Locking issues #1015
Description
With my current version of nix, I observe the following behaviour after some calls to nix.
The command hangs forever.
$ nix-build ...
these derivations will be built:
/nix/store/<hash>-<name>.drv
waiting for locks or build slots...
This occurs after cancelling some other builds through the daemon.
When I cancel a user nix-build (or nix-env) command, it shows me an error: interrupted by the user.
This error also appears in the logs of the nix-daemon:
aoû 07 23:05:58 ankh-morpork systemd[1]: Started Nix Daemon.
aoû 07 23:05:58 ankh-morpork nix-daemon[2971]: accepted connection from pid 2970, user layus
aoû 07 23:06:41 ankh-morpork nix-daemon[2971]: accepted connection from pid 3070, user layus
aoû 07 23:07:06 ankh-morpork nix-daemon[2971]: unexpected Nix daemon error: interrupted by the user
aoû 07 23:08:38 ankh-morpork nix-daemon[2971]: accepted connection from pid 3442, user layus
aoû 07 23:09:29 ankh-morpork nix-daemon[2971]: unexpected Nix daemon error: interrupted by the user
...
and so on. My guess is that after some such cancellations, there is no build user available anymore.
Do you have any idea of
- How to clear the locks without rebooting ?
- How to investigate the issue ?
Needless to say that not being able to build anything is a huge annoyance :-).