cobalt serve: No space left on device (inotify)

[ReinierMaas]

Installed with cargo:

$ cargo install cobalt-bin

Check version:

$ cobalt --version
Cobalt 0.11.1

Init a new repo:

$ cobalt init

Try to serve:

$ RUST_BACKTRACE=1 cobalt serve
[warn]   Syntax theme named 'base16-ocean.dark' ignored. Reason: Themes are unsupported in this build.
[info]   Building from "/home/{username}/Documents/git/kim/" into "/home/{username}/Documents/git/kim/_site"
[info]   Serving "/home/{username}/Documents/git/kim/_site" through static file server
[info]   Server Listening on 127.0.0.1:3000
[info]   Ctrl-c to stop the server
Error: serve command failed
Caused by: Notify error
Caused by: other os error
Caused by: No space left on device (os error 28)
stack backtrace:
   0:     0x55cbd85b639c - backtrace::backtrace::trace::h70189b7bdcf38a84
   1:     0x55cbd85b5a42 - backtrace::capture::Backtrace::new::h28accdc2455b6607
   2:     0x55cbd84fd579 - error_chain::make_backtrace::h5aaf102b17bd8b17
   3:     0x55cbd82b8db6 - <core::result::Result<T, E> as cobalt::error::ResultExt<T>>::chain_err::h19d5cb09d14ef776
   4:     0x55cbd82eb36e - cobalt::serve::serve_command::h02b04a07eb468d9b
   5:     0x55cbd82b4b84 - cobalt::main::ha9e8b6f578046cf7
   6:     0x55cbd82ae022 - std::rt::lang_start::{{closure}}::hc1f48c5420dd2e1d
   7:     0x55cbd85c5867 - std::rt::lang_start_internal::{{closure}}::h04f27adf334bb135
                        at /checkout/src/libstd/rt.rs:59
                         - std::panicking::try::do_call::h0b062116b4efed59
                        at /checkout/src/libstd/panicking.rs:480
   8:     0x55cbd85ed97e - __rust_maybe_catch_panic
                        at /checkout/src/libpanic_unwind/lib.rs:101
   9:     0x55cbd85cdb59 - std::panicking::try::hf432286c16355f4a
                        at /checkout/src/libstd/panicking.rs:459
                         - std::panic::catch_unwind::h55bfca99277eb60c
                        at /checkout/src/libstd/panic.rs:365
                         - std::rt::lang_start_internal::h6bcde385b3ee3341
                        at /checkout/src/libstd/rt.rs:58
  10:     0x55cbd82b6323 - main
  11:     0x7f113aa9b1c0 - __libc_start_main
  12:     0x55cbd82973d9 - _start
  13:                0x0 - <unknown>

I have about ~50GB of free space on the disk that was used.

[epage]

What version of Rust are you using? What OS and version is this?

That seems strange that this error is coming up from the file system notifications.
https://github.com/cobalt-org/cobalt.rs/blob/master/src/bin/cobalt/serve.rs#L171

Why would that care about disk space?

What happens when do you call cobalt build instead?

[ReinierMaas]

The latest stable Rust and the latest version of Ubuntu. $ cargo --version cargo 0.25.0 (8c93e0895 2018-02-01) $ rustc --version rustc 1.24.0 (4d90ac38c 2018-02-12) $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 17.10 Release: 17.10 Codename: artful

[Geobert]

Rust 1.24.1 just came out to fix many regression, can you see if it's still happening?

[ReinierMaas]

Yes I have tried this but it didn't fix the problem

@epage When I build the page it gets build. So it is the serving part that crashes

$ cobalt build
[warn]   Syntax theme named 'base16-ocean.dark' ignored. Reason: Themes are unsupported in this build.
[info]   Building from "/home/{username}/Documents/git/kim/" into "/home/{username}/Documents/git/kim/_site"
[info]   Build successful

The built-in --trace statement. This is the tail of calling cobalt --trace serve:

[info]   Serving "/home/reinier/Documents/git/kim/_site" through static file server
[info]   Server Listening on 127.0.0.1:3000
[info]   Ctrl-c to stop the server
[debug]  threads = 10
[trace]  registering with poller
[trace]  registering with poller
[trace]  event loop tick
[trace]  tick_to; now=0; tick=0
[trace]  ticking; curr=Token(18446744073709551615)
[trace]  event loop tick
Error: serve command failed
Caused by: Notify error
Caused by: other os error
Caused by: No space left on device (os error 28)
[trace]  tick_to; now=0; tick=1

[epage]

Ok, good, there aren't problems with build. So the problem is only in serve where we watch for file system changes and auto-rebuild.

So a workaround for this is to call cobalt serve --no-watch. You'll then need to kill and restart that every time you want to view the latest version of your site.

Looks like this is a terrible way of saying you've reached a limit in inotify and might need to raise it. See notify-rs/notify#103

We should probably add this to the website as a FAQ item.

[epage]

Created an issue for documenting this on the website. Closing this in favor of that issue.