MQTT publishing hangs after a while about leaf-python-mqtt HOT 8 OPEN

Ran this with a subscribe in the background, ended up stopped after 20 hours:

Jul 17 14:16:15 leaf/status Connecting to MQTT host emonpi
Jul 17 14:16:15 leaf/status MQTT connected
Jul 17 14:16:31 leaf/status/last_updated 2018/07/17 13:58
Jul 17 14:16:32 leaf/status/battery_percent 96.25
Jul 17 14:16:33 leaf/status/charging_status NOT_CHARGING
...
Jul 18 10:51:24 leaf/status/last_updated 2018/07/18 09:58
Jul 18 10:51:25 leaf/status/battery_percent 92.0833333333
Jul 18 10:51:26 leaf/status/charging_status NOT_CHARGING
Jul 18 10:51:27 leaf/status/raw { _[removed for brevity]_ }
Jul 18 10:51:28 leaf/status/connected Yes

The socket is then dead:

pi@pizero:~ $ sudo netstat -anp |grep 1883
tcp        0      0 192.168.234.41:33926    192.168.234.18:1883     ESTABLISHED 435/node-red
tcp        1      0 192.168.234.41:57881    192.168.234.18:1883     CLOSE_WAIT  12447/python
tcp        0      0 192.168.234.41:37194    192.168.234.18:1883     ESTABLISHED 12438/mosquitto_sub

I need to go learn how to turn on debug logging now.

Edit: I have speculatively added an on_disconnect callback handler to see if is catches it (and it calls client.reconnect() )

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More data: Installing on an i7 based ubuntu server (my media server, at home) and all is well once I changed the BASE_URL in the pywings code. No hangs. Something on the RPi/Debian side I guess.

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MM interesting. I also ran this on a RasPi, seemed to work ok but the nissan API was very unreliable. Is there any difference in python version between RasPi and ubuntu?

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I changed the BASE_URL in the pywings code

What did you change it to?

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The BASE_URL in pycarwings.py from:

BASE_URL = "https://gdcportalgw.its-mo.com/gworchest_160803A/gdc/"

to

BASE_URL = "https://gdcportalgw.its-mo.com/api_v180117_NE/gdc/"

But I suspect it's regional...

Getting you version numbers but the RPi is actually down at the moment. Which is odd.

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Ah yes, it looks like since May 18 we have a new API for the UK jdhorne/pycarwings2#35

Best use this version of pycarwings it has the new BASE_URL merged https://github.com/gym22/pycarwings2

This fixed it for me:

pip uninstall pycarwings2
pip install git+https://github.com/gym22/pycarwings2.git

I'll add a note to the readme for for the UK users to use this version.

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FWIW The version running on the ubuntu server also hung (but still logging) it just took longer. Feels like a resource leak and there is more of whatever on the bigger server. It's not memory.

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One more guess here; It seems to hang every time I try to publish into it, namely to request an "update". It sees it, reacts and publishes the request to Nissan and the response to the broker (which I see on another host) but then the TCP socket to the broker goes CLOSE_WAIT. I wonder if this is what happens on the RPi too, as I think I have a timed injection in Node-Red to query the car... More debug this weekend maybe. Paho MQTT seems fragile is used uncarefully.

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