BUGFIX: don't leak out a transaction if fails

app/jobs/regular/importer.rb

@@ -188,7 +188,10 @@ module Jobs
         parameter_markers = fields.map {|x| "?"}.join(',')
         sql_stmt = "INSERT INTO #{table_name} (#{fields.join(',')}) VALUES (#{parameter_markers})"
 
+        in_tran = false
+        begin
           User.exec_sql("BEGIN TRANSACTION") unless Rails.env.test?
+          in_tran = true
           i = 0
           rows.each do |row|
             if i % batch_size == 0 && i > 0
@@ -198,6 +201,9 @@ module Jobs
             i += 1
           end
           User.exec_sql("COMMIT") unless Rails.env.test?
+        rescue
+          User.exec_sql("ROLLBACK") if in_tran
+        end
 
         true
       else