Language Support stops working

[svenefftinge]

Opening an .ino file and then doing some edits like e.g. adding the following line:

const char* string = "foo%test";

eventually results in:
`jsonrpc2: connection is closed``
after which nothing works anymore.

Workaround: Run View: Reset Workbench Layout.

Desktop (please complete the following information):

• OS: OSX
• Version v0.0.3

[jankeromnes]

I wasn't able to reproduce this when I tried, but after a while this just happened to me randomly (browser app).

I simply selected board "Arduino Zero", then installed the core, then selected board "Arduino Zero (programming port)", then tried building the sketch.

The jsonrpc2: connection is closed message started appearing in the logs.

(view full logs)

$ theia start
root INFO Theia app listening on http://localhost:3000.
daemon INFO >>> Starting arduino-cli version: 0.6.0 commit: 2049a7a daemon from /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli...
daemon INFO Checking for config file in: /home/gitpod/.arduino15/arduino-cli.yaml
daemon INFO Checking if CLI is Bundled into the IDE
daemon INFO Candidate IDE Directory: /workspace/arduino-editor/arduino-ide-extension/build
daemon INFO CLI is not bundled into the IDE
daemon INFO Checking for config in: /arduino-cli.yaml
daemon INFO error loading [error: open /arduino-cli.yaml: no such file or directory]
daemon INFO Checking for config in: /workspace/arduino-cli.yaml
daemon INFO error loading [error: open /workspace/arduino-cli.yaml: no such file or directory]
daemon INFO Checking for config in: /workspace/arduino-editor/arduino-cli.yaml
daemon INFO error loading [error: open /workspace/arduino-editor/arduino-cli.yaml: no such file or directory]
daemon INFO Checking for config in: /workspace/arduino-editor/browser-app/arduino-cli.yaml
daemon INFO error loading [error: open /workspace/arduino-editor/browser-app/arduino-cli.yaml: no such file or directory]
daemon INFO Configuration set
daemon INFO arduino-cli-0.6.0
daemon INFO Starting root command preparation (`arduino`)
daemon INFO Formatter set
daemon INFO <<< The 'arduino-cli' daemon is up an running.
root INFO Using Git [2.20.1] from the PATH. (/usr/bin/git)
root INFO Starting language server /workspace/arduino-editor/arduino-ide-extension/build/arduino-language-server -clangd /usr/bin/clangd -cli /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli
root INFO [nsfw-watcher: 5407] Started watching: /home/gitpod/.theia
root INFO [nsfw-watcher: 5407] Started watching: /home/gitpod/Arduino/sketch_december11a
Started watching: /home/gitpod/Arduino/sketch_december11b
Started watching: /home/gitpod/Arduino/sketch_december11a
Started watching: /home/gitpod/Arduino/sketch_december11b
Started watching: /home/gitpod/Arduino/sketch_december11a/sketch_december11a.ino
root ERROR Arduino: 2019/12/11 12:33:37 Command error: /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli exit status 1
2019/12/11 12:33:37 ------------------------------BEGIN STDERR
 Error during build: platform not installed
 ------------------------------END STDERR

