Sensor inactive after clone via API

You don't need to wait a few minutes, a few seconds (5-10) should be sufficient for the port listener to come up.

I tried adding a sleep of 10s to my code after cloning the sensor but it did not resolve the issue - I still get Matching Sensors = 0 on that immediate push after creating the sensor.

I then increased the sleep time and eventually at 60s sleep after creating a sensor did I get successful data push. This does seem like an awfully long pause to put in my code!

Is there any way to trigger / force the port listener to come up?

If not, can you recommend and API method to poll the server to check the sensor listener is up? Ideally without pushing dummy data.

In case it's helpful, we are using version 16.2.23.3171

Is your sensor actually resumed? You can check the availability like this, in Powershell:
http://pastebin.com/raw/WwUhrGLP

If it works, the output will look something like this:

Name                           Value                                                                                                                                                           
----                           -----                                                                                                                                                           
ReponseCode                    OK                                                                                                                                                              
ResponseUri                    <your-url>:5050/A442C3E9-7C86-4F18-8CA4-A565AE4EB2C2                                                                                          
NewSensorID                    -1 

If anything goes wrong:

[23.08.2016 10:12:37]      error      URL could not be called. Error: System.Net.WebException
[23.08.2016 10:12:37]      notes      The connection with the remote host could not be established.

Hope that it's somewhat helpful :)

Yes - sensor is definitely resumed. I have implemented polling every 3 seconds and after about 45s the sensor becomes active and then my code successfully pushes the first data set. If there's any better way to do this I'd be grateful to hear from you. Thanks for your help to date.

You could try installing the latest version of PRTG, where it hopefully works faster :)

We now have the latest version installed but no change to our issue. After cloning and un-pause, the code attempts to send the first push repeatedly (every 6 seconds) until the response comes back with "Matching Sensors = 1". This consistently takes about 45s each time I run this test.

If I run your powershell script during the 45s I get a successful response so the sensor is alive. But it just isn't able to receive the first push until 45s later.

It appears that I can create a clone via the web UI and it is ready to accept data in less than 45s (maybe even immediately). So there must be a way to fix this.

We'll continue in the ticket and post the solution once we found one.

Turns out that after a bit of fiddling, an initial scan of the sensor via /api/scannow.htm?id={new-id} after the sensor being resumed solves the problem:

[22.09.2016 09:23:56]   information   Starting sensor creation for Testing (GUID: 2f4826a3-4cd5-40c5-97c2-f4ad13c8264a)
[22.09.2016 09:23:57]     success     Sensor created successfully. New sensor ID: 8205
[22.09.2016 09:23:57]     success     Sensor has been resumed.
[22.09.2016 09:23:58]     success     Sensor is now accepting data (0.57s)
[22.09.2016 09:23:58]   information   Starting sensor creation for Testing (GUID: 83b3a639-2a40-49e4-b5d7-be253055b6aa)
[22.09.2016 09:23:58]     success     Sensor created successfully. New sensor ID: 8206
[22.09.2016 09:23:58]     success     Sensor has been resumed.
[22.09.2016 09:24:00]     success     Sensor is now accepting data (0.731s)