ruby-core@ruby-lang.org archive (unofficial mirror)
 help / color / mirror / Atom feed
From: "esad (Esad Hajdarevic) via ruby-core" <ruby-core@ml.ruby-lang.org>
To: ruby-core@ml.ruby-lang.org
Cc: "esad (Esad Hajdarevic)" <noreply@ruby-lang.org>
Subject: [ruby-core:117727] [Ruby master Bug#20459] Ractor.select() deadlock?
Date: Fri, 26 Apr 2024 12:27:02 +0000 (UTC)	[thread overview]
Message-ID: <redmine.issue-20459.20240426122701.53307@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-20459.20240426122701.53307@ruby-lang.org

Issue #20459 has been reported by esad (Esad Hajdarevic).

----------------------------------------
Bug #20459: Ractor.select() deadlock?
https://bugs.ruby-lang.org/issues/20459

* Author: esad (Esad Hajdarevic)
* Status: Open
* ruby -v: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin20]
* Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN
----------------------------------------
When I run this script


```
echo = Ractor.new { Ractor.receive }
Thread.new { puts Ractor.select(echo).inspect }
sleep 0.1
echo.send "test"
```

the script never terminates. If I change thread body to

```
Thread.new { puts echo.take.inspect }
```

or introduce a small delay before #select like:

```
Thread.new { sleep 1; puts Ractor.select(echo).inspect }
```

then it works/terminates.




-- 
https://bugs.ruby-lang.org/
 ______________________________________________
 ruby-core mailing list -- ruby-core@ml.ruby-lang.org
 To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
 ruby-core info -- https://ml.ruby-lang.org/mailman3/postorius/lists/ruby-core.ml.ruby-lang.org/

       reply	other threads:[~2024-04-26 12:27 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-26 12:27 esad (Esad Hajdarevic) via ruby-core [this message]
2024-04-26 15:59 ` [ruby-core:117728] [Ruby master Bug#20459] Ractor.select() deadlock? luke-gru (Luke Gruber) via ruby-core

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-list from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.ruby-lang.org/en/community/mailing-lists/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=redmine.issue-20459.20240426122701.53307@ruby-lang.org \
    --to=ruby-core@ruby-lang.org \
    --cc=noreply@ruby-lang.org \
    --cc=ruby-core@ml.ruby-lang.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).