R Studio terminal occasionally hangs with websocket error

[davidread]

Error: [2019-01-28 10:26:02] [error] handle_read_frame error: websocketpp.transport:7 (End of File) I think this is what I get when my RStudio Terminal hangs and won't accept commands (everything else works it's no biggie). (BL)

Others said:

I see (and ignore) this one often. (RI)

Workarounds

• Open a new terminal (Alt+Shift+R) and close the frozen one.
• You can turn off R Studio's use of websockets in R Studio in the preferences, which should avoid this occurring

[MeganStodel]

FYI I've been seeing this for the first time today, fixed by closing terminal.

[ben-lavelle]

Just to note I get this probably more than 'occasionally', and often run up 4-5 terminals to call a couple of terminal commands--I expect to get it every session many times.

Whilst usually just an irritation, it can cause more serious problems if it hangs in the middle of a process; I had it today in the middle of a complicated merge commit (while git had opened Vim for editing the merge message) that caused real headache and rework, and in the past have had it on delicate cherry-picks (in the middle of choosing commits in Vim) that I've ended up abandoning because of this error.

[ghuiber]

This happens to me occasionally too, when I resume work on a long-running project. I think I know what causes it. In the project folder, in addition to the <project_name>.Rproj file, there is a hidden directory called .Rproj.user which tends to accumulate all kinds of cruft over time. I just sudo rm -Rf the thing. It is rebuilt every time you re-launch the project if it's not already present. This fixes the hanging terminal issue and a related issue where besides the hanging terminal I cannot close RStudio other than by force-quitting it. I am on a Mac, running macOS Mojave.