Try to test settings added in the service.

app/controllers/projects/services_controller.rb

@@ -29,7 +29,7 @@ class Projects::ServicesController < Projects::ApplicationController
     if @service.execute(data)
       message = { notice: 'We sent a request to the provided URL' }
     else
-      message = { alert: 'We tried to send a request to the provided URL but error occured' }
+      message = { alert: 'We tried to send a request to the provided URL but an error occured' }
     end
 
     redirect_to :back, message

app/models/project_services/issue_tracker_service.rb

@@ -65,6 +65,29 @@ class IssueTrackerService < Service
     end
   end
 
+  def execute(data)
+    message = "#{self.type} was unable to reach #{self.project_url}. Check the url and try again."
+    result = false
+
+    begin
+      url = URI.parse(self.project_url)
+
+      if url.host && url.port
+        http = Net::HTTP.start(url.host, url.port, {open_timeout: 5, read_timeout: 5})
+        response = http.head("/")
+
+        if response
+          message = "#{self.type} received response #{response.code} when attempting to connect to #{self.project_url}"
+          result = true
+        end
+      end
+    rescue Timeout::Error, SocketError, Errno::ECONNRESET, Errno::ECONNREFUSED => error
+      message = "#{self.type} had an error when trying to connect to #{self.project_url}: #{error.message}"
+    end
+    Rails.logger.info(message)
+    result
+  end
+
   private
 
   def enabled_in_gitlab_config