no implicit conversion of nil into String (TypeError)

[sschepens]

I'm getting a lot of this errors sin updating to moped2/mongoid4:

no implicit conversion of nil into String (TypeError)
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/tcp.rb:20:in `initialize'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/tcp.rb:20:in `block in initialize'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:119:in `handle_socket_errors'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/tcp.rb:20:in `initialize'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:145:in `new'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:145:in `block in connect'
/usr/local/rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/timeout.rb:82:in `block in timeout'
/usr/local/rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/timeout.rb:70:in `catch'
/usr/local/rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/timeout.rb:70:in `timeout'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:144:in `connect'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection.rb:52:in `connect'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:531:in `connect'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:179:in `block in ensure_connected'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:115:in `block in connection'
vendor/bundle/ruby/2.1.0/gems/connection_pool-2.0.0/lib/connection_pool.rb:58:in `with'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:114:in `connection'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:177:in `ensure_connected'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:589:in `block in flush'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:617:in `block in logging'
vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.2/lib/active_support/notifications.rb:159:in `block in instrument'
vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.2/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.2/lib/active_support/notifications.rb:159:in `instrument'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/instrumentable.rb:31:in `instrument'
vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:616:in `logging

[papayaah]

getting the same issue here:

Unexpected error while processing request: no implicit conversion of nil into String
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/protocol/commands/authenticate.rb:35:in `+'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/protocol/commands/authenticate.rb:35:in `digest'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/protocol/commands/authenticate.rb:47:in `build_auth_command'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/protocol/commands/authenticate.rb:25:in `initialize'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/node.rb:502:in `new'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/node.rb:502:in `login'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/node.rb:57:in `block in apply_auth'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/node.rb:56:in `each'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/node.rb:56:in `apply_auth'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/cluster.rb:251:in `with_secondary'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/session/context.rb:104:in `with_node'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/session/context.rb:50:in `command'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/database.rb:76:in `command'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/moped-1.5.2/lib/moped/query.rb:38:in `count'
    /Users/davidang/.rvm/gems/ruby-2.1.0/gems/mongoid-3.1.6/lib/mongoid/persistence.rb:307:in `delete_all'

[leemhenson]

Us too:

