Merge pull request #75 from edx/feature/jsa/mongoid-retry

Fail fast when database is unreachable

Gemfile

@@ -18,7 +18,7 @@ gem 'ampex'
 
 gem 'mongo'
 gem 'moped', "1.5.1"
-gem 'mongoid', "~> 3.0"
+gem 'mongoid', "3.0.15"
 gem 'bson_ext'
 
 gem 'delayed_job'

Gemfile.lock

@@ -67,7 +67,7 @@ GEM
     bson (1.6.4)
     bson_ext (1.6.4)
       bson (~> 1.6.4)
-    builder (3.0.0)
+    builder (3.0.4)
     coderay (1.0.7)
     dalli (2.1.0)
     delayed_job (3.0.3)
@@ -83,7 +83,7 @@ GEM
       guard (>= 1.1)
     hashr (0.0.21)
     hike (1.2.1)
-    i18n (0.6.0)
+    i18n (0.6.9)
     journey (1.0.4)
     kgio (2.7.4)
     listen (0.5.0)
@@ -91,19 +91,19 @@ GEM
     mime-types (1.19)
     mongo (1.6.4)
       bson (~> 1.6.4)
-    mongoid (3.0.4)
+    mongoid (3.0.15)
       activemodel (~> 3.1)
       moped (~> 1.1)
       origin (~> 1.0)
       tzinfo (~> 0.3.22)
     moped (1.5.1)
-    multi_json (1.3.6)
+    multi_json (1.8.2)
     newrelic_moped (0.0.6)
       moped
       newrelic_rpm (~> 3.6.0)
     newrelic_rpm (3.6.8.164)
     nokogiri (1.5.5)
-    origin (1.0.6)
+    origin (1.1.0)
     pry (0.9.10)
       coderay (~> 1.0.5)
       method_source (~> 0.8)
@@ -154,7 +154,7 @@ GEM
       rest-client (~> 1.6)
     tire-contrib (0.1.1)
       tire
-    tzinfo (0.3.33)
+    tzinfo (0.3.38)
     unicorn (4.3.1)
       kgio (~> 2.6)
       rack
@@ -180,7 +180,7 @@ DEPENDENCIES
   guard-unicorn
   kaminari!
   mongo
-  mongoid (~> 3.0)
+  mongoid (= 3.0.15)
   mongoid-tree!
   mongoid_magic_counter_cache!
   mongoid_taggable_with_context!

config/mongoid.yml

@@ -11,48 +11,40 @@ test:
       hosts:
         - localhost:27017
 
-production:
-  sessions:
-    default:
+common: &default_session
   uri: <%= ENV['MONGOHQ_URL'] %>
   options:
     skip_version_check: true
     safe: true
     consistency: strong
+    max_retries: <%= ENV['MONGOID_MAX_RETRIES'] || 1 %>
+    retry_interval: <%= ENV['MONGOID_RETRY_INTERVAL'] || 0 %>
+    timeout: <%= ENV['MONGOID_TIMEOUT'] || 0.5 %>
+
+production:
+  sessions:
+    default:
+      <<: *default_session
 
 edgeprod:
   sessions:
     default:
-      uri: <%= ENV['MONGOHQ_URL'] %>
-      options:
-        skip_version_check: true
-        safe: true
-        consistency: strong
+      <<: *default_session
 
 edgestage:
   sessions:
     default:
-      uri: <%= ENV['MONGOHQ_URL'] %>
-      options:
-        skip_version_check: true
-        safe: true
-        consistency: strong
+      <<: *default_session
 
 staging:
   sessions:
     default:
-      uri: <%= ENV['MONGOHQ_URL'] %>
+      <<: *default_session
 
 loadtest:
   sessions:
     default:
-      uri: <%= ENV['MONGOHQ_URL'] %>
-      options:
-        skip_version_check: true
-        safe: true
-        consistency: strong
-        max_retries: 1
-        retry_interval: 1
+      <<: *default_session
 
 defaults: &defaults
   use_utc: false

config/unicorn.rb

@@ -2,6 +2,16 @@ worker_processes 4
 timeout 25
 preload_app true
 
+before_fork do |server, worker|
+  Signal.trap 'TERM' do
+    puts 'Unicorn master intercepting TERM and sending myself QUIT instead'
+    Process.kill 'QUIT', Process.pid
+  end
+end
+
 after_fork do |server, worker|
+  Signal.trap 'TERM' do
+    puts 'Unicorn worker intercepting TERM and doing nothing. Waiting for master to send QUIT'
+  end
   ::Mongoid.default_session.disconnect
 end

lib/helpers.rb

@@ -299,7 +299,7 @@ helpers do
   add_method_tracer :thread
   add_method_tracer :comment
   add_method_tracer :flag_as_abuse
-  add_method_tracer :unflag_as_abuse
+  add_method_tracer :un_flag_as_abuse
   add_method_tracer :author_contents_only
   add_method_tracer :handle_threads_query
 

models/comment_thread.rb

@@ -309,7 +309,9 @@ private
     subscriptions.delete_all
   end
 
+  class << self
     include ::NewRelic::Agent::MethodTracer
-  add_method_tracer :perform_search
+    add_method_tracer :perform_search, 'Custom/perform_search'
+  end
 
 end