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branch master updated: website: Add post about the new 'error/success-se
|
From: |
Ludovic Courtès |
|
Subject: |
branch master updated: website: Add post about the new 'error/success-service-type'. |
|
Date: |
Sat, 01 Apr 2023 04:49:49 -0400 |
This is an automated email from the git hooks/post-receive script.
civodul pushed a commit to branch master
in repository guix-artwork.
The following commit(s) were added to refs/heads/master by this push:
new 80fc799 website: Add post about the new 'error/success-service-type'.
80fc799 is described below
commit 80fc79926c3939ad0beedc61935dcb7597fa7d50
Author: Ludovic Courtès <ludo@gnu.org>
AuthorDate: Sat Apr 1 10:45:20 2023 +0200
website: Add post about the new 'error/success-service-type'.
* website/posts/error-success.md,
website/static/blog/img/error-success-sticker-bird.jpg,
website/static/blog/img/error-success-sticker-pile.jpg,
website/static/blog/img/error-success-sticker.svg,
website/static/blog/img/error-success.jpg: New files.
---
website/posts/error-success.md | 167 +++++++++++++++++++
.../static/blog/img/error-success-sticker-bird.jpg | Bin 0 -> 296689 bytes
.../static/blog/img/error-success-sticker-pile.jpg | Bin 0 -> 343349 bytes
website/static/blog/img/error-success-sticker.svg | 180 +++++++++++++++++++++
website/static/blog/img/error-success.jpg | Bin 0 -> 125587 bytes
5 files changed, 347 insertions(+)
diff --git a/website/posts/error-success.md b/website/posts/error-success.md
new file mode 100644
index 0000000..f205a14
--- /dev/null
+++ b/website/posts/error-success.md
@@ -0,0 +1,167 @@
+title: Reinstating an iconic error message
+author: Ludovic Courtès
+tags: System services, Community
+date: 2023-04-01 11:00:00
+---
+
+Software development is a social process. What might be a “bug” for
+someone might well be a “feature” for someone else. The Guix project
+rediscovered it the hard way when, after “fixing a bug” that had been
+present in Guix System for years, was confronted with an uproar in its
+user base.
+
+In this post we look at why developers considered the initial behavior a
+“bug”, why users on the contrary had come to rely on it, and why
+developers remained blind to it. A patch to reinstate the initial
+behavior [is being reviewed](https://issues.guix.gnu.org/62584). This
+post is also an opportunity for us Guix developers to extend our
+apologies to our users whose workflow was disrupted.
+
+# The crux of the matter
+
+Anyone who’s used Guix System in the past has seen this message on the
+console during the boot process:
+
+```
+error in finalization thread: Success
+```
+
+The following picture shows a typical boot screen (with additional
+messages in the same vein):
+
+
+
+If you have never seen it before, it may look surprising to you. Guix
+System users lived with it literally for years; the message became a
+hint that the boot process was, indeed, successful.
+
+A few months ago, a contributor sought to satisfy their curiosity by
+finding the origin of the message. It did look like a spurious error
+message, after all, and perhaps the right course of action would be to
+address the problem at its root—or so they thought.
+
+As it turns out, the message [originated in
+Guile](https://git.savannah.gnu.org/cgit/guile.git/tree/libguile/finalizers.c#n238?id=df86a2a8c8725ac6244a222d399a5b959101f621)—check
+out the [Guile
+manual](https://www.gnu.org/software/guile/manual/html_node/Foreign-Object-Memory-Management.html)
+if you’re curious about finalization. Investigation revealed two
+things: first, that this `perror` call in Guile was presumably reporting
+the wrong error code—this was
+[fixed](https://git.savannah.gnu.org/cgit/guile.git/commit/?id=1fbe89f7bdbf35408ec2df8de755c2f1323016a6).
+
+The second error—the core of the problem—lied in Guix System itself.
+Remember that, in its quest of memory safety™, statelessness, and fun,
+Guix System does it all in Guile Scheme—well, except for the kernel (for
+now). As soon as Linux has booted, Guix System spawns Guile to run boot
+code that’s in its [*initial RAM
+disk*](https://guix.gnu.org/manual/en/html_node/Initial-RAM-Disk.html)
+(“initrd”). Right before executing
+[`shepherd`](https://gnu.org/software/shepherd), its service manager, as
+PID 1, the initrd code would carelessly close all the file descriptors
+above 2 to make sure they do not leak into PID 1. The problem—you
+guessed it—is that one of them was the now-famous file descriptor of the
+finalization thread’s pipe; the finalization thread would quickly notice
+and boom!
+
+```
+error in finalization thread: Success
+```
+
+Our intrepid developers thought: “hey, we found it! Let’s fix it!”. And
+so [they
+did](https://git.savannah.gnu.org/cgit/guix.git/commit/?id=168a7933c0e138dc7061a3f0dc96871e16da5c5f).