2014-07-03T12:19:10.061413+00:00 app[web.1]: TypeError (no implicit conversion of nil into String):
2014-07-03T12:19:10.061414+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/tcp.rb:20:in `initialize'
2014-07-03T12:19:10.061417+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/tcp.rb:20:in `block in initialize'
2014-07-03T12:19:10.061418+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:119:in `handle_socket_errors'
2014-07-03T12:19:10.061420+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/tcp.rb:20:in `initialize'
2014-07-03T12:19:10.061421+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:145:in `new'
2014-07-03T12:19:10.061422+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:145:in `block in connect'
2014-07-03T12:19:10.061424+00:00 app[web.1]:   vendor/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:91:in `block in timeout'
2014-07-03T12:19:10.061425+00:00 app[web.1]:   vendor/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:35:in `block in catch'
2014-07-03T12:19:10.061426+00:00 app[web.1]:   vendor/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:35:in `catch'
2014-07-03T12:19:10.061427+00:00 app[web.1]:   vendor/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:35:in `catch'
2014-07-03T12:19:10.061429+00:00 app[web.1]:   vendor/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:106:in `timeout'
2014-07-03T12:19:10.061430+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:144:in `connect'
2014-07-03T12:19:10.061431+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection.rb:52:in `connect'
2014-07-03T12:19:10.061433+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:531:in `connect'
2014-07-03T12:19:10.061435+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:179:in `block in ensure_connected'
2014-07-03T12:19:10.061436+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:115:in `block in connection'
2014-07-03T12:19:10.061437+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/connection_pool-2.0.0/lib/connection_pool.rb:58:in `with'
2014-07-03T12:19:10.061439+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:114:in `connection'
2014-07-03T12:19:10.061440+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:177:in `ensure_connected'
2014-07-03T12:19:10.061441+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:589:in `block in flush'
2014-07-03T12:19:10.061442+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:617:in `block in logging'
2014-07-03T12:19:10.061443+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/notifications.rb:159:in `block in instrument'
2014-07-03T12:19:10.061445+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
2014-07-03T12:19:10.061446+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/notifications.rb:159:in `instrument'
2014-07-03T12:19:10.061447+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/instrumentable.rb:31:in `instrument'
2014-07-03T12:19:10.061449+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:616:in `logging'
2014-07-03T12:19:10.061450+00:00 app[web.1]:   engines/music_glue/lib/newrelic_moped/instrumentation.rb:39:in `block in logging_with_newrelic_trace'
2014-07-03T12:19:10.061463+00:00 app[web.1]:   engines/music_glue/lib/newrelic_moped/instrumentation.rb:56:in `call'
2014-07-03T12:19:10.061464+00:00 app[web.1]:   engines/music_glue/lib/newrelic_moped/instrumentation.rb:56:in `logging_with_newrelic_trace'
2014-07-03T12:19:10.061466+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:587:in `flush'
2014-07-03T12:19:10.061467+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:391:in `process'
2014-07-03T12:19:10.061468+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/operation/read.rb:48:in `execute'
2014-07-03T12:19:10.061469+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:648:in `read'
2014-07-03T12:19:10.061471+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:90:in `command'
2014-07-03T12:19:10.061472+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:432:in `refresh'
2014-07-03T12:19:10.061473+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/cluster.rb:182:in `block in refresh'
2014-07-03T12:19:10.061475+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/cluster.rb:194:in `each'
2014-07-03T12:19:10.061476+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/cluster.rb:194:in `refresh'
2014-07-03T12:19:10.061477+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/cluster.rb:151:in `nodes'
2014-07-03T12:19:10.061478+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/cluster.rb:240:in `with_primary'
2014-07-03T12:19:10.061479+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/read_preference/primary.rb:55:in `block in with_node'
2014-07-03T12:19:10.061481+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/read_preference/selectable.rb:65:in `call'
2014-07-03T12:19:10.061482+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/read_preference/selectable.rb:65:in `with_retry'
2014-07-03T12:19:10.061483+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/read_preference/primary.rb:54:in `with_node'
2014-07-03T12:19:10.061485+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/query.rb:127:in `first'
