During the upgrade the following url is fetched: https://fonts.googleapis.com/css?family=Roboto:300,400,500,700

I was getting a 501 http error..
It was caused by the proxy, and solved by bypassing it.

The upgrade completed successfully.

Hi,

I try to upgrade a nodebb instance from some 1.2.x version to the latest (1.4.2 I think)

When I launch the upgrade it proceeds smoothly until the javascript building part.

./nodebb upgrade
[..]
16/1 12:19:43 [18045] - info: [upgrade] Schema update complete!
16/1 12:19:43 [18045] - info: [build] Building javascript
16/1 12:19:43 [18045] - info: [build] Building client-side CSS
16/1 12:19:57 [18045] - info: [build] js => Completed in 14.563s

At this point the scripts hangs indefinitely, using no CPU time...
The upgrade can be aborted using ctrl-c, the resulting installation is unusable.

nodejs is version 4.7.2 from the nodesource distribution, on a Centos 6 server.

Well let's say I given "the most probable explanation if the context isn't properly taken into account"

@frissdiegurke

Most probably the file is still used by some process. Space will be freed if you kill the process.

Alternatively you may look for the file descriptor in /proc/<process_pid>/fd/ ie:

ls -l /proc/*/fd/*|grep filename

then truncate the file

echo -n > /proc/<process_pid>/fd/<fd_number>