+
+# Breaking user workflows
+
+This could have been the end of the story, but there’s more to it than
+software. As Xkcd [famously captured](https://xkcd.com/1172/), this was
+bound to break someone’s workflow. Indeed, had developers paid more
+attention to what users had to say, they would have *known* that the
+status quo was preferable.
+
+For some time now, users had shown that they held the error/success
+message deep in their heart. The message was seen on the blackboard at
+the [Ten Years of Guix](https://10years.guix.gnu.org) celebration, as a
+motto, as a rallying cry, spontaneously put on display:
+
+
+
+What’s more, a fellow NixOS hacker and Guix enthusiast, beguiled by this
+powerful message, [designed](/static/blog/img/error-success-sticker.svg)
+stickers and brought them to FOSDEM in February 2023:
+
+
+
+The sticker design builds upon the “test pilot” graphics made by Luis
+Felipe for the [1.3.0
+release](https://guix.gnu.org/en/blog/2021/gnu-guix-1.3.0-released/).
+The test pilot has a bug on its helmet. In a way, the drawing and error
+message both represent, metaphorically, a core tenet of Guix as a
+project; just like Haskell is *avoiding success at all costs*, Guix
+seems trapped in an *error/success* quantum state.
+
+Had it gone too far? Was calling it a “bug” the demonstration of the
+arrogance of developers detached from the reality of the community?
+
+# Fixing our mistakes
+
+Those who installed Guix System starting from [version
+1.4.0](https://guix.gnu.org/en/blog/2022/gnu-guix-1.4.0-released/) have
+been missing out on the error/success boot message. The patch
+[submitted today](https://issues.guix.gnu.org/62584) finally reinstates
+that message. The review process will determine whether consensus is to
+enable it by default—as part of
+[`%base-service`](https://guix.gnu.org/manual/en/html_node/Base-Services.html#index-_0025base_002dservices-1)—or
+whether to make it optional—after all, we also need to accommodate the
+needs of *new* users who never saw this message. This will allow users
+to restore their workflow, while also ensuring that those freshly
+printed stickers remain relevant.
+
+This incident had broader consequences in the project. It led some to
+suggest that we, finally, set up a *request-for-comment* (RFC) kind of
+process that would give all the community a say on important topics—a
+process most large free software projects have developed in one form or
+another. Such a process could have prevented this incident: instead of
+arrogantly labeling it as a “bug”, developers would have proposed an RFC
+to remove the message; the discussion period, most likely, would have
+made it clear that removal was not a desirable outcome and we would all
+have moved on.
+
+This incident made many users uncomfortable, but we are glad that it is
+now being addressed. The lessons learned will be beneficial to the
+project for the years to come.
+
+
+
+# Credits
+
+> [Test
+>
pilot](https://git.savannah.gnu.org/cgit/guix/guix-artwork.git/tree/promotional/)
+> by Luis Felipe distributed under the terms of
+> [CC-BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/);
+> sticker design distributed under
+> [CC-BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/) as
+> well. Blackboard picture by Julien Lepiller under
+> [CC0](https://creativecommons.org/publicdomain/zero/1.0/); sticker
+> pictures under
+> [CC0](https://creativecommons.org/publicdomain/zero/1.0/).
+>
+> Many thanks to the anonymous sticker provider!
+
+#### About GNU Guix
+
+[GNU Guix](https://guix.gnu.org) is a transactional package manager and
+an advanced distribution of the GNU system that [respects user
+freedom](https://www.gnu.org/distros/free-system-distribution-guidelines.html).
+Guix can be used on top of any system running the Hurd or the Linux
+kernel, or it can be used as a standalone operating system distribution
+for i686, x86_64, ARMv7, AArch64 and POWER9 machines.
+
+In addition to standard package management features, Guix supports
+transactional upgrades and roll-backs, unprivileged package management,
+per-user profiles, and garbage collection. When used as a standalone
+GNU/Linux distribution, Guix offers a declarative, stateless approach to
+operating system configuration management. Guix is highly customizable
+and hackable through [Guile](https://www.gnu.org/software/guile)
+programming interfaces and extensions to the
+[Scheme](http://schemers.org) language.
diff --git a/website/static/blog/img/error-success-sticker-bird.jpg
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diff --git a/website/static/blog/img/error-success-sticker-pile.jpg
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diff --git a/website/static/blog/img/error-success-sticker.svg
b/website/static/blog/img/error-success-sticker.svg
new file mode 100644
index 0000000..168a9da
--- /dev/null
+++ b/website/static/blog/img/error-success-sticker.svg
@@ -0,0 +1,180 @@
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diff --git a/website/static/blog/img/error-success.jpg
b/website/static/blog/img/error-success.jpg
new file mode 100644
index 0000000..c74c2ce
Binary files /dev/null and b/website/static/blog/img/error-success.jpg differ
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- branch master updated: website: Add post about the new 'error/success-service-type'.,
Ludovic Courtès <=