我使用Ruby和Sequel，PostgreSQL（＆＃39; pg＆＃39; gem）和em-webosket来解析一些数据并将其存储在数据库中。我通过＆＃39;守护进程运行我的脚本＆＃39;宝石。
有时候，当我的脚本崩溃时，我会在守护进程日志中收到此错误。我怎样才能找到错误的来源？
I, [2015-07-07T11:15:32.476751 #21491] INFO -- : *** below you find all exception objects found in memory, some of them may have been thrown in your application, others may just be in memory because they are standard exceptions *** E, [2015-07-07T11:15:32.477956 #21491] ERROR -- : stream closed (IOError) E, [2015-07-07T11:15:32.478231 #21491] ERROR -- : failed to allocate memory (NoMemoryError) E, [2015-07-07T11:15:32.478350 #21491] ERROR -- : stack level too deep (SystemStackError) E, [2015-07-07T11:15:32.478758 #21491] ERROR -- : exception reentered (fatal) E, [2015-07-07T11:15:32.481995 #21491] ERROR -- : No such file or directory @ unlink_internal - /home/cloud/paralela/ws.rb_monitor.pid (Errno::ENOENT)
/home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/pidfile.rb:103:in `delete' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/pidfile.rb:103:in `zap' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/monitor.rb:114:in `stop' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:158:in `stop_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/controller.rb:64:in `run' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons.rb:144:in `block in run' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/cmdline.rb:88:in `call' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/cmdline.rb:88:in `catch_exceptions' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons.rb:143:in `run' server.rb:3:in `<main>' E, [2015-07-07T11:15:32.483217 #21491] ERROR -- : cannot load such file -- sequel (LoadError)
/home/cloud/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' /home/cloud/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' /home/cloud/paralela/ws.rb:6:in `<top (required)>' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application.rb:218:in `load' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application.rb:218:in `start_load' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application.rb:297:in `start' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:151:in `block (2 levels) in start_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:150:in `fork' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:150:in `block in start_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:149:in `each' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:149:in `start_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/controller.rb:66:in `run' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons.rb:144:in `block in run' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/cmdline.rb:88:in `call' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/cmdline.rb:88:in `catch_exceptions' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons.rb:143:in `run' server.rb:3:in `<main>' E, [2015-07-07T11:15:32.487555 #21491] ERROR -- : cannot load such file -- sequel_pg (LoadError)
/home/cloud/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' /home/cloud/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' /home/cloud/.rvm/gems/ruby-2.2.1/gems/sequel-4.23.0/lib/sequel/adapters/postgres.rb:855:in `<top (required)>' /home/cloud/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' /home/cloud/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' /home/cloud/.rvm/gems/ruby-2.2.1/gems/sequel-4.23.0/lib/sequel/database/connecting.rb:97:in `load_adapter' /home/cloud/.rvm/gems/ruby-2.2.1/gems/sequel-4.23.0/lib/sequel/database/connecting.rb:26:in `adapter_class' /home/cloud/.rvm/gems/ruby-2.2.1/gems/sequel-4.23.0/lib/sequel/database/connecting.rb:55:in `connect' /home/cloud/.rvm/gems/ruby-2.2.1/gems/sequel-4.23.0/lib/sequel/core.rb:95:in `connect' /home/cloud/paralela/ws.rb:12:in `<top (required)>' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application.rb:218:in `load' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application.rb:218:in `start_load' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application.rb:297:in `start' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:151:in `block (2 levels) in start_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:150:in `fork' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:150:in `block in start_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:149:in `each' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:149:in `start_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/controller.rb:66:in `run' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons.rb:144:in `block in run' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/cmdline.rb:88:in `call' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/cmdline.rb:88:in `catch_exceptions' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons.rb:143:in `run' server.rb:3:in `<main>' E, [2015-07-07T11:15:32.491328 #21491] ERROR -- : cannot load such file -- pg (LoadError)
/home/cloud/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' /home/cloud/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' /home/cloud/paralela/ws.rb:8:in `<top (required)>' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application.rb:218:in `load' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application.rb:218:in `start_load' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application.rb:297:in `start' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:151:in `block (2 levels) in start_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:150:in `fork' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:150:in `block in start_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:149:in `each' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/application_group.rb:149:in `start_all' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/controller.rb:66:in `run' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons.rb:144:in `block in run' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/cmdline.rb:88:in `call' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons/cmdline.rb:88:in `catch_exceptions' /home/cloud/.rvm/gems/ruby-2.2.1/gems/daemons-1.2.2/lib/daemons.rb:143:in `run' server.rb:3:in `<main>'