# Cumulocity IoT Edge, inbound message logging?

**URL:** <https://community.cumulocity.com/t/cumulocity-iot-edge-inbound-message-logging/7331>\
**Category:** Forum\
**Tags:** cumulocity-edge, cumulocity\
**Created:** [October 31, 2023, 2:23pm UTC](https://community.cumulocity.com/t/cumulocity-iot-edge-inbound-message-logging/7331 "2023-10-31T14:23:34Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![simeon.mendgen](https://avatars.discourse-cdn.com/v4/letter/s/eb9ed0/32.png) [@simeon.mendgen](https://community.cumulocity.com/u/simeon.mendgen)\
**Post date:** [October 31, 2023, 2:23pm UTC](https://community.cumulocity.com/t/cumulocity-iot-edge-inbound-message-logging/7331/1 "2023-10-31T14:23:35Z")

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#### _ **Product/components** used and **version/fix** level:_

Cumulocity Edge 10.15

#### _Detailed explanation of the problem:_

When sending Json via MQTT Messages with a python paho client to the Cumulocity IoT Edge,  
the paho **client\_c8y.\_out\_messages** queue gets not emptied fast enougth what produces an error.

This is the sending command:  
`client_c8y.publish("measurement/measurements/createBulk", json.dumps(payload), qos=1)`

To debug this issue, i need to see a log of the cumulocity side MQTT broker or inbound messages. Is this possible?  
I cannot find this log in the “diagnostic file” which can be downloaded from the management tenant administration.

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**Author:** ![Murat\_Bayram](https://dub1.discourse-cdn.com/flex005/user_avatar/community.cumulocity.com/murat_bayram/32/3670_2.png) [@Murat\_Bayram](https://community.cumulocity.com/u/Murat_Bayram)\
**Post date:** [November 2, 2023, 8:00am UTC](https://community.cumulocity.com/t/cumulocity-iot-edge-inbound-message-logging/7331/2 "2023-11-02T08:00:53Z")

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Hi Simeon,

you can subscribe to the topic: “s/e” to get error messages.  
If you use Json via MQTT see also the “error” topic here:  
[https://cumulocity.com/guides/reference/smartrest-two/#error-handling](https://cumulocity.com/guides/reference/smartrest-two/#error-handling) (Thanks @Korbinian_Butz )

Best,

Murat

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**Author:** ![system](https://dub1.discourse-cdn.com/flex005/user_avatar/community.cumulocity.com/system/32/31990_2.png) [@system](https://community.cumulocity.com/u/system)\
**Post date:** [April 30, 2024, 8:01am UTC](https://community.cumulocity.com/t/cumulocity-iot-edge-inbound-message-logging/7331/3 "2024-04-30T08:01:23Z")

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