2014-07-03T12:19:10.061489+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/query_cache.rb:187:in `block in first_with_cache'
2014-07-03T12:19:10.061491+00:00 app[web.1]:   engines/music_glue/lib/music_glue/monkey_patches/mongoid_query_cache.rb:15:in `with_cache'
2014-07-03T12:19:10.061492+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/query_cache.rb:186:in `first_with_cache'
2014-07-03T12:19:10.061493+00:00 app[web.1]:   engines/music_glue/lib/music_glue/healthcheck.rb:30:in `block in mongo_check'
2014-07-03T12:19:10.061494+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/session.rb:369:in `with'
2014-07-03T12:19:10.061495+00:00 app[web.1]:   engines/music_glue/lib/music_glue/healthcheck.rb:29:in `mongo_check'
2014-07-03T12:19:10.061497+00:00 app[web.1]:   engines/music_glue/lib/music_glue/healthcheck.rb:19:in `call'
2014-07-03T12:19:10.061499+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/newrelic_rpm-3.7.3.204/lib/new_relic/agent/instrumentation/rack.rb:80:in `block in call_with_newrelic'
2014-07-03T12:19:10.061501+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/newrelic_rpm-3.
7.3.204/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:335:in `perform_action_with_newrelic_trace'
2014-07-03T12:19:10.061502+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/newrelic_rpm-3.7.3.204/lib/new_relic/agent/instrumentation/rack.rb:79:in `call_with_newrelic'
2014-07-03T12:19:10.061504+00:00 app[web.1]:   engines/music_glue/lib/music_glue/healthcheck.rb:7:in `call'
2014-07-03T12:19:10.061505+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/journey/router.rb:71:in `block in call'
2014-07-03T12:19:10.061506+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/journey/router.rb:59:in `each'
2014-07-03T12:19:10.061507+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/journey/router.rb:59:in `call'
2014-07-03T12:19:10.061509+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/routing/route_set.rb:676:in `call'
2014-07-03T12:19:10.061510+00:00 app[web.1]:   engines/music_glue/lib/music_glue/middleware/lock_session_ip.rb:36:in `pass'
2014-07-03T12:19:10.061511+00:00 app[web.1]:   engines/music_glue/lib/music_glue/middleware/lock_session_ip.rb:11:in `call'
2014-07-03T12:19:10.061512+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/warden-1.2.3/lib/warden/manager.rb:35:in `block in call'
2014-07-03T12:19:10.061514+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `catch'
2014-07-03T12:19:10.061515+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/warden-1.2.3/lib/warden/manager.rb:34:in `call'
2014-07-03T12:19:10.061516+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/omniauth-1.1.4/lib/omniauth/strategy.rb:184:in `call!'
2014-07-03T12:19:10.061517+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/omniauth-1.1.4/lib/omniauth/strategy.rb:164:in `call'
2014-07-03T12:19:10.061519+00:00 app[web.1]:   engines/music_glue/config/initializers/omniauth.rb:6:in `call_with_error_handling'
2014-07-03T12:19:10.061520+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/omniauth-1.1.4/lib/omniauth/strategy.rb:184:in `call!'
2014-07-03T12:19:10.061521+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/omniauth-1.1.4/lib/omniauth/strategy.rb:164:in `call'
2014-07-03T12:19:10.061522+00:00 app[web.1]:   engines/music_glue/config/initializers/omniauth.rb:6:in `call_with_error_handling'
2014-07-03T12:19:10.061524+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/omniauth-1.1.4/lib/omniauth/builder.rb:49:in `call'
2014-07-03T12:19:10.061525+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/query_cache.rb:104:in `block in call'
2014-07-03T12:19:10.061527+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/query_cache.rb:69:in `cache'
2014-07-03T12:19:10.061528+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/query_cache.rb:104:in `call'
2014-07-03T12:19:10.061529+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/newrelic_rpm-3.7.3.204/lib/new_relic/rack/error_collector.rb:55:in `call'
2014-07-03T12:19:10.061530+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/newrelic_rpm-3.7.3.204/lib/new_relic/rack/agent_hooks.rb:32:in `call'
2014-07-03T12:19:10.061532+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/newrelic_rpm-3.7.3.204/lib/new_relic/rack/browser_monitoring.rb:27:in `call'
2014-07-03T12:19:10.061533+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/bundler/gems/client_side_validations-0db547f7c1e4/lib/client_side_validations/middleware.rb:17:in `call'
2014-07-03T12:19:10.061534+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/rack-1.5.2/lib/rack/etag.rb:23:in `call'
2014-07-03T12:19:10.061536+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/rack-1.5.2/lib/rack/conditionalget.rb:25:in `call'
2014-07-03T12:19:10.061537+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/rack-1.5.2/lib/rack/head.rb:11:in `call'
2014-07-03T12:19:10.061538+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/params_parser.rb:27:in `call'
2014-07-03T12:19:10.061539+00:00 app[web.1]:   engines/music_glue/lib/music_glue/middleware/force_request_encoding.rb:12:in `call'
