IDE hangs on startup: "discovery builtin:serial-discovery not found"

Development Tools IDE 2.x
1 
PS C:\Program Files\Arduino IDE> & '.\Arduino IDE.exe'
PS C:\Program Files\Arduino IDE>
Arduino IDE 2.2.1
Checking for frontend application configuration customizations. Module path: C:\Program Files\Arduino IDE\resources\app\lib\backend\electron-main.js, destination 'package.json': C:\Program Files\Arduino IDE\resources\app\package.json
Setting 'theia.frontend.config.appVersion' application configuration value to: "2.2.1" (type of string)
Setting 'theia.frontend.config.cliVersion' application configuration value to: "0.34.0" (type of string)
Setting 'theia.frontend.config.buildDate' application configuration value to: "2023-08-31T14:35:44.802Z" (type of string)
Frontend application configuration after modifications: {"applicationName":"Arduino IDE","defaultTheme":{"light":"arduino-theme","dark":"arduino-theme-dark"},"defaultIconTheme":"none","electron":{"windowOptions":{}},"defaultLocale":"","validatePreferencesSchema":false,"preferences":{"window.title":"${rootName}${activeEditorShort}${appName}","files.autoSave":"afterDelay","editor.minimap.enabled":false,"editor.tabSize":2,"editor.scrollBeyondLastLine":false,"editor.quickSuggestions":{"other":false,"comments":false,"strings":false},"editor.maxTokenizationLineLength":500,"editor.bracketPairColorization.enabled":false,"breadcrumbs.enabled":false,"workbench.tree.renderIndentGuides":"none","explorer.compactFolders":false},"appVersion":"2.2.1","cliVersion":"0.34.0","buildDate":"2023-08-31T14:35:44.802Z"}
Starting backend process. PID: 9164
Using browser-only version of superagent in non-browser environment
Configuration directory URI: 'file:///c%3A/Users/ADMIN/.arduinoIDE'
Configuring to accept webviews on '^.+\.webview\..+$' hostname.
2024-01-30T09:12:56.548Z root INFO Backend Object.initialize: 4.6 ms [Finished 0.492 s after backend start]
2024-01-30T09:12:56.548Z root INFO Backend Object.configure: 3.8 ms [Finished 0.492 s after backend start]
2024-01-30T09:12:56.549Z root INFO Backend a.onStart: 1.4 ms [Finished 0.492 s after backend start]
2024-01-30T09:12:56.549Z root INFO Backend a.configure: 0.3 ms [Finished 0.518 s after backend start]
2024-01-30T09:12:56.550Z root INFO Backend u.onStart: 0.3 ms [Finished 0.518 s after backend start]
2024-01-30T09:12:56.551Z root INFO Backend d.configure: 0.1 ms [Finished 0.518 s after backend start]
2024-01-30T09:12:56.552Z root INFO Backend d.initialize: 26.5 ms [Finished 0.519 s after backend start]
2024-01-30T09:12:56.552Z root INFO Backend c.onStart: 0.3 ms [Finished 0.519 s after backend start]
2024-01-30T09:12:56.553Z root INFO Backend s.configure: 1.5 ms [Finished 0.520 s after backend start]
2024-01-30T09:12:56.554Z config INFO >>> Initializing CLI configuration...
2024-01-30T09:12:56.555Z root INFO Backend c.initialize: 0.4 ms [Finished 0.520 s after backend start]
2024-01-30T09:12:56.555Z root INFO Backend P.onStart: 0.8 ms [Finished 0.521 s after backend start]
2024-01-30T09:12:56.556Z config INFO Loading CLI configuration from c:\Users\ADMIN\.arduinoIDE\arduino-cli.yaml...
2024-01-30T09:12:56.556Z daemon INFO Starting daemon from C:\Program Files\Arduino IDE\resources\app\lib\backend\resources\arduino-cli.exe...
2024-01-30T09:12:56.556Z root INFO Backend s.initialize: 0.4 ms [Finished 0.522 s after backend start]
2024-01-30T09:12:56.557Z root INFO Backend w.onStart: 1.1 ms [Finished 0.523 s after backend start]
2024-01-30T09:12:56.557Z root INFO Backend r.configure: 2.1 ms [Finished 0.523 s after backend start]
2024-01-30T09:12:56.557Z discovery-log INFO start
2024-01-30T09:12:56.557Z discovery-log INFO start new deferred
2024-01-30T09:12:56.557Z root INFO Backend d.initialize: 0.4 ms [Finished 0.524 s after backend start]
2024-01-30T09:12:56.557Z root INFO Backend y.onStart: 2.1 ms [Finished 0.526 s after backend start]
2024-01-30T09:12:56.557Z root INFO Backend r.configure: 1.9 ms [Finished 0.526 s after backend start]
2024-01-30T09:12:56.558Z root INFO Backend s.onStart: 0.5 ms [Finished 0.527 s after backend start]
2024-01-30T09:12:56.558Z root INFO Backend h.configure: 0.6 ms [Finished 0.528 s after backend start]
2024-01-30T09:12:56.558Z root INFO Backend a.configure: 0.5 ms [Finished 0.528 s after backend start]
2024-01-30T09:12:56.558Z root INFO Backend s.configure: 0.1 ms [Finished 0.529 s after backend start]
2024-01-30T09:12:56.558Z root INFO Backend l.configure: 0.1 ms [Finished 0.529 s after backend start]
