"ext.flutter.driver" is not found in "extensionRPCs"

[FlutterDriver] /Users/xxxx/Library/Android/sdk/platform-tools/adb forward tcp:42559 tcp:42559
[FlutterDriver] Attempt #1
[FlutterDriver] Connecting to Dart Observatory: ws://127.0.0.1:42559/TZyCumpgCHs=/ws
[FlutterDriver] Connected to ws://127.0.0.1:42559/TZyCumpgCHs=/ws
[FlutterDriver] "ext.flutter.driver" is not found in "extensionRPCs" ["ext.ui.window.scheduleFrame"]
[FlutterDriver] Cannot get Dart Isolate
[FlutterDriver] Error: "ext.flutter.driver" is not found in "extensionRPCs" ["ext.ui.window.scheduleFrame"]
[FlutterDriver]     at Object.wrappedLogger.errorAndThrow (/usr/local/lib/node_modules/appium-flutter-driver/node_modules/appium-support/lib/logging.js:74:35)
[FlutterDriver]     at Client.onOpenListener (/usr/local/lib/node_modules/appium-flutter-driver/lib/sessions/observatory.ts:91:17)
[FlutterDriver]     at runMicrotasks (<anonymous>)
[FlutterDriver]     at processTicksAndRejections (internal/process/task_queues.js:93:5)
[FlutterDriver] Waiting 300 seconds before trying...
(node:35764) UnhandledPromiseRejectionWarning: Error: "ext.flutter.driver" is not found in "extensionRPCs" ["ext.ui.window.scheduleFrame"]
    at Object.wrappedLogger.errorAndThrow (/usr/local/lib/node_modules/appium-flutter-driver/node_modules/appium-support/lib/logging.js:74:35)
    at Client.onOpenListener (/usr/local/lib/node_modules/appium-flutter-driver/lib/sessions/observatory.ts:91:17)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
(node:35764) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 21)
[FlutterDriver] Attempt #2
[FlutterDriver] Connecting to Dart Observatory: ws://127.0.0.1:42559/TZyCumpgCHs=/ws
[FlutterDriver] Connected to ws://127.0.0.1:42559/TZyCumpgCHs=/ws
[FlutterDriver] "ext.flutter.driver" is not found in "extensionRPCs" ["ext.ui.window.scheduleFrame","ext.flutter.reassemble","ext.flutter.exit","ext.flutter.saveCompilationTrace","ext.flutter.platformOverride","ext.flutter.evict","ext.flutter.timeDilation","ext.flutter.debugPaint","ext.flutter.debugPaintBaselinesEnabled","ext.flutter.repaintRainbow","ext.flutter.debugCheckElevationsEnabled","ext.flutter.debugDumpLayerTree","ext.flutter.debugDumpRenderTree","ext.flutter.debugDumpSemanticsTreeInTraversalOrder","ext.flutter.debugDumpSemanticsTreeInInverseHitTestOrder","ext.flutter.debugDumpApp","ext.flutter.showPerformanceOverlay","ext.flutter.didSendFirstFrameEvent","ext.flutter.didSendFirstFrameRasterizedEvent","ext.flutter.profileWidgetBuilds","ext.flutter.debugAllowBanner","ext.flutter.debugWidgetInspector","ext.flutter.inspector.structuredErrors","ext.flutter.inspector.show","ext.flutter.inspector.trackRebuildDirtyWidgets","ext.flutter.inspector.trackRepaintWidgets","ext.flutter.inspector.disposeAllGroups","ext.flutter.inspector.disposeGroup","ext.flutter.inspector.isWidgetTreeReady","ext.flutter.inspector.disposeId","ext.flutter.inspector.setPubRootDirectories","ext.flutter.inspector.setSelectionById","ext.flutter.inspector.getParentChain","ext.flutter.inspector.getProperties","ext.flutter.inspector.getChildren","ext.flutter.inspector.getChildrenSummaryTree","ext.flutter.inspector.getChildrenDetailsSubtree","ext.flutter.inspector.getRootWidget","ext.flutter.inspector.getRootRenderObject","ext.flutter.inspector.getRootWidgetSummaryTree","ext.flutter.inspector.getDetailsSubtree","ext.flutter.inspector.getSelectedRenderObject","ext.flutter.inspector.getSelectedWidget","ext.flutter.inspector.getSelectedSummaryWidget","ext.flutter.inspector.isWidgetCreationTracked","ext.flutter.inspector.screenshot","ext.dart.io.getOpenFiles","ext.dart.io.getFileByID","ext.dart.io.getOpenSockets","ext.dart.io.getSocketByID"]