2014-07-03T12:19:10.061540+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/flash.rb:254:in `call'
2014-07-03T12:19:10.061542+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/rack-1.5.2/lib/rack/session/abstract/id.rb:225:in `context'
2014-07-03T12:19:10.061543+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/rack-1.5.2/lib/rack/session/abstract/id.rb:220:in `call'
2014-07-03T12:19:10.061544+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/cookies.rb:560:in `call'
2014-07-03T12:19:10.061549+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
2014-07-03T12:19:10.061550+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/callbacks.rb:82:in `run_callbacks'
2014-07-03T12:19:10.061551+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
2014-07-03T12:19:10.061552+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
2014-07-03T12:19:10.061554+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/airbrake-4.0.0/lib/airbrake/rails/middleware.rb:13:in `call'
2014-07-03T12:19:10.061555+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
2014-07-03T12:19:10.061556+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
2014-07-03T12:19:10.061557+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/railties-4.1.1/lib/rails/rack/logger.rb:38:in `call_app'
2014-07-03T12:19:10.061559+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/railties-4.1.1/lib/rails/rack/logger.rb:20:in `block in call'
2014-07-03T12:19:10.061567+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/tagged_logging.rb:68:in `block in tagged'
2014-07-03T12:19:10.061570+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/tagged_logging.rb:26:in `tagged'
2014-07-03T12:19:10.061571+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/tagged_logging.rb:68:in `tagged'
2014-07-03T12:19:10.061572+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/railties-4.1.1/lib/rails/rack/logger.rb:20:in `call'
2014-07-03T12:19:10.061574+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/request_id.rb:21:in `call'
2014-07-03T12:19:10.061575+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/rack-1.5.2/lib/rack/methodoverride.rb:21:in `call'
2014-07-03T12:19:10.061576+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/rack-1.5.2/lib/rack/runtime.rb:17:in `call'
2014-07-03T12:19:10.061578+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
2014-07-03T12:19:10.061579+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/static.rb:64:in `call'
2014-07-03T12:19:10.061580+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/bundler/gems/font_assets-61d73f708510/lib/font_assets/middleware.rb:33:in `__call'
2014-07-03T12:19:10.061582+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/bundler/gems/font_assets-61d73f708510/lib/font_assets/middleware.rb:24:in `call'
2014-07-03T12:19:10.061583+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/ssl.rb:24:in `call'
2014-07-03T12:19:10.061584+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/airbrake-4.0.0/lib/airbrake/user_informer.rb:16:in `_call'
2014-07-03T12:19:10.061586+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/airbrake-4.0.0/lib/airbrake/user_informer.rb:12:in `call'
2014-07-03T12:19:10.061587+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/railties-4.1.1/lib/rails/engine.rb:514:in `call'
2014-07-03T12:19:10.061588+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/railties-4.1.1/lib/rails/application.rb:144:in `call'
2014-07-03T12:19:10.061589+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/railties-4.1.1/lib/rails/railtie.rb:194:in `public_send'
2014-07-03T12:19:10.061591+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/railties-4.1.1/lib/rails/railtie.rb:194:in `method_missing'
2014-07-03T12:19:10.061592+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/rack-1.5.2/lib/rack/deflater.rb:25:in `call'
2014-07-03T12:19:10.061593+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/puma-2.8.2/lib/puma/configuration.rb:71:in `call'
2014-07-03T12:19:10.061594+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/puma-2.8.2/lib/puma/server.rb:490:in `handle_request'
2014-07-03T12:19:10.061595+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/puma-2.8.2/lib/puma/server.rb:361:in `process_client'
2014-07-03T12:19:10.061596+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/puma-2.8.2/lib/puma/server.rb:254:in `block in run'
2014-07-03T12:19:10.061598+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/puma-2.8.2/lib/puma/thread_pool.rb:92:in `call'
2014-07-03T12:19:10.061599+00:00 app[web.1]:   vendor/bundle/ruby/2.1.0/gems/puma-2.8.2/lib/puma/thread_pool.rb:92:in `block in spawn_thread'
2014-07-03T12:19:10.061600+00:00 app[web.1]:
2014-07-03T12:19:10.061601+00:00 app[web.1]:
2014-07-03T12:19:10.076742+00:00 app[web.1]:   Rendered vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/templates/rescues/_source.erb (0.9ms)
2014-07-03T12:19:10.088275+00:00 app[web.1]:   Rendered vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.6ms)
2014-07-03T12:19:10.088380+00:00 app[web.1]:   Rendered vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.1/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (17.1ms)