2024-01-30T09:12:56.562Z root INFO Theia app listening on http://localhost:51339.
2024-01-30T09:12:56.562Z root INFO Finished starting backend application: 4.8 ms [Finished 0.533 s after backend start]
2024-01-30T09:12:56.568Z root WARN The local plugin referenced by local-dir:/c%3A/Users/ADMIN/.arduinoIDE/plugins does not exist.
2024-01-30T09:12:56.569Z root WARN The local plugin referenced by local-dir:/c%3A/Users/ADMIN/.arduinoIDE/extensions does not exist.
2024-01-30T09:12:56.569Z root WARN The local plugin referenced by local-dir:C:\Users\ADMIN\.arduinoIDE\plugins does not exist.
2024-01-30T09:12:56.593Z config INFO Loaded CLI configuration: {"board_manager":{"additional_urls":[]},"build_cache":{"compilations_before_purge":10,"ttl":"720h0m0s"},"daemon":{"port":"50051"},"directories":{"data":"C:\\Users\\ADMIN\\AppData\\Local\\Arduino15","downloads":"C:\\Users\\ADMIN\\AppData\\Local\\Arduino15\\staging","user":"C:\\Users\\ADMIN\\Documents\\Arduino"},"library":{"enable_unsafe_install":false},"logging":{"file":"","format":"text","level":"info"},"metrics":{"addr":":9090","enabled":true},"output":{"no_color":false},"sketch":{"always_export_binaries":false},"updater":{"enable_notification":true}}
2024-01-30T09:12:56.594Z config INFO 'directories.data' and 'directories.user' are set in the CLI configuration model.
2024-01-30T09:12:56.594Z config INFO Loaded the CLI configuration.
2024-01-30T09:12:56.595Z config INFO Mapped the CLI configuration: {"dataDirUri":"file:///c%3A/Users/ADMIN/AppData/Local/Arduino15","sketchDirUri":"file:///c%3A/Users/ADMIN/Documents/Arduino","additionalUrls":[],"network":"none","locale":"en"}
2024-01-30T09:12:56.596Z config INFO Validating the CLI configuration...
2024-01-30T09:12:56.597Z config INFO The CLI config is valid.
2024-01-30T09:12:56.597Z config INFO <<< Initialized the CLI configuration.
2024-01-30T09:12:56.618Z root INFO Resolve plugins list: 62.0 ms [Finished 0.588 s after backend start]
2024-01-30T09:12:56.656Z daemon INFO time="2024-01-30T14:42:56+05:30" level=info msg="Using config file: c:\\Users\\ADMIN\\.arduinoIDE\\arduino-cli.yaml"
time="2024-01-30T14:42:56+05:30" level=info msg="arduino-cli.exe version 0.34.0"
time="2024-01-30T14:42:56+05:30" level=info msg="Executing `arduino-cli daemon`"
Daemon is now listening on 127.0.0.1:51349
{"IP":"127.0.0.1","Port":"51349"}
2024-01-30T09:12:56.657Z daemon INFO Daemon is running.
2024-01-30T09:12:56.687Z daemon INFO time="2024-01-30T14:42:56+05:30" level=info msg="Updating libraries index"
2024-01-30T09:12:56.689Z daemon INFO time="2024-01-30T14:42:56+05:30" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
2024-01-30T09:12:56.754Z root ERROR Detected an error response during the gRPC core client initialization: code: 3, message: Error downloading index 'https://downloads.arduino.cc/libraries/library_index.tar.bz2': Get "https://downloads.arduino.cc/libraries/library_index.tar.bz2": dial tcp: lookup downloads.arduino.cc: no such host
2024-01-30T09:12:56.755Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Loading index file: loading json index file C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: The system cannot find the file specified.
2024-01-30T09:12:56.757Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Error loading hardware platform: discovery builtin:serial-discovery not found
2024-01-30T09:12:56.760Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Error loading hardware platform: discovery builtin:mdns-discovery not found
2024-01-30T09:12:56.761Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Loading index file: reading library_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
2024-01-30T09:12:56.764Z root ERROR The primary packages indexes are missing. Running indexes update before initializing the core gRPC client The index of the cores and libraries must be updated before initializing the core gRPC client.
The following problems were detected during the gRPC client initialization:
[platform-index] - code: 9, message: Loading index file: loading json index file C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: The system cannot find the file specified.
[platform-index] - code: 9, message: Error loading hardware platform: discovery builtin:serial-discovery not found
[platform-index] - code: 9, message: Error loading hardware platform: discovery builtin:mdns-discovery not found
[library-index] - code: 9, message: Loading index file: reading library_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.

