Livesync hangs, especially bad on iOS

[vcooley]

I'm having multiple issues with livesync, expecially on iOS. I am unsure if they are related, but I will outline what is happening below.

Which platform(s) does your issue occur on?

Both

Please provide the following version numbers that your issue occurs with:

• CLI: 3.3.1
• Cross-platform modules: 3.3.0
• Runtime(s): tns-android: 3.3.1 tns-ios: 3.3.0
• Plugin(s):

{
    "nativescript-advanced-webview": "^1.1.3",
    "nativescript-angular": "~4.4.1",
    "nativescript-async": "^1.0.2",
    "nativescript-drop-down": "^3.1.0",
    "nativescript-floatingactionbutton": "^3.0.0",
    "nativescript-geolocation": "^3.0.0",
    "nativescript-gradient": "^2.0.1",
    "nativescript-iqkeyboardmanager": "^1.1.0",
    "nativescript-ng-shadow": "^1.1.2",
    "nativescript-plugin-firebase": "^4.0.6",
    "nativescript-pro-ui": "^3.1.3",
    "nativescript-snackbar": "^2.0.0",
    "nativescript-theme-core": "^1.0.4",
    "nativescript-unit-test-runner": "^0.3.4"
}

Please tell us how to recreate the issue in as much detail as possible.

When I tns run ios, my app will begin to build and then hang. Building a clean build seems to temporarily fix it, but eventually it happens again, often in the middle of my day when I haven't made any changes to dependencies or anything like that. I have also noticed that when it is hanging I can suspend the app by pressing the home button and it will proceed. I've seen mentioned to run with the --log trace output and I will paste the content below.

Loading extensions.
Asserting extension nativescript-angular-cli is installed.
Extension nativescript-angular-cli is installed.
execFile: /Users/vincecooley/Library/Android/sdk/platform-tools/adb "help"
Exec uname -a 
 stdout: Darwin Vinces-MacBook-Pro.local 17.2.0 Darwin Kernel Version 17.2.0: Fri Sep 29 18:27:05 PDT 2017; root:xnu-4570.20.62~3/RELEASE_X86_64 x86_64
 
 stderr: 
Exec npm -v 
 stdout: 4.2.0
 
 stderr: 
spawn: java "-version"
Exec node-gyp -v 
 stdout:  
 stderr: /bin/sh: node-gyp: command not found

Error while executing node-gyp -v: Command failed: node-gyp -v
/bin/sh: node-gyp: command not found

Exec xcodebuild -version 
 stdout: Xcode 9.0.1
Build version 9A1004
 
 stderr: 
Exec gem which xcodeproj 
 stdout: /usr/local/lib/ruby/gems/2.4.0/gems/xcodeproj-1.4.2/lib/xcodeproj.rb
 
 stderr: 
Exec pod --version 
 stdout: 1.2.0
 
 stderr: 
Exec '/Users/vincecooley/Library/Android/sdk/platform-tools/adb' version 
 stdout: Android Debug Bridge version 1.0.39
Revision 3db08f2c6889-android
Installed as /Users/vincecooley/Library/Android/sdk/platform-tools/adb

- stderr: 
Exec mono --version 
 stdout:  
 stderr: /bin/sh: mono: command not found

Error while executing mono --version: Command failed: mono --version
/bin/sh: mono: command not found

Exec git --version 
 stdout: git version 2.13.5 (Apple Git-94)
 
 stderr: 
Exec gradle -v 
 stdout:  
 stderr: /bin/sh: gradle: command not found

Error while executing gradle -v: Command failed: gradle -v
/bin/sh: gradle: command not found

Exec "/Library/Java/Home/bin/javac" -version 
 stdout:  
 stderr: javac 1.8.0_121

