我有这个测试代码:
require 'drb/drb'
DRb.start_service(nil, "hello")
puts DRb.uri
DRb.thread.join()
如果我然后使用类似nmap的东西探测它抓取的端口,经过一些探测后,应用程序崩溃了。
在JRuby 1.7下,我得到了这个堆栈:
Errno::ENOPROTOOPT: Protocol not available - Protocol not available
setsockopt at org/jruby/ext/socket/RubyBasicSocket.java:294
set_sockopt at /Users/kimptoc/.rvm/rubies/jruby-1.7.3/lib/ruby/1.9/drb/drb.rb:1005
initialize at /Users/kimptoc/.rvm/rubies/jruby-1.7.3/lib/ruby/1.9/drb/drb.rb:927
accept at /Users/kimptoc/.rvm/rubies/jruby-1.7.3/lib/ruby/1.9/drb/drb.rb:991
main_loop at /Users/kimptoc/.rvm/rubies/jruby-1.7.3/lib/ruby/1.9/drb/drb.rb:1615
run at /Users/kimptoc/.rvm/rubies/jruby-1.7.3/lib/ruby/1.9/drb/drb.rb:1465
在Ruby 1.9.3-392下,堆栈是这样的:
/Users/kimptoc/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/drb/drb.rb:964:in `setsockopt': Invalid argument (Errno::EINVAL)
from /Users/kimptoc/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/drb/drb.rb:964:in `set_sockopt'
from /Users/kimptoc/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/drb/drb.rb:886:in `initialize'
from /Users/kimptoc/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/drb/drb.rb:950:in `new'
from /Users/kimptoc/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/drb/drb.rb:950:in `accept'
from /Users/kimptoc/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/drb/drb.rb:1574:in `main_loop'
from /Users/kimptoc/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/drb/drb.rb:1424:in `block in run'
有没有办法让dRuby更健壮(例如某个选项或配置设置),并且在这些情况下不会崩溃。
更新
通过将代码置于这样的循环中,这似乎使其更具弹性 - 但这是最好的前进方式:
while true
begin
DRb.start_service("druby://localhost:12345", "hello")
puts DRb.uri
DRb.thread.join()
rescue Exception => e
puts e.message
end
end
TIA