2024-01-30T09:12:56.765Z daemon INFO time="2024-01-30T14:42:56+05:30" level=info msg="Loading hardware from: C:\\Users\\ADMIN\\AppData\\Local\\Arduino15\\packages"
time="2024-01-30T14:42:56+05:30" level=info msg="Loading libraries index file" index="C:\\Users\\ADMIN\\AppData\\Local\\Arduino15\\library_index.json"
time="2024-01-30T14:42:56+05:30" level=info msg="Adding libraries dir" dir="C:\\Users\\ADMIN\\AppData\\Local\\Arduino15\\libraries" location=ide
time="2024-01-30T14:42:56+05:30" level=info msg="Adding libraries dir" dir="C:\\Users\\ADMIN\\Documents\\Arduino\\libraries" location=user
2024-01-30T09:12:56.766Z daemon INFO time="2024-01-30T14:42:56+05:30" level=info msg="Updating libraries index"
time="2024-01-30T14:42:56+05:30" level=info msg="Updating index" url="https://downloads.arduino.cc/packages/package_index.tar.bz2"
2024-01-30T09:12:56.839Z daemon INFO time="2024-01-30T14:42:56+05:30" level=info msg="Starting download" url="https://downloads.arduino.cc/packages/package_index.tar.bz2"
time="2024-01-30T14:42:56+05:30" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
2024-01-30T09:12:56.840Z root INFO core-client-provider [platform-index] Downloading index: package_index.tar.bz2

2024-01-30T09:12:56.841Z root INFO core-client-provider [library-index] Downloading index: library_index.tar.bz2

