Bug #17791: Ractor exception when using Nokogiri

• Status: Third Party's Issue
• Assignee: -
• Target version: -
• Backport: 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN

[tomanderson (Thomas Ender)]

Parsing xml using nokogiri:

  doc = Nokogiri.XML('<foo><bar /></foo>', nil, 'EUC-JP')

Suppose I want to parse 4 xmls with 4 ractors, it will raise an unsafe exception:

Ractor::UnsafeError: ractor unsafe method called from not main ractor

the ruby version is 3.0.1.

I wonder if there is any way to avoid this.

[xtkoba (Tee KOBAYASHI)]

This is because a function (read_memory) in a C extension (nokogiri.so) is called which is not marked as ractor-safe (see Feature #17307).

A workaround would be to mark it so, although I don't know if it is truly ractor-safe.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Rejected

Based on @xtkoba's analysis, closing as this doesn't appear to be a bug in Ruby.

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Status changed from Rejected to Third Party's Issue