[FlutterDriver] Cannot get Dart Isolate
[FlutterDriver] Error: "ext.flutter.driver" is not found in "extensionRPCs" ["ext.ui.window.scheduleFrame","ext.flutter.reassemble","ext.flutter.exit","ext.flutter.saveCompilationTrace","ext.flutter.platformOverride","ext.flutter.evict","ext.flutter.timeDilation","ext.flutter.debugPaint","ext.flutter.debugPaintBaselinesEnabled","ext.flutter.repaintRainbow","ext.flutter.debugCheckElevationsEnabled","ext.flutter.debugDumpLayerTree","ext.flutter.debugDumpRenderTree","ext.flutter.debugDumpSemanticsTreeInTraversalOrder","ext.flutter.debugDumpSemanticsTreeInInverseHitTestOrder","ext.flutter.debugDumpApp","ext.flutter.showPerformanceOverlay","ext.flutter.didSendFirstFrameEvent","ext.flutter.didSendFirstFrameRasterizedEvent","ext.flutter.profileWidgetBuilds","ext.flutter.debugAllowBanner","ext.flutter.debugWidgetInspector","ext.flutter.inspector.structuredErrors","ext.flutter.inspector.show","ext.flutter.inspector.trackRebuildDirtyWidgets","ext.flutter.inspector.trackRepaintWidgets","ext.flutter.inspector.disposeAllGroups","ext.flutter.inspector.disposeGroup","ext.flutter.inspector.isWidgetTreeReady","ext.flutter.inspector.disposeId","ext.flutter.inspector.setPubRootDirectories","ext.flutter.inspector.setSelectionById","ext.flutter.inspector.getParentChain","ext.flutter.inspector.getProperties","ext.flutter.inspector.getChildren","ext.flutter.inspector.getChildrenSummaryTree","ext.flutter.inspector.getChildrenDetailsSubtree","ext.flutter.inspector.getRootWidget","ext.flutter.inspector.getRootRenderObject","ext.flutter.inspector.getRootWidgetSummaryTree","ext.flutter.inspector.getDetailsSubtree","ext.flutter.inspector.getSelectedRenderObject","ext.flutter.inspector.getSelectedWidget","ext.flutter.inspector.getSelectedSummaryWidget","ext.flutter.inspector.isWidgetCreationTracked","ext.flutter.inspector.screenshot","ext.dart.io.getOpenFiles","ext.dart.io.getFileByID","ext.dart.io.getOpenSockets","ext.dart.io.getSocketByID"]
[FlutterDriver]     at Object.wrappedLogger.errorAndThrow (/usr/local/lib/node_modules/appium-flutter-driver/node_modules/appium-support/lib/logging.js:74:35)
[FlutterDriver]     at Client.onOpenListener (/usr/local/lib/node_modules/appium-flutter-driver/lib/sessions/observatory.ts:91:17)
[FlutterDriver]     at runMicrotasks (<anonymous>)
[FlutterDriver]     at processTicksAndRejections (internal/process/task_queues.js:93:5)

[brolund]

TL;DR: Use capability 'fullReset': true to clear out artefacts from builds without enableFlutterDriverExtension();.

I had the same problem in Appium 2.0.0-beta.46, and first it worked and then it didn’t. It wasn’t intermittently failing, but rather it worked at first, and then stubbornly it didn’t.

I can reproduce the problem (and fix it) this way: Regular build = app without enableFlutterDriverExtension(); Test build = app with enableFlutterDriverExtension();

1. Deploy Regular build to device.
2. Run appium with Test build without capability 'fullReset': true -> “ext.flutter.driver” is not found in “extensionRPCs”
3. Run appium with Test build with capability 'fullReset': true -> Works as expected
4. Deploy Regular build to device.
5. Run appium with Test build without capability 'fullReset': true -> “ext.flutter.driver” is not found in “extensionRPCs”
6. Run appium with Test build with capability 'fullReset': true -> Works as expected

From this, I’d say there is a problem with cleaning out artefacts from previous deploys. I’m not sure this is the problem everyone is having, but there seems to be a pattern here worth investigating.

[KazuCocoa]

Note that flutter_driver package is needed for this driver instead of integration_test