2024-01-30T09:12:56.846Z root ERROR Failed to update platform, library indexes. Error: 13 INTERNAL: Some indexes could not be updated.
    at t.callErrorFromStatus (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:726940)
    at Object.onReceiveStatus (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:754480)
    at Object.onReceiveStatus (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:747504)
    at C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:833048
    at process.processTicksAndRejections (node:internal/process/task_queues:77:11)
for call at
    at a.makeServerStreamRequest (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:754247)
    at a.updateIndex (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:818456)
    at C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:587141
    at C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:587489
    at new Promise (<anonymous>)
    at _.doUpdateIndex (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:587468)
    at _.updatePlatformIndex (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:587113)
    at _.updateIndex (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:586481)
    at _.initInstanceWithFallback (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:584725)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
2024-01-30T09:12:56.847Z daemon INFO time="2024-01-30T14:42:56+05:30" level=info msg="Updating libraries index"
2024-01-30T09:12:56.912Z daemon INFO time="2024-01-30T14:42:56+05:30" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
time="2024-01-30T14:42:56+05:30" level=info msg="Loading hardware from: C:\\Users\\ADMIN\\AppData\\Local\\Arduino15\\packages"
time="2024-01-30T14:42:56+05:30" level=info msg="Loading libraries index file" index="C:\\Users\\ADMIN\\AppData\\Local\\Arduino15\\library_index.json"
time="2024-01-30T14:42:56+05:30" level=info msg="Adding libraries dir" dir="C:\\Users\\ADMIN\\AppData\\Local\\Arduino15\\libraries" location=ide
time="2024-01-30T14:42:56+05:30" level=info msg="Adding libraries dir" dir="C:\\Users\\ADMIN\\Documents\\Arduino\\libraries" location=user
2024-01-30T09:12:56.914Z root ERROR Detected an error response during the gRPC core client initialization: code: 3, message: Error downloading index 'https://downloads.arduino.cc/libraries/library_index.tar.bz2': Get "https://downloads.arduino.cc/libraries/library_index.tar.bz2": dial tcp: lookup downloads.arduino.cc: no such host
2024-01-30T09:12:56.916Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Loading index file: loading json index file C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: The system cannot find the file specified.
2024-01-30T09:12:56.920Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Error loading hardware platform: discovery builtin:serial-discovery not found
2024-01-30T09:12:56.921Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Error loading hardware platform: discovery builtin:mdns-discovery not found
2024-01-30T09:12:56.922Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Loading index file: reading library_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
2024-01-30T09:12:56.924Z root ERROR Uncaught Exception:  Error: The index of the cores and libraries must be updated before initializing the core gRPC client.
The following problems were detected during the gRPC client initialization:
[platform-index] - code: 9, message: Loading index file: loading json index file C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: The system cannot find the file specified.
[platform-index] - code: 9, message: Error loading hardware platform: discovery builtin:serial-discovery not found
[platform-index] - code: 9, message: Error loading hardware platform: discovery builtin:mdns-discovery not found
[library-index] - code: 9, message: Loading index file: reading library_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.

2024-01-30T09:12:56.928Z root ERROR Error: The index of the cores and libraries must be updated before initializing the core gRPC client.
The following problems were detected during the gRPC client initialization:
[platform-index] - code: 9, message: Loading index file: loading json index file C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\package_index.json: The system cannot find the file specified.
[platform-index] - code: 9, message: Error loading hardware platform: discovery builtin:serial-discovery not found
[platform-index] - code: 9, message: Error loading hardware platform: discovery builtin:mdns-discovery not found
[library-index] - code: 9, message: Loading index file: reading library_index.json: open C:\Users\ADMIN\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.

    at C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:586285
    at _.evaluateErrorStatus (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:586301)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async s.<anonymous> (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:585971)
2024-01-30T09:12:57.706Z root INFO Deploy plugins list: 62.0 ms [Finished 1.677 s after backend start]
Opening channel for service path '/services/electron-window'.
Opening channel for service path '/services/ide-updater'.
2024-01-30T09:12:58.546Z root WARN Frontend a.configure took longer than the expected maximum 100 milliseconds: 393.7 ms [Finished 1.902 s after frontend start]
2024-01-30T09:12:58.554Z root WARN A command editor.action.toggleStickyScroll is already registered.
2

Hi @juitmunmun. I see the problem here:

On the first run after a fresh installation, Arduino IDE downloads some additional essential components from the Internet and installs them. If it can't install those components then the startup fails. So the computer must have access to the Internet on the first startup.

The errors indicate Arduino IDE is not able to access the Internet. If it is not already, please connect your computer to the Internet, close the Arduino IDE window, then start Arduino IDE again. This time it should start up successfully.

After that first run, an Internet connection is not required. However, there are some supplemental features such as "Library Manager" that have an inherent dependency on the Internet. Those features will not be usable while your computer is offline. But the essential functionality of editing, compiling, and uploading sketches will be available even without an Internet connection.

3

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