root INFO  >>> Creating and caching a new client for file:///home/gitpod/Arduino/sketch_december11a...
daemon INFO Checking if CLI is Bundled into the IDE
daemon INFO Candidate IDE Directory: /workspace/arduino-editor/arduino-ide-extension/build
daemon INFO Loading hardware from: /home/gitpod/.arduino15/packages
daemon INFO Loading package builtin from: /home/gitpod/.arduino15/packages/builtin
daemon INFO Checking existence of 'tools' path: /home/gitpod/.arduino15/packages/builtin/tools
daemon INFO Loading tools from dir: /home/gitpod/.arduino15/packages/builtin/tools
daemon INFO Loaded tool [tool: Version: 5.8-arduino11]
daemon INFO Loaded tool [tool: Version: 1.0.0]
daemon INFO Adding libraries dir [dir: /home/gitpod/Arduino/libraries, location: sketchbook]
daemon INFO instance:<id:1 >
daemon INFO Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
daemon INFO Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
daemon INFO Loading hardware from: /home/gitpod/.arduino15/packages
daemon INFO Loading package builtin from: /home/gitpod/.arduino15/packages/builtin
daemon INFO Checking existence of 'tools' path: /home/gitpod/.arduino15/packages/builtin/tools
daemon INFO Loading tools from dir: /home/gitpod/.arduino15/packages/builtin/tools
daemon INFO Loaded tool [tool: Version: 5.8-arduino11]
daemon INFO Loaded tool [tool: Version: 1.0.0]
daemon INFO Adding libraries dir [dir: /home/gitpod/Arduino/libraries, location: sketchbook]
daemon INFO Updating libraries index
daemon INFO Loading hardware from: /home/gitpod/.arduino15/packages
daemon INFO Loading package builtin from: /home/gitpod/.arduino15/packages/builtin
daemon INFO Checking existence of 'tools' path: /home/gitpod/.arduino15/packages/builtin/tools
daemon INFO Loading tools from dir: /home/gitpod/.arduino15/packages/builtin/tools
daemon INFO Loaded tool [tool: Version: 5.8-arduino11]
daemon INFO Loaded tool [tool: Version: 1.0.0]
daemon INFO Adding libraries dir [dir: /home/gitpod/Arduino/libraries, location: sketchbook]
root INFO  <<< New client has been successfully created and cached for file:///home/gitpod/Arduino/sketch_december11a.
discovery INFO Initialized attached boards and available ports. - Discovered boards: [] and available ports: []
root INFO Attached boards and available ports changed:  {"oldState":{"boards":[],"ports":[]},"newState":{"boards":[],"ports":[]}}
root INFO Board config changed:  {"selectedBoard":{"name":"Arduino Zero","fqbn":"","packageName":"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}}
root INFO Starting language server /workspace/arduino-editor/arduino-ide-extension/build/arduino-language-server -clangd /usr/bin/clangd -cli /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli -board-name "Arduino Zero"
root ERROR Arduino: 2019/12/11 12:34:01 Command error: /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli exit status 1
2019/12/11 12:34:01 ------------------------------BEGIN STDERR
 Error during build: platform not installed
 ------------------------------END STDERR

root INFO Starting board installation { id: 'arduino:samd',
  name: 'Arduino SAMD Boards (32-bits ARM Cortex-M0+)',
  author: 'Arduino',
  availableVersions:
   [ '1.8.4',
     '1.8.3',
     '1.8.2',
     '1.8.1',
     '1.6.21',
     '1.6.20',
     '1.6.19',
     '1.6.18',
     '1.6.17',
     '1.6.16',
     '1.6.15',
     '1.6.14',
     '1.6.13',
     '1.6.12',
     '1.6.11',
     '1.6.10',
     '1.6.9',
     '1.6.8',
     '1.6.7',
     '1.6.6',
     '1.6.5',
     '1.6.4',
     '1.6.3',
     '1.6.2',
     '1.6.1',
     '1.6.0' ],
  description: 'Arduino Zero',
  installable: true,
  summary: 'Boards included in this package:',
  boards: [ { name: 'Arduino Zero', fqbn: '' } ],
  moreInfoLink: 'http://www.arduino.cc/' }
daemon INFO Installing tool [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
daemon INFO Tool installed [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
daemon INFO Installing tool [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO Tool installed [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO Installing tool [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
daemon INFO Tool installed [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
daemon INFO Installing tool [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO Tool installed [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO Installing tool [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO Tool installed [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO Installing tool [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
daemon INFO Tool installed [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
daemon INFO Installing platform [platform: {ID:"arduino:samd",Installed:"1.8.4",Latest:"1.8.4",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
daemon INFO Platform installed [platform: {ID:"arduino:samd",Installed:"1.8.4",Latest:"1.8.4",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
daemon INFO Loading hardware from: /home/gitpod/.arduino15/packages
daemon INFO Loading package arduino from: /home/gitpod/.arduino15/packages/arduino/hardware
daemon INFO Loaded platform [platform: {ID:"arduino:samd",Installed:"1.8.4",Latest:"1.8.4",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
daemon INFO Checking existence of 'tools' path: /home/gitpod/.arduino15/packages/arduino/tools
daemon INFO Loading tools from dir: /home/gitpod/.arduino15/packages/arduino/tools
daemon INFO Loaded tool [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO Loaded tool [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
daemon INFO Loaded tool [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
daemon INFO Loaded tool [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
daemon INFO Loaded tool [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
daemon INFO Loaded tool [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
daemon INFO Loading package builtin from: /home/gitpod/.arduino15/packages/builtin
daemon INFO Checking existence of 'tools' path: /home/gitpod/.arduino15/packages/builtin/tools
daemon INFO Loading tools from dir: /home/gitpod/.arduino15/packages/builtin/tools
daemon INFO Loaded tool [tool: Version: 5.8-arduino11]
daemon INFO Loaded tool [tool: Version: 1.0.0]
daemon INFO Adding libraries dir [dir: /home/gitpod/Arduino/libraries, location: sketchbook]
daemon INFO Adding libraries dir [dir: /home/gitpod/.arduino15/packages/arduino/hardware/samd/1.8.4/libraries, location: platform]
root INFO Board installation done { id: 'arduino:samd',
  name: 'Arduino SAMD Boards (32-bits ARM Cortex-M0+)',
  author: 'Arduino',
  availableVersions:
   [ '1.8.4',
     '1.8.3',
     '1.8.2',
     '1.8.1',
     '1.6.21',
     '1.6.20',
     '1.6.19',
     '1.6.18',
     '1.6.17',
     '1.6.16',
     '1.6.15',
     '1.6.14',
     '1.6.13',
     '1.6.12',
     '1.6.11',
     '1.6.10',
     '1.6.9',
     '1.6.8',
     '1.6.7',
     '1.6.6',
     '1.6.5',
     '1.6.4',
     '1.6.3',
     '1.6.2',
     '1.6.1',
     '1.6.0' ],
  description: 'Arduino Zero',
  installable: true,
  summary: 'Boards included in this package:',
  boards: [ { name: 'Arduino Zero', fqbn: '' } ],
  moreInfoLink: 'http://www.arduino.cc/' }
root INFO Board installed:  {"pkg":{"id":"arduino:samd","name":"Arduino SAMD Boards (32-bits ARM Cortex-M0+)","author":"Arduino","availableVersions":["1.8.4","1.8.3","1.8.2","1.8.1","1.6.21","1.6.20","1.6.19","1.6.18","1.6.17","1.6.16","1.6.15","1.6.14","1.6.13","1.6.12","1.6.11","1.6.10","1.6.9","1.6.8","1.6.7","1.6.6","1.6.5","1.6.4","1.6.3","1.6.2","1.6.1","1.6.0"],"description":"Arduino Zero","installable":true,"summary":"Boards included in this package:","boards":[{"name":"Arduino Zero","fqbn":""}],"moreInfoLink":"http://www.arduino.cc/"}}
root INFO Starting language server /workspace/arduino-editor/arduino-ide-extension/build/arduino-language-server -clangd /usr/bin/clangd -cli /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli -board-name "Arduino Zero"
root ERROR Arduino: 2019/12/11 12:34:49 Command error: /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli exit status 1
2019/12/11 12:34:49 ------------------------------BEGIN STDERR
 Error during build: platform not installed
 ------------------------------END STDERR

