Sencha Architect won’t start / Sencha Themer won't build

Posted on in Questions

A weird error happened in my Sencha Themer. I wasn't able to start the Themer, because I couldn't make a Sencha build. This problem with Sencha Cmd probably actually also affected my Sencha Test, who couldn't create builds either.

No available port starting at 1,842

The error shown in the logs was:

The following error occurred while executing this line: Error: 
BUILD FAILED
com.sencha.exceptions.ExNotFound: No available port starting at 8,902

Total time: 1 second
The following error occurred while executing this line:
    at SenchaCmdError (/Applications/Sencha/Themer/Sencha Themer.app/Contents/Resources/app.asar/app/errors/SenchaCmdError.js:5:9)
    at SenchaCmd._closeHandler (/Applications/Sencha/Themer/Sencha Themer.app/Contents/Resources/app.asar/app/lib/SenchaCmd.js:192:32)
    at ChildProcess.g (events.js:286:16)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:850:16)
    at Socket. (internal/child_process.js:323:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at Pipe._handle.close [as _onclose] (net.js:492:12)

This problem even infected my Sencha Architect. With the release of 3.5.1 (which probably makes use of a newer Cmd version, and needs to make builds too), I wasn't able to start Sencha Architect. - My software would just freeze, and nothing would start or happen.

After a lot of pain and headaches, we figured out how to solve the issue.

We used this script, to make some tests with better logging:

The real problem was that Sencha Cmd was unable to bind to localhost.

What's causing these problems was my hosts file: /etc/hosts/
My local XAMPP server, modified the hosts file, and set 255.255.255.255 to localhost, but it should be broadcasthost:

After editing my hosts file by running:
sudo nano /etc/hosts
and restarting my networking.
I suddenly could run the test script, and Sencha Themer and Sencha Architect 3.5.1.

Wow!

A ticket to fix this in the future for other customers, will fix this as well:
https://github.com/sencha/cmd/pull/496