Lost my work because I forgot to save, and the unsaved file version wasn't up-to-date

[bgoosmanviz]

After a series of unfortunate events, I lost a few hours of work.

1. A very long (4000 lines) string caused alt+cmd+f (format) to crash and restart the notebook.
2. I decided to save the string into a file. Clicked "Add File", Livebook crashed.
3. docker restart livebook. Notice I didn't save the notebook 🤦🏻. Go looking in the unsaved files, find it, but the contents are out of date.

Oops, my fault. The logs aren't very helpful as to how Livebook crashed in the first place.

Maybe the run command is helpful. Running on Ubuntu.

docker run --network host \
        --pull always \
        -d \
        --name livebook \
        -u $(id -u):$(id -g) \
        -v $(pwd):/data \
        -v ~/livebook-config:/config \
        -e "LIVEBOOK_HOME=/data" \
        -e "LIVEBOOK_DATA_PATH=/config" \
        -e "LIVEBOOK_PASSWORD=..." \
        -e "LIVEBOOK_PORT=8090" \
        -e "LIVEBOOK_IFRAME_PORT=8091" \
                ghcr.io/livebook-dev/livebook

Logs show this over and over again.

20:42:09.366 [error] Task #PID<0.19202.0> started from #PID<0.981.0> terminating
** (stop) exited in: GenServer.call({:via, Registry, {Livebook.HubsRegistry, "..."}}, :get_file_systems, 5000)
    ** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started
    (elixir 1.17.2) lib/gen_server.ex:1121: GenServer.call/3
    (elixir 1.17.2) lib/enum.ex:4353: Enum.flat_map_list/2
    (elixir 1.17.2) lib/enum.ex:4354: Enum.flat_map_list/2
    (livebook 0.14.4) lib/livebook/hubs.ex:258: Livebook.Hubs.get_file_systems/0
    (livebook 0.14.4) lib/livebook/file_system/file.ex:395: Livebook.FileSystem.File.do_fetch_file_system/1
    (livebook 0.14.4) lib/livebook/file_system/file.ex:202: Livebook.FileSystem.File.write/2
    (livebook 0.14.4) lib/livebook/session.ex:2631: anonymous fn/3 in Livebook.Session.maybe_save_notebook_async/1
    (elixir 1.17.2) lib/task/supervised.ex:101: Task.Supervised.invoke_mfa/2
Function: #Function<49.52123208/0 in Livebook.Session.maybe_save_notebook_async/1>
    Args: []

[bgoosmanviz]

Side note: Didn't take long to rewrite code, and I decided to store my bulky string in Tigris Storage. Using ExAWS works well. :)

[josevalim]

This is unexpected. We save it every 5 seconds I believe, so the loss should have been minimal. 🤔

[jonatanklosko]

@bgoosmanviz does the notebook use a Teams workspace?

[jonatanklosko]

Actually, this shouldn't matter, it should be saved even if stamping with Teams fails.

[bgoosmanviz]

It does

[jonatanklosko]

A very long (4000 lines) string caused alt+cmd+f (format) to crash and restart the notebook.

Is this something you can reproduce with the same string? Formatting should definitely not crash the notebook, especially that it happens in the runtime, so if anything the runtime would crash (and that shouldn't happen either).

[bgoosmanviz]

Just tried with the same string in an empty notebook and with a fork of my last notebook, no repro. :( Thx for looking, but I can't repro anymore.

[bgoosmanviz]

I can't repro any of this anymore. I'm not sure what sort of state (must have been quite the state!) I was in, but I am in it no longer 🤷🏻