root INFO Board config changed:  {"selectedBoard":{"name":"Arduino Zero (Programming Port)","fqbn":"arduino:samd:arduino_zero_edbg","packageName":"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}}
root INFO Starting language server /workspace/arduino-editor/arduino-ide-extension/build/arduino-language-server -clangd /usr/bin/clangd -cli /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli -fqbn arduino:samd:arduino_zero_edbg -board-name "Arduino Zero (Programming Port)"
root INFO compile { uri:
   'file:///home/gitpod/Arduino/sketch_december11a/sketch_december11a.ino',
  board:
   { name: 'Arduino Zero (Programming Port)',
     fqbn: 'arduino:samd:arduino_zero_edbg',
     packageName: 'Arduino SAMD Boards (32-bits ARM Cortex-M0+)' } }
daemon INFO Searching tools required for board arduino:samd:arduino_zero_edbg
daemon INFO Required tool [tool: {ToolName:"CMSIS",ToolVersion:"4.5.0",ToolPackager:"arduino"}]
daemon INFO Required tool [tool: {ToolName:"CMSIS-Atmel",ToolVersion:"1.2.0",ToolPackager:"arduino"}]
daemon INFO Required tool [tool: {ToolName:"arduinoOTA",ToolVersion:"1.2.1",ToolPackager:"arduino"}]
daemon INFO Required tool [tool: {ToolName:"arm-none-eabi-gcc",ToolVersion:"7-2017q4",ToolPackager:"arduino"}]
daemon INFO Required tool [tool: {ToolName:"bossac",ToolVersion:"1.7.0-arduino3",ToolPackager:"arduino"}]
daemon INFO Required tool [tool: {ToolName:"openocd",ToolVersion:"0.10.0-arduino7",ToolPackager:"arduino"}]
daemon INFO Adding libraries dir [dir: /home/gitpod/.arduino15/packages/arduino/hardware/samd/1.8.4/libraries, location: platform]
daemon INFO Adding libraries dir [dir: /home/gitpod/Arduino/libraries, location: sketchbook]
root ERROR Arduino: 2019/12/11 12:35:19 jsonrpc2 handler: notification "textDocument/didChange" handling error: jsonrpc2: connection is closed

