2 files changed, 8 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
index 9f5efda97c..3683522a0c 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
@@ -629,6 +629,7 @@ module ActiveRecord
         ER_LOCK_DEADLOCK        = 1213
         ER_CANNOT_ADD_FOREIGN   = 1215
         ER_CANNOT_CREATE_TABLE  = 1005
+        ER_LOCK_WAIT_TIMEOUT    = 1205
 
         def translate_exception(exception, message)
           case error_number(exception)
@@ -652,6 +653,8 @@ module ActiveRecord
             NotNullViolation.new(message)
           when ER_LOCK_DEADLOCK
             Deadlocked.new(message)
+          when ER_LOCK_WAIT_TIMEOUT
+            TransactionTimeout.new(message)
           else
             super
           end
diff --git a/activerecord/lib/active_record/errors.rb b/activerecord/lib/active_record/errors.rb
index e790760292..9ef3316393 100644
--- a/activerecord/lib/active_record/errors.rb
+++ b/activerecord/lib/active_record/errors.rb
@@ -334,4 +334,9 @@ module ActiveRecord
   # +reverse_order+ to automatically reverse.
   class IrreversibleOrderError < ActiveRecordError
   end
+
+  # TransactionTimeout will be raised when lock wait timeout expires.
+  # Wait time value is set by innodb_lock_wait_timeout.
+  class TransactionTimeout < StatementInvalid
+  end
 end