Hi Ada, Ada Stevenson <adansk...@gmail.com> skribis:
> Sometimes, usually when I'm on an enterprise network like my > university's of library's wifi, the `guix substitute` process dies > with a "TLS error in procedure 'write_to_session_record_port': Error > in the push function" error message. My connection is rock-solid > otherwise, and sometimes it doesn't happen at all. What version of guix-daemon are you using? Was it installed through ‘guix pull’ or via another distro? I’ve seen this before but I haven’t experienced it in a long time, so I wonder if I’m just lucky or if there are other factors at play. > I'm not sure if this is a fault in the actual Guix code, or there's > some Guile library somewhere that has this bug. Anyway, I think it > would be a useful feature to have a way to automatically restart the > `guix substitute` process or otherwise recover from this error. Some > sort of `--restart=no.restarts.permitted` flag. Whenever I'm updating > my system I tend to leave and do something else, and when this happens > I come back and nothing's actually been done, and the error is > transient so I don't gain anything from seeing this message. ‘guix substitute’ is a ‘guix-daemon’ helper, which automatically (re)starts it when needed. Now, what we could do is have ‘guix substitute’ gracefully handle those errors and keep going. I believe this one-liner should do it:
diff --git a/guix/scripts/substitute.scm b/guix/scripts/substitute.scm index 37cd08e289..3af0bf0019 100755 --- a/guix/scripts/substitute.scm +++ b/guix/scripts/substitute.scm @@ -494,7 +494,9 @@ (define* (download-nar narinfo destination (define (try-fetch choices) (match choices (((uri compression file-size) rest ...) - (guard (c ((and (pair? rest) (http-get-error? c)) + (guard (c ((and (pair? rest) + (or (http-get-error? c) + (network-error? c))) (warning (G_ "download from '~a' failed, trying next URL~%") (uri->string uri)) (try-fetch rest)))
I’ll go ahead with this change if there are no objections. Thanks, Ludo’.