New default websocket reconnect backoff pattern (#478)

new default backoff pattern for reconnect

docs/settingup.md

@@ -2533,7 +2533,7 @@ Settings specific to the `simple` scheduler.
 * `instance`: Instance number for this instance. Use different instance numbers when running the same script in multiple instances to make sure the randomization is different in each instance. Defaults to 1.
 * `reconnectsettings`: Settings for enabling re-connection attempts in case of unexpected disconnects.
   * `reconnect`: Enable re-connection attempts if the WebSocket is disconnected. Defaults to `false`.
-  * `backoff`: Re-connection backoff scheme. Defaults to `[0.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0]`, if left empty. An example backoff scheme could be `[0.0, 1.0, 10.0, 20.0]`:
+  * `backoff`: Re-connection backoff scheme. Defaults to `[0.0, 2.0, 2.0, 2.0, 2.0, 2.0, 4.0, 4.0, 8.0, 12.0, 16.0]`, if left empty. An example backoff scheme could be `[0.0, 1.0, 10.0, 20.0]`:
       * `0.0`: If the WebSocket is disconnected, wait 0.0s before attempting to re-connect
       * `1.0`: If the previous attempt to re-connect failed, wait 1.0s before attempting again
       * `10.0`: If the previous attempt to re-connect failed, wait 10.0s before attempting again

generatedocs/data/params.json

@@ -490,7 +490,7 @@
         "Enable re-connection attempts if the WebSocket is disconnected. Defaults to `false`."
     ],
     "reconnectsettings.backoff" : [
-        "Re-connection backoff scheme. Defaults to `[0.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0]`, if left empty. An example backoff scheme could be `[0.0, 1.0, 10.0, 20.0]`:",
+        "Re-connection backoff scheme. Defaults to `[0.0, 2.0, 2.0, 2.0, 2.0, 2.0, 4.0, 4.0, 8.0, 12.0, 16.0]`, if left empty. An example backoff scheme could be `[0.0, 1.0, 10.0, 20.0]`:",
         "`0.0`: If the WebSocket is disconnected, wait 0.0s before attempting to re-connect",
         "`1.0`: If the previous attempt to re-connect failed, wait 1.0s before attempting again",
         "`10.0`: If the previous attempt to re-connect failed, wait 10.0s before attempting again",

generatedocs/generated/documentation.go

@@ -326,7 +326,7 @@ var (
 		"randomaction.actions.weight":                     {"The probabilistic weight of the action, specified as an integer. This number is proportional to the likelihood of the specified action, and is used as a weight in a uniform random selection."},
 		"randomaction.iterations":                         {"Number of random actions to perform."},
 		"randomaction.thinktimesettings":                  {"Settings for the `thinktime` action, which is automatically inserted after every randomized action."},
-		"reconnectsettings.backoff":                       {"Re-connection backoff scheme. Defaults to `[0.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0]`, if left empty. An example backoff scheme could be `[0.0, 1.0, 10.0, 20.0]`:", "`0.0`: If the WebSocket is disconnected, wait 0.0s before attempting to re-connect", "`1.0`: If the previous attempt to re-connect failed, wait 1.0s before attempting again", "`10.0`: If the previous attempt to re-connect failed, wait 10.0s before attempting again", "`20.0`: If the previous attempt to re-connect failed, wait 20.0s before attempting again"},
+		"reconnectsettings.backoff":                       {"Re-connection backoff scheme. Defaults to `[0.0, 2.0, 2.0, 2.0, 2.0, 2.0, 4.0, 4.0, 8.0, 12.0, 16.0]`, if left empty. An example backoff scheme could be `[0.0, 1.0, 10.0, 20.0]`:", "`0.0`: If the WebSocket is disconnected, wait 0.0s before attempting to re-connect", "`1.0`: If the previous attempt to re-connect failed, wait 1.0s before attempting again", "`10.0`: If the previous attempt to re-connect failed, wait 10.0s before attempting again", "`20.0`: If the previous attempt to re-connect failed, wait 20.0s before attempting again"},
 		"reconnectsettings.reconnect":                     {"Enable re-connection attempts if the WebSocket is disconnected. Defaults to `false`."},
 		"reload.log":                                      {"Save the reload log as a field in the output (`true` / `false`). Defaults to `false`, if omitted. **Note:** This should only be used when needed as the reload log can become very large."},
 		"reload.mode":                                     {"Error handling during the reload operation", "`default`: Use the default error handling.", "`abend`: Stop reloading the script, if an error occurs.", "`ignore`: Continue reloading the script even if an error is detected in the script."},

wsdialer/wsdialer.go

@@ -75,7 +75,7 @@ const (
 
 var (
 	// DefaultBackoff of reconnection
-	DefaultBackoff = []float64{0.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0}
+	DefaultBackoff = []float64{0.0, 2.0, 2.0, 2.0, 2.0, 2.0, 4.0, 4.0, 8.0, 12.0, 16.0}
 
 	closedChan = make(chan struct{}) // reusable closed channel
 )