[malconis]

It's happening on our project as well. Has anyone found a decent work around? It happens intermittently and it's proving impossible for me to replicate.

[ghg]

Hi,

Any updates on this? We are also running into the same issue.

Thanks!

[chrisckchang]

+1

[corny]

Our project is affected by this bug as well. We are using Ruby 2.1.2 with Moped 2.0.0 and Rails 4.1.4.

[jacquescrocker]

also seeing this issue

TypeError: no implicit conversion of nil into String
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/connection/socket/tcp.rb", line 20, in initialize
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/connection/socket/tcp.rb", line 20, in block in initialize
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/connection/socket/connectable.rb", line 119, in handle_socket_errors
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/connection/socket/tcp.rb", line 20, in initialize
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/connection/socket/connectable.rb", line 145, in new
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/connection/socket/connectable.rb", line 145, in block in connect
  File "/app/vendor/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb", line 91, in block in timeout
  File "/app/vendor/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb", line 35, in block in catch
  File "/app/vendor/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb", line 35, in catch
  File "/app/vendor/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb", line 35, in catch
  File "/app/vendor/ruby-2.1.1/lib/ruby/2.1.0/timeout.rb", line 106, in timeout
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/connection/socket/connectable.rb", line 144, in connect
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/connection.rb", line 52, in connect
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 531, in connect
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 179, in block in ensure_connected
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 115, in block in connection
  File "/app/vendor/bundle/ruby/2.1.0/gems/connection_pool-2.0.0/lib/connection_pool.rb", line 58, in with
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 114, in connection
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 177, in ensure_connected
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 589, in block in flush
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 617, in block in logging
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/notifications.rb", line 159, in block in instrument
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/notifications/instrumenter.rb", line 20, in instrument
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/notifications.rb", line 159, in instrument
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/instrumentable.rb", line 31, in instrument
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 616, in logging
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 587, in flush
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 391, in process
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/operation/read.rb", line 48, in execute
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 648, in read
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 90, in command
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/node.rb", line 432, in refresh
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/cluster.rb", line 182, in block in refresh
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/cluster.rb", line 194, in each
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/cluster.rb", line 194, in refresh
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/cluster.rb", line 151, in nodes
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/cluster.rb", line 240, in with_primary
  File "/app/vendor/bundle/ruby/2.1.0/gems/moped-2.0.0.rc1/lib/moped/collection.rb", line 124, in insert
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/query_cache.rb", line 117, in insert_with_clear_cache
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/persistable/creatable.rb", line 79, in insert_as_root
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/persistable/creatable.rb", line 27, in block in insert
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/persistable/creatable.rb", line 117, in block (2 levels) in prepare_insert
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/callbacks.rb", line 113, in call
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/callbacks.rb", line 113, in call
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/callbacks.rb", line 166, in block in halting
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/callbacks.rb", line 166, in call
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/callbacks.rb", line 166, in block in halting
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/callbacks.rb", line 86, in call
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/callbacks.rb", line 86, in run_callbacks
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/interceptable.rb", line 138, in run_callbacks
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/persistable/creatable.rb", line 116, in block in prepare_insert
  File "/app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.1/lib/active_support/callbacks.rb", line 82, in run_callbacks
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/interceptable.rb", line 138, in run_callbacks
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/persistable/creatable.rb", line 115, in prepare_insert
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/persistable/creatable.rb", line 23, in insert
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/persistable/creatable.rb", line 179, in block in create!
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/threaded/lifecycle.rb", line 156, in _creating
  File "/app/vendor/bundle/ruby/2.1.0/gems/mongoid-4.0.0.beta1/lib/mongoid/persistable/creatable.rb", line 174, in create!
  File "/app/app/controllers/webhooks/webhooks_controller.rb", line 35,

is this a mongodb server problem? cant tell why that would be nil. i did check and the server seems to be up, though i'm using mongohq elastic and they do replica sets or something

[arthurnn]

How is this happening?
Anyone can write a script or app, to help me simulate this?

thanks

[papayaah]

my issue earlier was that I had a malformed YML settings.

[vovimayhem]

I've seen this happen on one of the apps I'm working on... seems to happen after a couple of days.

The first time I saw it was when we migrated to ruby 2.1.2 (from ruby 2.1.1, due to issues with the garbage collector)

Currently running:

• Ruby MRI 2.1.2
• Rails 4.1.4
• Mongoid 4.0.0 (not beta, not rc)

[rlupiichuk]

+1 we see this as well.

We're using:

• ruby 2.1.2p95
• mongoid 4.0.0
• Rails rails 4.1.2
• PhusionPassenger

For us, it usually happens after 2-3 days of running.

