Intermittent NotFound errors in choose_metric action

[danielkza]

Sometimes selecting a Metric in the metric addition page leads to 404s. Me and @dread-uo noticed that in mezuro.org, but the error disappeared by itself after a few minutes.

Excerpt from the mezuro.org logs (the configuration with id 16 does exist):

Started GET "/pt/kalibro_configurations/16/metric_configurations/choose_metric" for 143.107.45.24 at 2016-04-08 14:28:04 -0300
I, [2016-04-08T14:28:04.314611 #3781]  INFO -- : Processing by MetricConfigurationsController#choose_metric as JS
I, [2016-04-08T14:28:04.314748 #3781]  INFO -- :   Parameters: {"locale"=>"pt", "kalibro_configuration_id"=>"16"}
I, [2016-04-08T14:28:04.318236 #18932]  INFO -- : Started POST "/pt/kalibro_configurations/16/metric_configurations/new" for 143.107.45.24 at 2016-04-08 14:28:04 -0300
D, [2016-04-08T14:28:04.318876 #3781] DEBUG -- :   User Load (1.4ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1  ORDER BY "users"."id" ASC LIMIT 1  [["id", 40]]
I, [2016-04-08T14:28:04.322068 #18932]  INFO -- : Processing by MetricConfigurationsController#new as HTML
I, [2016-04-08T14:28:04.322276 #18932]  INFO -- :   Parameters: {"utf8"=>"<E2><9C><93>", "authenticity_token"=>"HztAGFuplgGXXWvOekLrsFt1hlKl+6QwDBgV3FNkrkbIQ4Z8N1Svq2aJL/wbEyBoRw+FCL2+DSH4Ec35R93r3A==", "metric_
collector_name"=>"Analizo", "metric_code"=>"cbo", "locale"=>"pt", "kalibro_configuration_id"=>"16"}
D, [2016-04-08T14:28:04.327423 #18932] DEBUG -- :   User Load (2.2ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1  ORDER BY "users"."id" ASC LIMIT 1  [["id", 40]]
D, [2016-04-08T14:28:04.330216 #3781] DEBUG -- :   KalibroConfigurationAttributes Load (3.0ms)  SELECT  "kalibro_configuration_attributes".* FROM "kalibro_configuration_attributes" WHERE "kalibro_configuration_a
ttributes"."user_id" = $1 AND "kalibro_configuration_attributes"."kalibro_configuration_id" = $2 LIMIT 1  [["user_id", 40], ["kalibro_configuration_id", 16]]
D, [2016-04-08T14:28:04.332715 #18932] DEBUG -- :   KalibroConfigurationAttributes Load (0.6ms)  SELECT  "kalibro_configuration_attributes".* FROM "kalibro_configuration_attributes" WHERE "kalibro_configuration_
attributes"."user_id" = $1 AND "kalibro_configuration_attributes"."kalibro_configuration_id" = $2 LIMIT 1  [["user_id", 40], ["kalibro_configuration_id", 16]]
D, [2016-04-08T14:28:04.350005 #18932] DEBUG -- :   ReadingGroupAttributes Load (0.6ms)  SELECT "reading_group_attributes".* FROM "reading_group_attributes" WHERE "reading_group_attributes"."public" = $1  [["pub
lic", "t"]]
D, [2016-04-08T14:28:04.351271 #18932] DEBUG -- :   ReadingGroupAttributes Load (0.6ms)  SELECT "reading_group_attributes".* FROM "reading_group_attributes" WHERE "reading_group_attributes"."user_id" = $1 AND "reading_group_attributes"."public" = $2  [["user_id", 40], ["public", "f"]]
I, [2016-04-08T14:28:05.968254 #18932]  INFO -- :   Rendered public/404.html (0.1ms)
I, [2016-04-08T14:28:05.968725 #18932]  INFO -- : Completed 404 Not Found in 1646ms (Views: 1.3ms | ActiveRecord: 3.9ms)