#44 GC error ? - Johnson

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#44 new

GC error ?

Reported by Jonah Fox | July 18th, 2008 @ 04:05 AM | in 1.0

I keep getting the following (in Rails)

Assertion failure: !rt->gcRunning, at jsgc.c:1737

Trace/BPT trap

It seems to occur after a second web request

I'm doing something like :

def transist event

johnson = Johnson::Runtime.new

js_scripts = ... load files

johnson.evaluate(js_scripts)

end

is this incorrect ?

Comments and changes to this ticket

Ripta Pasay July 20th, 2008 @ 02:44 PM
The assertion failure seems to only happen when the second request doesn't use Johnson::Runtime, but the first does. For example,
```
class HomeController < ApplicationController
  
  def index
  end
  
  def johnson
    js = Johnson::Runtime.new
    render :text => js.evaluate("new Date()")
  end
  
end
```
The behavior I'm consistently seeing is:
- Requesting /home/index (zero or more times), and then /home/johnson (one or more times) completes without any error.
- Requesting /home/johnson (one or more times), then /home/index errors out when /home/index is requested.
I've only tested this on OS X 10.4 running Rails 2.1.0 and latest Johnson (July 6, 2008) on ruby 1.8.6-pl0.
The ruby backtrace is attached.
Let me know how I can help.
- johnson-ruby.txt 10.4 KB
Ripta Pasay July 20th, 2008 @ 02:52 PM
Oops... I guess I cleared the assigned field, and Lighthouse ain't telling me who it was assigned to originally. Sigh.
Jonah Fox July 21st, 2008 @ 02:10 AM
This is the exact error I am seeing,
Jonah Fox July 21st, 2008 @ 09:54 AM
I also occasionally see :
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285: [BUG] Segmentation fault
ruby 1.8.6 (2008-03-03) [universal-darwin9.0]
Abort trap
It seems to happen in place of the assertion failure.
John Barnette July 21st, 2008 @ 09:59 AM
Shooting this over to AP, since he was looking for it.
Jonah Fox July 22nd, 2008 @ 01:50 AM
OK - more info
Tried in Merb (mongrel) - no failure.
Tried in Rails with Thin backend - no failure.
so it looks like it's something to do with mongrel on Rails
weird ?
Jonah Fox August 17th, 2008 @ 09:00 AM
New info - not sure if it helps, but Johnson doesn't crash when running on Passenger.

So that's just mongrel/rails where it crashes.

J