TypeError (no implicit conversion of nil into String):
  moped (2.0.0) lib/moped/connection/socket/tcp.rb:20:in `initialize'
  moped (2.0.0) lib/moped/connection/socket/tcp.rb:20:in `block in initialize'
  moped (2.0.0) lib/moped/connection/socket/connectable.rb:119:in `handle_socket_errors'
  moped (2.0.0) lib/moped/connection/socket/tcp.rb:20:in `initialize'
  moped (2.0.0) lib/moped/connection/socket/connectable.rb:145:in `new'
  moped (2.0.0) lib/moped/connection/socket/connectable.rb:145:in `block in connect'
  /usr/local/lib/ruby/2.1.0/timeout.rb:91:in `block in timeout'
  /usr/local/lib/ruby/2.1.0/timeout.rb:35:in `block in catch'
  /usr/local/lib/ruby/2.1.0/timeout.rb:35:in `catch'
  /usr/local/lib/ruby/2.1.0/timeout.rb:35:in `catch'
  /usr/local/lib/ruby/2.1.0/timeout.rb:106:in `timeout'
  moped (2.0.0) lib/moped/connection/socket/connectable.rb:144:in `connect'
  moped (2.0.0) lib/moped/connection.rb:52:in `connect'
  moped (2.0.0) lib/moped/node.rb:531:in `connect'
  moped (2.0.0) lib/moped/node.rb:179:in `block in ensure_connected'
  moped (2.0.0) lib/moped/node.rb:115:in `block in connection'
  connection_pool (2.0.0) lib/connection_pool.rb:58:in `with'
  moped (2.0.0) lib/moped/node.rb:114:in `connection'
  moped (2.0.0) lib/moped/node.rb:177:in `ensure_connected'
  moped (2.0.0) lib/moped/node.rb:589:in `block in flush'
  moped (2.0.0) lib/moped/node.rb:617:in `block in logging'
  activesupport (4.1.2) lib/active_support/notifications.rb:159:in `block in instrument'
  activesupport (4.1.2) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.1.2) lib/active_support/notifications.rb:159:in `instrument'
  moped (2.0.0) lib/moped/instrumentable.rb:31:in `instrument'
  moped (2.0.0) lib/moped/node.rb:616:in `logging'
  moped (2.0.0) lib/moped/node.rb:587:in `flush'
  moped (2.0.0) lib/moped/node.rb:391:in `process'
  moped (2.0.0) lib/moped/operation/read.rb:48:in `execute'
  moped (2.0.0) lib/moped/node.rb:648:in `read'
  moped (2.0.0) lib/moped/node.rb:90:in `command'
  moped (2.0.0) lib/moped/node.rb:432:in `refresh'
  moped (2.0.0) lib/moped/cluster.rb:182:in `block in refresh'
  moped (2.0.0) lib/moped/cluster.rb:368:in `call'
  moped (2.0.0) lib/moped/cluster.rb:368:in `block in refresh_peers'
  moped (2.0.0) lib/moped/cluster.rb:367:in `each'
  moped (2.0.0) lib/moped/cluster.rb:367:in `refresh_peers'
  moped (2.0.0) lib/moped/cluster.rb:187:in `block in refresh'
  moped (2.0.0) lib/moped/cluster.rb:194:in `each'
  moped (2.0.0) lib/moped/cluster.rb:194:in `refresh'
  moped (2.0.0) lib/moped/cluster.rb:151:in `nodes'
  moped (2.0.0) lib/moped/cluster.rb:240:in `with_primary'
  moped (2.0.0) lib/moped/read_preference/primary.rb:55:in `block in with_node'
  moped (2.0.0) lib/moped/read_preference/selectable.rb:65:in `call'
  moped (2.0.0) lib/moped/read_preference/selectable.rb:65:in `with_retry'
  moped (2.0.0) lib/moped/read_preference/primary.rb:54:in `with_node'
  moped (2.0.0) lib/moped/query.rb:127:in `first'
  mongoid (4.0.0) lib/mongoid/query_cache.rb:187:in `block in first_with_cache'
  mongoid (4.0.0) lib/mongoid/query_cache.rb:135:in `with_cache'
  mongoid (4.0.0) lib/mongoid/query_cache.rb:186:in `first_with_cache'
  mongoid (4.0.0) lib/mongoid/contextual/mongo.rb:199:in `block (2 levels) in first'
  mongoid (4.0.0) lib/mongoid/contextual/mongo.rb:535:in `with_sorting'
  mongoid (4.0.0) lib/mongoid/contextual/mongo.rb:198:in `block in first'
  mongoid (4.0.0) lib/mongoid/contextual/mongo.rb:447:in `try_cache'
  mongoid (4.0.0) lib/mongoid/contextual/mongo.rb:197:in `first'
  mongoid (4.0.0) lib/mongoid/contextual.rb:20:in `first'
  mongoid (4.0.0) lib/mongoid/criteria/modifiable.rb:188:in `find_or'
  mongoid (4.0.0) lib/mongoid/criteria/modifiable.rb:68:in `find_or_create_by'
  mongoid (4.0.0) lib/mongoid/findable.rb:15:in `find_or_create_by'
  character (1.0.0) lib/character/settings.rb:68:in `stored_object'
  character (1.0.0) lib/character/settings.rb:72:in `value'
  character (1.0.0) lib/character/settings.rb:12:in `value'
  character (1.0.0) app/controllers/concerns/website_settings.rb:8:in `set_website_settings'
  activesupport (4.1.2) lib/active_support/callbacks.rb:424:in `block in make_lambda'
  activesupport (4.1.2) lib/active_support/callbacks.rb:160:in `call'
