[#JRUBY-1277] Mongrel clashes with JVM for the right to handle SIGUSR1

JRuby

Mongrel clashes with JVM for the right to handle SIGUSR1

Created: 17/Aug/07 01:16 AM Updated: 22/Dec/07 06:26 AM

Component/s:

JRuby-extras

Affects Version/s:

JRuby 1.1+

Fix Version/s:

JRuby 1.0.3, JRuby 1.1RC2

Time Tracking:

Not Specified

Environment:

« Hide

JRuby trunk, rev 4178
JVM 1.6.0-b105
Ubuntu 7.0 desktop
mongrel-1.0.1-jruby.gem
Rails 1.2.3
skeleton Rails app produced by 'rails foo'

Issue Links:

Duplicate

This issue is duplicated by:

~~JRUBY-1581~~ Signal#trap doesn't handle failure of trapping gracefully.

Description

« Hide

run jruby script/server webrick - everything starts and works fine and dandy
run jruby script/server mongrel - exception is thrown when Mongrel tries to set up a signal handler for USR1

relevant bits of the stack trace:

Signal.java:149:in `sun.misc.Signal.handle': java.lang.IllegalArgumentException: Signal already used by VM: SIGUSR1 (NativeException)
...
from Main.java:96:in `org.jruby.Main.main'
from /home/alexeyv/src/jruby/jruby/lib/ruby/gems/1.8/gems/mongrel-1.0.1-jruby/lib/mongrel/configurator.rb:362:in `setup_signals'
...

JVM handles USR1 itself. I tried passing java a -XX:+UseAltSigs option, but it didn't help.