root ERROR Arduino: 2019/12/11 12:35:20 jsonrpc2 handler: notification "textDocument/didSave" handling error: jsonrpc2: connection is closed

root ERROR Arduino: 2019/12/11 12:35:20 jsonrpc2 handler: notification "textDocument/didChange" handling error: jsonrpc2: connection is closed

root ERROR Arduino: 2019/12/11 12:35:20 jsonrpc2 handler: notification "workspace/didChangeWatchedFiles" handling error: jsonrpc2: connection is closed

root ERROR Arduino: 2019/12/11 12:35:20 jsonrpc2 handler: notification "workspace/didChangeWatchedFiles" handling error: jsonrpc2: connection is closed

root ERROR Arduino: 2019/12/11 12:35:21 jsonrpc2 handler: notification "textDocument/didSave" handling error: jsonrpc2: connection is closed

root ERROR Arduino: 2019/12/11 12:35:21 jsonrpc2 handler: notification "workspace/didChangeWatchedFiles" handling error: jsonrpc2: connection is closed

root ERROR Arduino: 2019/12/11 12:35:21 jsonrpc2 handler: notification "workspace/didChangeWatchedFiles" handling error: jsonrpc2: connection is closed

root ERROR Arduino: 2019/12/11 12:35:22 jsonrpc2 handler: notification "textDocument/didChange" handling error: jsonrpc2: connection is closed

This is what the process tree now looks like (notice the clangd zombie):

    869    5263    5263     869 pts/0       5263 Sl+  33333   0:00  |   \_ node /home/gitpod/.nvm/versions/node/v10.16.3/bin/yarn --cwd ./browser-app start
   5263    5285    5263     869 pts/0       5263 S+   33333   0:00  |       \_ /bin/sh -c theia start
   5285    5290    5263     869 pts/0       5263 Sl+  33333   0:00  |           \_ /home/gitpod/.nvm/versions/node/v10.16.3/bin/node /workspace/arduino-editor/browser-app/node_modules/.bin/theia start
   5290    5297    5263     869 pts/0       5263 Sl+  33333   0:03  |               \_ /home/gitpod/.nvm/versions/node/v10.16.3/bin/node /workspace/arduino-editor/browser-app/src-gen/backend/main.js
   5297    5329    5263     869 pts/0       5263 S+   33333   0:00  |                   \_ /bin/sh -c "/workspace/arduino-editor/arduino-ide-extension/build/arduino-cli" daemon -v --log-level info --format json --log-format json
   5329    5330    5263     869 pts/0       5263 Sl+  33333   0:46  |                   |   \_ /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli daemon -v --log-level info --format json --log-format json
   5297    5335    5335    5335 ?             -1 Ssl  33333   0:00  |                   \_ /home/gitpod/.nvm/versions/node/v10.16.3/bin/node /workspace/arduino-editor/arduino-ide-extension/lib/node/daemon-watcher.js 5297 5329
   5297    5407    5263     869 pts/0       5263 Sl+  33333   0:00  |                   \_ /home/gitpod/.nvm/versions/node/v10.16.3/bin/node /workspace/arduino-editor/node_modules/@theia/core/lib/node/messaging/ipc-bootstrap.js
   5297    6066    5263     869 pts/0       5263 Sl+  33333   0:00  |                   \_ /workspace/arduino-editor/arduino-ide-extension/build/arduino-language-server -clangd /usr/bin/clangd -cli /workspace/arduino-editor/arduino-ide-extension/build/arduino-cli -fqbn arduino:samd:arduino_zero_edbg -board-name "Arduino Zero (Programming Port)"
   6066    6071    5263     869 pts/0       5263 Z+   33333   0:00  |                       \_ [clangd.main] <defunct>

EDIT: Unfortunately, I wasn't logging the clangd output, so we can't know what happened exactly. However, maybe we should have a sort of keep-alive mechanism to restart clangd if it ever crashes?

[jankeromnes]

Oh, it sounds like Theia is already supposed to auto-restart clangd: eclipse-theia/theia#6308

Could this possibly be the same bug?

[ubidefeo]

This should now be working in the new 0.1.4 release of Arduino Pro IDE since we have reworked the LS entirely
This issue will be closed