  activesupport (4.1.2) lib/active_support/callbacks.rb:160:in `block in halting'
  activesupport (4.1.2) lib/active_support/callbacks.rb:229:in `call'
  activesupport (4.1.2) lib/active_support/callbacks.rb:229:in `block in halting'
  activesupport (4.1.2) lib/active_support/callbacks.rb:166:in `call'
  activesupport (4.1.2) lib/active_support/callbacks.rb:166:in `block in halting'
  activesupport (4.1.2) lib/active_support/callbacks.rb:166:in `call'
  activesupport (4.1.2) lib/active_support/callbacks.rb:166:in `block in halting'
  activesupport (4.1.2) lib/active_support/callbacks.rb:166:in `call'
  activesupport (4.1.2) lib/active_support/callbacks.rb:166:in `block in halting'
  activesupport (4.1.2) lib/active_support/callbacks.rb:86:in `call'
  activesupport (4.1.2) lib/active_support/callbacks.rb:86:in `run_callbacks'
  actionpack (4.1.2) lib/abstract_controller/callbacks.rb:19:in `process_action'
  actionpack (4.1.2) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (4.1.2) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
  activesupport (4.1.2) lib/active_support/notifications.rb:159:in `block in instrument'
  activesupport (4.1.2) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.1.2) lib/active_support/notifications.rb:159:in `instrument'
  actionpack (4.1.2) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
  actionpack (4.1.2) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
  actionpack (4.1.2) lib/abstract_controller/base.rb:136:in `process'
  actionview (4.1.2) lib/action_view/rendering.rb:30:in `process'
  actionpack (4.1.2) lib/action_controller/metal.rb:196:in `dispatch'
  actionpack (4.1.2) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.1.2) lib/action_controller/metal.rb:232:in `block in action'
  actionpack (4.1.2) lib/action_dispatch/routing/route_set.rb:82:in `call'
  actionpack (4.1.2) lib/action_dispatch/routing/route_set.rb:82:in `dispatch'
  actionpack (4.1.2) lib/action_dispatch/routing/route_set.rb:50:in `call'
  actionpack (4.1.2) lib/action_dispatch/journey/router.rb:71:in `block in call'
  actionpack (4.1.2) lib/action_dispatch/journey/router.rb:59:in `each'
  actionpack (4.1.2) lib/action_dispatch/journey/router.rb:59:in `call'
  actionpack (4.1.2) lib/action_dispatch/routing/route_set.rb:678:in `call'
  rack (1.5.2) lib/rack/etag.rb:23:in `call'
  rack (1.5.2) lib/rack/conditionalget.rb:25:in `call'
  rack (1.5.2) lib/rack/head.rb:11:in `call'
  actionpack (4.1.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.1.2) lib/action_dispatch/middleware/flash.rb:254:in `call'
  rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.1.2) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  actionpack (4.1.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.1.2) lib/active_support/callbacks.rb:82:in `run_callbacks'
  actionpack (4.1.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.1.2) lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
  actionpack (4.1.2) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
  actionpack (4.1.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.1.2) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.1.2) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.1.2) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.1.2) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.1.2) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.1.2) lib/rails/rack/logger.rb:20:in `call'
  actionpack (4.1.2) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
  rack (1.5.2) lib/rack/runtime.rb:17:in `call'
  activesupport (4.1.2) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
  rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
  railties (4.1.2) lib/rails/engine.rb:514:in `call'
  railties (4.1.2) lib/rails/application.rb:144:in `call'
  passenger (4.0.42) lib/phusion_passenger/rack/thread_handler_extension.rb:74:in `process_request'
  passenger (4.0.42) lib/phusion_passenger/request_handler/thread_handler.rb:141:in `accept_and_process_next_request'
  passenger (4.0.42) lib/phusion_passenger/request_handler/thread_handler.rb:109:in `main_loop'
  passenger (4.0.42) lib/phusion_passenger/request_handler.rb:448:in `block (3 levels) in start_threads'

