Azure IoT Edge
An Azure service that is used to deploy cloud workloads to run on internet of things (IoT) edge devices via standard containers.
426 questions
Why is it that IoT Edge devices cannot connect to the IOT HUB after a month with the connection string, but can connect again after updating the string
cooldesign01
0
Reputation points
IoT Edge devices cannot connect to the IOT HUB after one month of operation, but they can connect again after updating the string.The error is as follows.
2023-04-14 17:04:33.395 [azure-iot-sdk-ConnectionReconnectionTask:b3a6cdca-7daf-46c5-b307-8d1a5803edd5] ERROR [c.m.a.s.i.d.t.IotHubTransport]: Reconnection was abandoned due to encountering a non-retryable exception
com.microsoft.azure.sdk.iot.device.exceptions.ProtocolException: Unable to establish MQTT connection
at com.microsoft.azure.sdk.iot.device.transport.mqtt.exceptions.PahoExceptionTranslator.convertToMqttException(PahoExceptionTranslator.java:46)
at com.microsoft.azure.sdk.iot.device.transport.mqtt.Mqtt.connect(Mqtt.java:131)
at com.microsoft.azure.sdk.iot.device.transport.mqtt.MqttMessaging.start(MqttMessaging.java:61)
at com.microsoft.azure.sdk.iot.device.transport.mqtt.MqttIotHubConnection.open(MqttIotHubConnection.java:283)
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.openConnection(IotHubTransport.java:1114)
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.singleReconnectAttempt(IotHubTransport.java:1328)
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.reconnect(IotHubTransport.java:1254)
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.handleDisconnection(IotHubTransport.java:1150)
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.onConnectionLost(IotHubTransport.java:336)
at com.microsoft.azure.sdk.iot.device.transport.ReconnectionNotifier$1.run(ReconnectionNotifier.java:22)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.eclipse.paho.client.mqttv3.MqttException: MqttException
at org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:38)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:736)
... 1 common frames omitted
Caused by: javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:994)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1367)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1395)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1379)
at org.eclipse.paho.client.mqttv3.internal.SSLNetworkModule.start(SSLNetworkModule.java:149)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:722)
... 1 common frames omitted
Caused by: java.io.EOFException: SSL peer shut down incorrectly
at sun.security.ssl.InputRecord.read(InputRecord.java:505)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:975)
... 6 common frames omitted
java.lang.IllegalStateException: Cannot add a message when the transport is closed.
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.addMessage(IotHubTransport.java:518)
at com.microsoft.azure.sdk.iot.device.DeviceIO.sendEventAsync(DeviceIO.java:345)
at com.microsoft.azure.sdk.iot.device.InternalClient.sendEventAsync(InternalClient.java:216)
at com.microsoft.azure.sdk.iot.device.ModuleClient.sendEventAsync(ModuleClient.java:408)
at com.microsoft.azure.sdk.iot.device.ModuleClient.sendEventAsync(ModuleClient.java:398)
at jp.cooldesign.ems.biz.service.EdgeAzureService.sendMessageToHub(EdgeAzureService.java:152)
at jp.cooldesign.ems.biz.task.AzureSendTask.run(AzureSendTask.java:39)
{count} votes
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Dom 1,301 Reputation points Microsoft Employee
2023-05-23T05:46:14.5966667+00:00 Hi @cooldesign01 - can you clarify what you mean by "updating the string"? Are you regenerating the device keys and then updating the connection string on your device? Also, is this affecting just one device or all of your devices? Thanks!
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cooldesign01 0 Reputation points
2023-05-23T07:17:02.34+00:00 Hi @Dom Thank you for your reply!As you said,i regenerate the device keys and then updating the connection string on my device,then the device can connect to iot hub.This affects one device.This has happened twice. I hope you can help me solve this problem.Thanks!
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cooldesign01 0 Reputation points
2023-05-23T07:23:01.0433333+00:00 Hi @Dom Thank you for your reply. As you said,i regenerated the device keys and then updated the connection string on my device,and then the device could connect ro iot hub.This affects just one device.This has happened twice. I hope you can help me solve this problem.Thanks!
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Sander van de Velde 17,936 Reputation points MVP2023-05-23T08:45:46.48+00:00 Hello @cooldesign01 ,
is this code coming from an Edge module?
Or is this an application written using one of the Azure IoT Device SDKs (like Java)?
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cooldesign01 0 Reputation points
2023-05-23T09:05:57.61+00:00 Hi @Sander van de Velde ，
This code comes from an Edge custom module.
It is an application written using the Azure IoT device sdk and then deployed to IoT Edge devices.
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cooldesign01 0 Reputation points
2023-05-23T10:21:17.22+00:00 Device uses Moxs aig-300-series/aig-301-azu-lx
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Sander van de Velde 17,936 Reputation points MVP
2023-05-23T10:24:20.2633333+00:00 Hello @cooldesign01 ,
although it's not part of the default Azure IoT Edge template, testing for connection connect/disconnect is recommended.
The C# moduleClient throws events for this. Can you update your code to listen for disconnects and try to connect again?
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Dom 1,301 Reputation points Microsoft Employee
2023-05-23T13:02:05.3233333+00:00 Hi @cooldesign01 - there's also a Java sample that shows best practices for handling disconnects from device or module clients: https://github.com/Azure/azure-iot-sdk-java/tree/main/iothub/device/iot-device-samples/device-reconnection-sample
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