Auto-merge for PR #715 via VersionBot

Add a backoff mechanism for state reporting errors.

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file
 automatically by Versionist. DO NOT EDIT THIS FILE MANUALLY!
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## v7.16.3 - 2018-08-01
+
+* Add a backoff mechanism for state reporting errors #715 [Pagan Gazzard]
+
 ## v7.16.2 - 2018-07-25
 
 * Fix: Fix scoping issue with variables in service-manager #711 [Cameron Diver]

package.json

@@ -1,7 +1,7 @@
 {
   "name": "resin-supervisor",
   "description": "This is resin.io's Supervisor, a program that runs on IoT devices and has the task of running user Apps (which are Docker containers), and updating them as Resin's API informs it to.",
-  "version": "7.16.2",
+  "version": "7.16.3",
   "license": "Apache-2.0",
   "repository": {
     "type": "git",

src/api-binder.coffee

@@ -16,7 +16,7 @@ DuplicateUuidError = (err) ->
 ExchangeKeyError = class ExchangeKeyError extends TypedError
 
 REPORT_SUCCESS_DELAY = 1000
-REPORT_RETRY_DELAY = 5000
+MAX_REPORT_RETRY_DELAY = 60000
 
 createAPIBinderRouter = (apiBinder) ->
 	router = express.Router()
@@ -439,7 +439,8 @@ module.exports = class APIBinder
 		.catch (err) =>
 			@stateReportErrors += 1
 			@eventTracker.track('Device state report failure', { error: err })
-			Promise.delay(REPORT_RETRY_DELAY)
+			delay = Math.min((2 ** @stateReportErrors) * 500, MAX_REPORT_RETRY_DELAY)
+			Promise.delay(delay)
 			.then =>
 				@_reportCurrentState()
 		return null