[jacquescrocker]

i have no idea how to replicate this, however I was seeing 1,000 of these exceptions reported a day on production

it is using replica sets via mongohq, so there might be some kind of screwed up handling

i'm doing a trial run just using a single server mongodb database setup (with no failover) to see if the errors happen then

let me know if I can do anything to help debug this issue. I've only ever seen it on production, and it seems to happen non-deterministically (some hours i'll get 300 errors, other hours none)

[danielevans]

@mickeyren Your stack trace is different from the others listed here. Yours is caused by a nil username or password.

[papayaah]

@danielevans yes. It was caused by a malformed database yml

[fabiob]

Same here, running:

• ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]
• mongoid 4.0.0
• moped 2.0.0
• 2 sidekiq 3.2.2 processes with 25 threads each
• 3 puma 2.9.0 processes with 16 threads each
• a MongoHQ elastic deployment, with replica sets

Error Class
TypeError

Error Message
no implicit conversion of nil into String

Error Backtrace
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/tcp.rb:20:in `initialize'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/tcp.rb:20:in `block in initialize'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:119:in `handle_socket_errors'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/tcp.rb:20:in `initialize'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:145:in `new'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:145:in `block in connect'
/usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:91:in `block in timeout'
/usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:35:in `block in catch'
/usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:35:in `catch'
/usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:35:in `catch'
/usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:106:in `timeout'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection/socket/connectable.rb:144:in `connect'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/connection.rb:52:in `connect'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:531:in `connect'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:179:in `block in ensure_connected'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:115:in `block in connection'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/connection_pool-2.0.0/lib/connection_pool.rb:58:in `with'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:114:in `connection'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:177:in `ensure_connected'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:589:in `block in flush'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:617:in `block in logging'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/activesupport-4.0.8/lib/active_support/notifications.rb:159:in `block in instrument'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/activesupport-4.0.8/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/activesupport-4.0.8/lib/active_support/notifications.rb:159:in `instrument'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/instrumentable.rb:31:in `instrument'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:616:in `logging'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:587:in `flush'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:391:in `process'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/operation/read.rb:48:in `execute'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:648:in `read'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:90:in `command'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/node.rb:432:in `refresh'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/cluster.rb:182:in `block in refresh'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/cluster.rb:194:in `each'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/cluster.rb:194:in `refresh'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/read_preference/selectable.rb:70:in `rescue in with_retry'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/read_preference/selectable.rb:64:in `with_retry'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/read_preference/primary.rb:54:in `with_node'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/moped-2.0.0/lib/moped/query.rb:127:in `first'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/query_cache.rb:187:in `block in first_with_cache'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/query_cache.rb:135:in `with_cache'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/query_cache.rb:186:in `first_with_cache'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/contextual/mongo.rb:199:in `block (2 levels) in first'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/contextual/mongo.rb:535:in `with_sorting'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/contextual/mongo.rb:198:in `block in first'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/contextual/mongo.rb:447:in `try_cache'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/contextual/mongo.rb:197:in `first'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/contextual.rb:20:in `first'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/criteria/modifiable.rb:188:in `find_or'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/criteria/modifiable.rb:97:in `find_or_initialize_by'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/mongoid-4.0.0/lib/mongoid/findable.rb:15:in `find_or_initialize_by'
/apps/consyste/releases/20140818022851/app/workers/indexa_documento_worker.rb:15:in `perform'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/processor.rb:52:in `block (2 levels) in process'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/chain.rb:122:in `call'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/chain.rb:122:in `block in invoke'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/newrelic_rpm-3.9.1.236/lib/new_relic/agent/instrumentation/sidekiq.rb:33:in `block in call'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/newrelic_rpm-3.9.1.236/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:364:in `perform_action_with_newrelic_trace'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/newrelic_rpm-3.9.1.236/lib/new_relic/agent/instrumentation/sidekiq.rb:29:in `call'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/chain.rb:124:in `block in invoke'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/server/active_record.rb:6:in `call'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/chain.rb:124:in `block in invoke'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/server/retry_jobs.rb:73:in `call'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/chain.rb:124:in `block in invoke'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/server/logging.rb:11:in `block in call'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/logging.rb:22:in `with_context'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/server/logging.rb:7:in `call'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/chain.rb:124:in `block in invoke'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/chain.rb:127:in `call'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/middleware/chain.rb:127:in `invoke'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/processor.rb:51:in `block in process'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/processor.rb:94:in `stats'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/sidekiq-3.2.2/lib/sidekiq/processor.rb:50:in `process'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/celluloid-0.15.2/lib/celluloid/calls.rb:25:in `public_send'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/celluloid-0.15.2/lib/celluloid/calls.rb:25:in `dispatch'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/celluloid-0.15.2/lib/celluloid/calls.rb:122:in `dispatch'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/celluloid-0.15.2/lib/celluloid/actor.rb:322:in `block in handle_message'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/celluloid-0.15.2/lib/celluloid/actor.rb:416:in `block in task'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/celluloid-0.15.2/lib/celluloid/tasks.rb:55:in `block in initialize'
/apps/consyste/shared/bundle/ruby/2.1.0/gems/celluloid-0.15.2/lib/celluloid/tasks/task_fiber.rb:13:in `block in create'