System information:
{ procInfo: 'nativescript/3.3.1',
  platform: 'darwin',
  os: 'Darwin Vinces-MacBook-Pro.local 17.2.0 Darwin Kernel Version 17.2.0: Fri Sep 29 18:27:05 PDT 2017; root:xnu-4570.20.62~3/RELEASE_X86_64 x86_64\n',
  shell: '/bin/bash',
  dotNetVer: null,
  procArch: 'x64',
  nodeVer: 'v7.9.0',
  npmVer: '4.2.0',
  javaVer: '1.8.0',
  nodeGypVer: null,
  xcodeVer: 'Xcode 9.0.1\nBuild version 9A1004\n',
  xcodeprojGemLocation: '/usr/local/lib/ruby/gems/2.4.0/gems/xcodeproj-1.4.2/lib/xcodeproj.rb\n',
  itunesInstalled: true,
  cocoapodVer: '1.2.0',
  adbVer: 'Android Debug Bridge version 1.0.39',
  emulatorInstalled: true,
  monoVer: null,
  gitVer: '2.13.5 (Apple Git-94)',
  gradleVer: null,
  javacVersion: '1.8.0_121' }
Looking for project in '/Users/vincecooley/Projects/myproject'
Project directory is '/Users/vincecooley/Projects/myproject'.
Exec which xcodebuild 
 stdout: /usr/bin/xcodebuild
 
 stderr: 
Exec xcodebuild -version | head -n 1 | sed -e 's/Xcode //' 
 stdout: 9.0.1
 
 stderr: 
Validate options for platform: iOS
Initializing analytics statuses.
Analytics statuses:  { TrackFeatureUsage: 'enabled', TrackExceptions: 'enabled' }
spawn: node "/usr/local/lib/node_modules/nativescript/lib/services/analytics/analytics-broker-process.js" "/usr/local/lib/node_modules/nativescript/lib/bootstrap.js"
Searching for devices...
startLookingForDevices; platform is iOS
Starting to look for iOS devices.
Exec ps cax | grep launchd_sim 
 stdout: 23462   ??  S      0:03.01 launchd_sim
 
 stderr: 
Found device with identifier 'BE9FC449-B049-4FF8-967F-23506BE243A7'
startLookingForDevices; platform is iOS
Exec ps cax | grep launchd_sim 
 stdout: 23462   ??  S      0:03.01 launchd_sim
 
 stderr: 
Exec ps cax | grep launchd_sim 
 stdout: 23462   ??  S      0:03.01 launchd_sim
 
 stderr: 
Project dir from hooksArgs is: /Users/vincecooley/Projects/myproject.
Hooks directories: [ '/usr/local/lib/node_modules/nativescript/lib/hooks',
  '/usr/local/lib/node_modules/nativescript/lib/common/hooks',
  '/Users/vincecooley/Projects/myproject/hooks' ]
BeforeHookName for command liveSync is before-liveSync
Executing before-liveSync hook from /Users/vincecooley/Projects/myproject/hooks/before-liveSync/nativescript-angular-sync.js
Executing before-liveSync hook at location /Users/vincecooley/Projects/myproject/hooks/before-liveSync/nativescript-angular-sync.js in-process
Validating before-liveSync arguments.
Changes info in prepare platform: ProjectChangesInfo {
  appFilesChanged: false,
  packageChanged: false,
  appResourcesChanged: false,
  nativeChanged: false,
  configChanged: false,
  nativePlatformStatus: '3' }
Skipping prepare.
Will send the following information to Google Analytics: { googleAnalyticsDataType: 'event',
  action: 'LiveSync',
  label: 'iOS_Simulator_11.0',
  customDimensions: { cd2: 'Angular' } }

At this point, I get a hang and can manually suspend the app to resume. I'd also like to note that if I kill it here I get the following message:

^CUnable to apply changes on device: BE9FC449-B049-4FF8-967F-23506BE243A7. Error is: process.send is not a function.
Project dir from hooksArgs is: /Users/vincecooley/Projects/myproject.
Hooks directories: [ '/usr/local/lib/node_modules/nativescript/lib/hooks',
  '/usr/local/lib/node_modules/nativescript/lib/common/hooks',
  '/Users/vincecooley/Projects/myproject/hooks' ]
AfterHookName for command watch is after-watch
Executing after-watch hook from /Users/vincecooley/Projects/myproject/hooks/after-watch/nativescript-dev-typescript.js
Executing after-watch hook at location /Users/vincecooley/Projects/myproject/hooks/after-watch/nativescript-dev-typescript.js in-process
Validating after-watch arguments.
Project dir from hooksArgs is: /Users/vincecooley/Projects/myproject.
Hooks directories: [ '/usr/local/lib/node_modules/nativescript/lib/hooks',
  '/usr/local/lib/node_modules/nativescript/lib/common/hooks',
  '/Users/vincecooley/Projects/myproject/hooks' ]
AfterHookName for command liveSync is after-liveSync
IOSDeviceOperations disposed.

