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Published 20 hours ago • verified publisher icon Azure

IOT Azure SDK NO_CONNECTION_ERROR - DPS

Open akramIOT opened this issue 1 year ago • 2 comments

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INSTRUCTIONS

Please follow the instructions and template below to save us time requesting additional information from you.

  1. Search existing issues to avoid creating duplicates.

o EI Software is sending the data to MSFT Azure IOT Hub. As per agreement from our end customer to debug /analyze this software issue I have shared this subscription ID with you. Cisco IOT/We own this entire solution as a whole for the customer for any software engineering caveats. What is MSFT’s Azure process to handle such engineering + Support engagements on the Azure IOT -C SDK issues (Server side) ?

https://developer.cisco.com/codeexchange/github/repo/akramIOT/Cisco_Edge_Intelligence/ - PFI the implementation architecture from Cisco EI Software to MSFT Azure IOT Hub for your reference

  1. If possible test using the latest release to make sure your issues has not already been fixed: https://github.com/Azure/azure-iot-sdk-c/releases/latest A: Yes

  2. Do not share information from your Azure subscription here (connection strings, service names (IoT Hub name, Device Provisioning Service scope ID), etc...). If you need to share any of this information, you can create a ticket and get assistance from the Microsoft Support.

How to Submit an Azure Support Ticket: https://docs.microsoft.com/azure/azure-supportability/how-to-create-azure-support-request A: Done,

Support request ID 2208310010002839

  1. Include enough information for us to address the bug:

    • A detailed description.
    • A Minimal Complete Reproducible Example (https://stackoverflow.com/help/mcve). This is code we can cut and paste into a readily available sample and run, or a link to a project you've written that we can compile to reproduce the bug.
    • Console logs. If you are unsure how to enable logging, refer to this document: https://github.com/Azure/azure-iot-sdk-c/blob/main/doc/Iothub_sdk_options.md A: Kindly refer this link for architecture
      [https://developer.cisco.com/codeexchange/github/repo/akramIOT/Cisco_Edge_Intelligence/]

  2. Delete these instructions before submitting the bug.

Below is a hypothetical bug report. We recommend you use it as a template and replace the information below each header with your own.

------------------------------- delete above ------------------------------- I am using Azure IOT Hub for ingesting the data and we are using the Azure C SDK (client) running on Cisco’s IOT gateways (hardware platforms).

Use this below link for reference https://developer.cisco.com/codeexchange/github/repo/akramIOT/Cisco_Edge_Intelligence/#edit

https://github.com/Azure/azure-iot-sdk-c/releases/tag/LTS_07_2022_Ref01 - This SDK is being used.

  1. We ran a monitoring script which does trace route and netstat on azure endpoint every 1s Azure sdk disconnects frequently and the connection is not stable where you can see most of the time in SYNC_SENT state

    1. Enabled Azure SDK debug logs which also indicates frequent DISCONNECT. When it reconnects, burst of messages are sent which in-turn causes more instability

time::Wed Aug 17 07:30:42 UTC 2022 nslookup_op: Server: 10.8.73.17 Address: 10.8.73.17:53

Non-authoritative answer:
DevIOTHub01.azure-devices.net    canonical name = ihsu-westeurope-6.westeurope.cloudapp.azure.com
Name:    ihsu-westeurope-6.westeurope.cloudapp.azure.com
Address: 40.113.176.174

Non-authoritative answer:
DevIOTHub01.azure-devices.net    canonical name = ihsu-westeurope-6.westeurope.cloudapp.azure.com
 azure_ip: 40.113.176.174netstat: showing only processes with your user ID

 netstat op: 
 tcp        0      0 127.0.0.1:56166         127.0.0.1:8484          ESTABLISHED 29393/dslink-cpp-az
tcp        0      1 10.8.73.18:37580        40.113.176.174:8883     SYN_SENT    29393/dslink-cpp-az

-> 07:29:55 PUBLISH | IS_DUP: false | RETAIN: 0 | QOS: DELIVER_AT_LEAST_ONCE | TOPIC_NAME: devices/P36Q_PLC02/messages/events/%24.ct=application%2Fjson&%24.ce=utf-8 | PACKET_ID: 138 | PAYLOAD_LEN: 578 -> 07:29:56 PUBLISH | IS_DUP: false | RETAIN: 0 | QOS: DELIVER_AT_LEAST_ONCE | TOPIC_NAME: devices/P36Q_PLC02/messages/events/%24.ct=application%2Fjson&%24.ce=utf-8 | PACKET_ID: 78 | PAYLOAD_LEN: 590 -> 07:29:56 PUBLISH | IS_DUP: false | RETAIN: 0 | QOS: DELIVER_AT_LEAST_ONCE | TOPIC_NAME: devices/P36Q_PLC02/messages/events/%24.ct=application%2Fjson&%24.ce=utf-8 | PACKET_ID: 139 | PAYLOAD_LEN: 636 -> 07:29:57 PUBLISH | IS_DUP: false | RETAIN: 0 | QOS: DELIVER_AT_LEAST_ONCE | TOPIC_NAME: devices/P36Q_PLC02/messages/events/%24.ct=application%2Fjson&%24.ce=utf-8 | PACKET_ID: 79 | PAYLOAD_LEN: 373 -> 07:29:57 PUBLISH | IS_DUP: false | RETAIN: 0 | QOS: DELIVER_AT_LEAST_ONCE | TOPIC_NAME: devices/P36Q_PLC02/messages/events/%24.ct=application%2Fjson&%24.ce=utf-8 | PACKET_ID: 140 | PAYLOAD_LEN: 554 -> 07:29:58 DISCONNECT [2022-08-17 07:29:58.526645] WARNING SDK(1021): Error/time-out on IoTHub client confirmation - Dropping message. Delivery failed due to time-out.

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akramIOT avatar Sep 14 '22 23:09 akramIOT

@akramIOT this is not a service support form and we don't have the tools to assist you on resolving your stated issue. Please continue to work with your Support Engineer on the Support Request ((2208310010002839) that you created above. Thanks

ericwolz avatar Sep 15 '22 01:09 ericwolz

@akramIOT this is not a service support form and we don't have the tools to assist you on resolving your stated issue. Please continue to work with your Support Engineer on the Support Request ((2208310010002839) that you created above. Thanks

ok

akramIOT avatar Sep 15 '22 01:09 akramIOT