Brian said:
Yes: it's called "debugging".
Rails displays that page when an uncaught exception has been raised in
your code. So your program has an error. You have to find and fix your
error.
Look in the log file (or on the screen if you're using script/server to
start Rails) and you'll see a detailed description of the error with a
full backtrace. This will show you the line with the error in it, a
description of the error, and the method call chain which ended up at
this point in the program. Correct the error, and try again.
If you run rails in development rather than production mode, the
exception will be displayed in the browser too.
If you want help with debugging on this (or any other) mailing list, at
the very minimum you'll have to post the exception you get, and the
relevant lines of your program which the exception refers to.
ok..............
this problem occour when i run with ......ruby scrit/server
wy this problem come ...give me ur idea!!!!!!!!!!!!!!!!!!!
/!\ FAILSAFE /!\ Wed Nov 18 10:07:21 +0530 2009
Status: 500 Internal Server Error
no such file to load -- sqlite3
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require'
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:156:in
`require'
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:521:in
`new_constants_in'
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:156:in
`require'
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/core_ext/kernel/requires.rb:7:in
`require_library_or_gem'
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/core_ext/kernel/reporting.rb:11:in
`silence_warnings'
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/core_ext/kernel/requires.rb:5:in
`require_library_or_gem'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:10:in
`sqlite3_connection'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in
`send'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in
`new_connection'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:245:in
`checkout_new_connection'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:188:in
`checkout'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in
`loop'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in
`checkout'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:183:in
`checkout'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:98:in
`connection'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:326:in
`retrieve_connection'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in
`retrieve_connection'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in
`connection'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/query_cache.rb:9:in
`cache'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/query_cache.rb:28:in
`call'
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/head.rb:9:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/methodoverride.rb:24:in
`call'
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/params_parser.rb:15:in
`call'
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/session/cookie_store.rb:93:in
`call'
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/failsafe.rb:26:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in
`synchronize'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in
`call'
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/dispatcher.rb:114:in
`call'
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/reloader.rb:34:in
`run'
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/dispatcher.rb:108:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rails-2.3.4/lib/rails/rack/static.rb:31:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:46:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in
`each'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rails-2.3.4/lib/rails/rack/log_tailer.rb:17:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/content_length.rb:13:in
`call'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/handler/webrick.rb:50:in
`service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `each'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/handler/webrick.rb:14:in
`run'
/usr/lib64/ruby/gems/1.8/gems/rails-2.3.4/lib/commands/server.rb:111
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_original_require'
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require'
script/server:3