Network stack throws error with high amount of traffic

[passbe]

I got these errors, that resulted in cpu => 50% and BeEF freeze,
when playing with Burp Scanner on two resources, using the following increased scanning engine config:

thread count: 20
retried on net failure: 2
pause before retry (millis): 500

So yes, very hazard settings.
I was hoping to get some errors, to see where things can hang.
Here we go :-)

[:39:56]←[33m[>]←[0m [PROXY] Forwarding request: host[192.168.10.128], method[GET], path[/dvwa/vulnerabilities/sqli/], urlparams[id=abcde../../../../../../../../../../windows/win.ini&Submit=Submit], body[]
[:39:56]←[33m[>]←[0m [PROXY] Forwarding request: host[192.168.10.128], method[GET], path[/dvwa/vulnerabilities/xss_r/], urlparams[name=)(sn=], body[]
[2011-06-28 10:40:06] ERROR NoMethodError: undefined method []' for nil:NilClass C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:80:inexpunge'
C:/Ruby187/lib/ruby/gems/1.8/gems/json-1.5.1-x86-mingw32/lib/json/pure/parser.rb:148:in sort_by' C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:80:ineach'
C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:80:in sort_by' C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:80:inexpunge'
C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:53:in check_packets' C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:41:ineach'
C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:41:in check_packets' C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:33:indo_GET'
C:/Ruby187/lib/ruby/1.8/webrick/httpservlet/abstract.rb:35:in __send__' C:/Ruby187/lib/ruby/1.8/webrick/httpservlet/abstract.rb:35:inservice'
C:/Ruby187/lib/ruby/1.8/webrick/httpserver.rb:104:in service' C:/Ruby187/lib/ruby/1.8/webrick/httpserver.rb:65:inrun'
C:/Ruby187/lib/ruby/1.8/webrick/server.rb:173:in start_thread' C:/Ruby187/lib/ruby/1.8/webrick/server.rb:162:instart'
C:/Ruby187/lib/ruby/1.8/webrick/server.rb:162:in start_thread' C:/Ruby187/lib/ruby/1.8/webrick/server.rb:95:instart'
C:/Ruby187/lib/ruby/1.8/webrick/server.rb:92:in each' C:/Ruby187/lib/ruby/1.8/webrick/server.rb:92:instart'
C:/Ruby187/lib/ruby/1.8/webrick/server.rb:23:in start' C:/Ruby187/lib/ruby/1.8/webrick/server.rb:82:instart'
C:/BeEF/./core/main/server.rb:101:in start' beef:64 [2011-06-28 10:40:06] ERROR NoMethodError: undefined method[]' for nil:NilClass
C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:80:in expunge' C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:80:insort_by'
C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:80:in each' C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:80:insort_by'
C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:80:in expunge' C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:53:incheck_packets'
C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:41:in each' C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:41:incheck_packets'
C:/BeEF/./core/main/network_stack/handlers/dynamicreconstruction.rb:33:in do_GET' C:/Ruby187/lib/ruby/1.8/webrick/httpservlet/abstract.rb:35:insend'
C:/Ruby187/lib/ruby/1.8/webrick/httpservlet/abstract.rb:35:in service' C:/Ruby187/lib/ruby/1.8/webrick/httpserver.rb:104:inservice'
C:/Ruby187/lib/ruby/1.8/webrick/httpserver.rb:65:in run' C:/Ruby187/lib/ruby/1.8/webrick/server.rb:173:instart_thread'
C:/Ruby187/lib/ruby/1.8/webrick/server.rb:162:in start' C:/Ruby187/lib/ruby/1.8/webrick/server.rb:162:instart_thread'
C:/Ruby187/lib/ruby/1.8/webrick/server.rb:95:in start' C:/Ruby187/lib/ruby/1.8/webrick/server.rb:92:ineach'
C:/Ruby187/lib/ruby/1.8/webrick/server.rb:92:in start' C:/Ruby187/lib/ruby/1.8/webrick/server.rb:23:instart'
C:/Ruby187/lib/ruby/1.8/webrick/server.rb:82:in start' C:/BeEF/./core/main/server.rb:101:instart'
beef:64
[:40:06]←[34m[*]←[0m [PROXY] Response for request #219 to [/dvwa/vulnerabilities/xss_r/] on domain [192.168.10.128:80] correctly processed


Google Code Issue: http://code.google.com/p/beef/issues/detail?id=358

[passbe]

[email protected] on November 24, 2011 16:00:39:

I was testing again with the same Burp settings, and never seen the error with the new Thin and multi-threaded tunneling proxy.

Webrick was really causing us a lot of problems.

Google Code Comment: http://code.google.com/p/beef/issues/detail?id=358#c19