Finally, I'm not sure if this is related or not, but I get many incremental compilation messages when I have made no changes. The app does not refresh after receiving these until I have actually made some changes. For example:

9:31:38 AM - File change detected. Starting incremental compilation...

9:31:39 AM - Compilation complete. Watching for file changes.

9:31:44 AM - File change detected. Starting incremental compilation...

9:31:45 AM - Compilation complete. Watching for file changes.

9:31:45 AM - File change detected. Starting incremental compilation...

9:31:46 AM - Compilation complete. Watching for file changes.

etc...

[chauhan-saurabh]

same issue

[NickIliev]

Hey, @vcooley @chauhan-saurabh can you guys test the run command (livesync) with iOS 10 (instead of iOS 11) - we are currently investigating this issue and on our side, it seems related to the latest iOS version.

Please do let me know if you are experiencing the same trouble when using iOS 10 emulators

[vcooley]

I'm still getting the same problem, though so far I have not had multiple incremental compilation messages when I have made no changes.

What I am experiencing is the livesync working after multiple changes and multiple saves. So far it has required me to make two changes for the app to refresh. Here's an example of the output where I saved a change, waited ~30 seconds and saved another change.

10:07:12 AM - File change detected. Starting incremental compilation...



10:07:12 AM - Compilation complete. Watching for file changes.



10:07:46 AM - File change detected. Starting incremental compilation...



10:07:46 AM - Compilation complete. Watching for file changes.



Executing before-prepare hook from /Users/vincecooley/Projects/myproject/hooks/before-prepare/nativescript-dev-typescript.js
Executing before-prepare hook from /Users/vincecooley/Projects/myproject/hooks/before-prepare/nativescript-plugin-firebase.js
Preparing project...
Project successfully prepared (iOS)
Executing after-prepare hook from /Users/vincecooley/Projects/myproject/hooks/after-prepare/firebase-build-gradle.js
Configure firebase
Executing after-prepare hook from /Users/vincecooley/Projects/myproject/hooks/after-prepare/firebase-copy-google-services.js
Executing after-prepare hook from /Users/vincecooley/Projects/myproject/hooks/after-prepare/nativescript-plugin-firebase.js
Executing after-prepare hook from /Users/vincecooley/Projects/myproject/hooks/after-prepare/nativescript-unit-test-runner.js
Successfully transferred payment.service.js.
Successfully transferred payment.service.ts.
Successfully transferred payment.service.ts.
Successfully transferred payment.service.js.
Refreshing application...

EDIT:
I would like to also add that I'm now noticing the same files being transferred more than once when changes to other files are made.

I added a component to my angular application and am seeing my app module and routing file (both of which I modified recently) being transferred multiple times when I make and save changes to other files.

[dtopuzov]

I was able to reproduce similar issue only on iOS11 simulator with following steps:

• Create brand new JS project and open it with VSCode
• Create new folder and text file inside
• Copy the folder
  => Livesync process do not exit, but all changes after operations above are not applied on the simulator.

[chauhan-saurabh]

Hey @NickIliev yes tns run ios (livesync) work fines on iOS 10

[dtopuzov]

Hack for iOS11 issue:
After clicking on the home button of the simulator (to mimimize the app) changes are synced.

[thaoula]

Hi @dtopuzov,

Any timeline for fixing this ... pretty much have to kill IOS livesync every one or two changes.

Regards,
Tarek

[rosen-vladimirov]

Hey @thaoula,
Can you please send us your steps to reproduce, so we can take a look at all cases. Also it will be a great help in case you can send us your package.json file, so we can use the same dependencies and devDependencies while investigating the issue.