From: Trevor Wennblom <trevor@...>
Date: 2007-10-06T00:48:01+09:00
Subject: Solaris, FastCGI, Apache, and "timeout.rb:52: [BUG] Segmentation fault"

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Just installed Ruby 1.8.6-p110. There seems to be a bug related to
net/http, FastCGI, and Apache (1 or 2). I'm seeing this with a Rails-
based application that has no problems with Mongrel, Webrick,
Lighttpd, or Apache/CGI. This is on a Solaris environment, Ruby
compiled with GCC.

% uname -a
SunOS club 5.10 Generic_118822-08 sun4u sparc SUNW,Sun-Fire-V440

% gcc -v
Using built-in specs.
Target: sparc-sun-solaris2.10
Configured with: ../configure --enable-threads=posix --disable-nls --
with-ld=/usr/ccs/bin/ld --with-as=/usr/ccs/bin/as --enable-shared --
enable-languages=c,c++,objc,fortran --disable-libgcj
Thread model: posix
gcc version 4.1.2

I've attempted Ruby 1.8.6-p110 and the stable nightly, both with
these parameters:
    ./configure --disable-pthread --disable-fastthread
or
    ./configure --enable-pthread --enable-fastthread

This is what appears in the Apache error_log:
/usr/local/lib/ruby/1.8/timeout.rb:52: [BUG] Segmentation fault
ruby 1.8.6 (2007-10-02) [sparc-solaris2.10]

This is what appears in the Apache site log:
[(time)] [error] [client (ip)] FastCGI: incomplete headers (0 bytes)
received from server "/mysite/public/dispatch.fcgi"

There are no errors in the Rails fastcgi.crash.log or development.log

Here is the code that triggers the error, specifically the line
"x.request( a )" -

class PostsController < ApplicationController
    # GET /posts
    # GET /posts.xml
    def index
      require 'net/http'
      http = Net::HTTP.new("google.com", 80)
      http.start { |x|
        a = Net::HTTP::Get.new("/")
        x.request( a )
      }
    end
end

Everything worked fine in Ruby 1.8.4. Any help would be appreciated.

-

To followup I've installed several of the Sunfreeware Ruby packages
to narrow down the problem.[1]

The basic steps each attempt:
    - Remove the local/lib/ruby directory
    - pkgrm
    - pkgadd
    - Install RubyGems
    - gem update
    - gem install rake
    - gem install rails
    - gem install fcgi
    - Restart Apache (2 in this case)
    - /usr/bin/pkill -USR1 dispatch.fcgi
    - Test page, look for error

The error is present with:
    ruby-1.8.5p2-sol10-sparc-local
    ruby-1.8.6-sol10-sparc-local

The error is NOT present with:
    ruby-1.8.4-sol10-sparc-local

I really don't have the smarts to say if this is directly caused by
Ruby or how the fcgi (FastCGI - fcgi.so) gem interacts with Ruby.

[1]: ftp://ftp.sunfreeware.com/pub/freeware/sparc/10/

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