[Nix-dev] nix-store --import hang

[Colin Putney]

Hi folks,

I ran into a strange problem with nixops last night, and I can't figure out
how to proceed.

I was trying to install a new version of my app, which had been deployed
using nixops. The deploy command repeatedly hung while copying a closure to
the target machine. (Indefinitely on a Mac, but the NixOS version of NixOps
would timeout eventually.) Poking around on the target machine, it seems
that `nix-store --import` had hung. Even if I killed the ssh from the
client end, that process would hang around on the target machine,
apparently doing nothing. I couldn't detect any corruption in the nix-store
database, and the hang would happen even on freshly-launched EC2 instance.

This started happening after I updated my nixpkgs-unstable channel, but I
don't know if that's related.

Any ideas?

Colin
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