flutter: Observatory server failed to start after 11 tries

[thavlik]

All of the examples fail to run with hot reload on Windows 10, x64:

PS C:\Users\tlhavlik\Repositories\go-flutter-examples\draggable_borderless> hover run
hover: Using engine from cache
go: finding github.com/go-gl/glfw latest
go: finding gopkg.in/check.v1 latest
hover: build finished, starting app...
flutter: Observatory server failed to start after 1 tries
go-flutter: no handler found for channel flutter/isolate
flutter: Observatory server failed to start after 2 tries
flutter: Observatory server failed to start after 3 tries
flutter: Observatory server failed to start after 4 tries
flutter: Observatory server failed to start after 5 tries
flutter: Observatory server failed to start after 6 tries
flutter: Observatory server failed to start after 7 tries
flutter: Observatory server failed to start after 8 tries
flutter: Observatory server failed to start after 9 tries
flutter: Observatory server failed to start after 10 tries
flutter: Observatory server failed to start after 11 tries
flutter: Could not start Observatory HTTP server:
SocketException: Failed to create server socket (OS Error: An attempt was made to access a socket in a way forbidden by its access permissions.
, errno = 10013), address = 127.0.0.1, port = 50300
#0      _NativeSocket.bind (dart:io-patch/socket_patch.dart:605:7)
<asynchronous suspension>
#1      _RawServerSocket.bind (dart:io-patch/socket_patch.dart:1220:26)
#2      _ServerSocket.bind (dart:io-patch/socket_patch.dart:1480:29)
#3      ServerSocket.bind (dart:io-patch/socket_patch.dart:1471:26)
#4      _HttpServer.bind (dart:_http/http_impl.dart:2578:25)
#5      HttpServer.bind (dart:_http:227:19)
#6      Server.startup.poll (dart:vmservice_io/server.dart:390:36)
<asynchronous suspension>
#7      Server.startup (dart:vmservice_io/server.dart:402:23)
<asynchronous suspension>
#8      main (dart:vmservice_io:257:12)

Cool project, by the way. Go is the clear choice for embedding. Kinda surprised google didn't push it.

[pchampio]

OS Error: An attempt was made to access a socket in a way forbidden by its access permissions.

Info: https://stackoverflow.com/questions/2778840/socket-error-errno-10013-an-attempt-was-made-to-access-a-socket-in-a-way-forb

Use the command on terminal: netstat -na|findstr 50300 to check if that port (50300) flutter is trying to bind to, is already in used by another service or process.

[pchampio]

This should be fixed once go-flutter-desktop/hover#12 is merged.

adding a new flag: hover run --observatory-port 12121 to change the Observatory server's port.