5.3

[✓] Android Studio (version 3.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 31.1.1
    • Dart plugin version 181.5656
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[!] Connected device
    ! No devices available

! Doctor found issues in 1 category.

[pq]

Thanks for following up @lanlin!

Looking at your output, I see you're still on a beta, it would be worth upgrading to the stable 1.0.

https://flutter.io/docs/development/tools/sdk/upgrading

A lot of improvements are included in the release so your issue may just get fixed.

Let us know how that goes.

Cheers!