AWS JAVA IoT client reconnects every 10 minutes

Question

I use IoT SDK in JAVA. When my application starts, it connects to IoT core of AWS:

iotClient = new AWSIotMqttClient(. . .);            
iotClient.connect();

But after application starting I see in my log a very strange behavior and it happens every 10 minutes:

[pool-8-thread-1] com.amazonaws.services.iot.client.core.AwsIotConnection.onConnectionSuccess Connection successfully established
[pool-8-thread-1] com.amazonaws.services.iot.client.core.AbstractAwsIotClient.onConnectionSuccess Client connection active: <client ID>
[pool-8-thread-1] com.amazonaws.services.iot.client.core.AwsIotConnection.onConnectionFailure Connection temporarily lost
[pool-8-thread-1] com.amazonaws.services.iot.client.core.AbstractAwsIotClient.onConnectionFailure Client connection lost: <client ID>
[pool-8-thread-1] com.amazonaws.services.iot.client.core.AwsIotConnection$1.run Connection is being retried
[pool-8-thread-1] com.amazonaws.services.iot.client.core.AwsIotConnection.onConnectionSuccess Connection successfully established
[pool-8-thread-1] com.amazonaws.services.iot.client.core.AbstractAwsIotClient.onConnectionSuccess Client connection active: <client ID>

How can I disable reconnection every 10 minutes? I use IoT Rules on CONNECTED/DISCONNECTED topic, so reconnection every 10 minutes fires this rule every 10 minutes...

Every 10mins sounds like it may be something at the network level clearing out long term connections. Look at the network your system is running on. — hardillb, Nov 24 '20 at 10:30
Can you provide more details? What exactly do I need to check? Thanks — Rougher, Nov 24 '20 at 10:35
You need to talk to your network administrator to see if the router/firewall has rules about dropping connections that have no traffic after a certain time limit. — hardillb, Nov 24 '20 at 10:38
That may be where the code it running, but that will not how your site/location is connected to the actual internet — hardillb, Nov 24 '20 at 10:43

score 1 · Answer 1 · answered Dec 02 '20 at 08:04

Had the same issue, only on my EKS Kubernetes Cluster, but not on my local dev computer. I found out that the Default keepalive interval of the java lib is 600000ms or 10 minutes. This is not what some documentation declared.

The NAT used on my cluster has a fix Idle Timeout of 350 seconds. So the connection would drop.

I changed it to a lower value (like 30000ms).

iotClient.setKeepAliveInterval(30000);

For now this seems to work.

score 0 · Answer 2 · answered Nov 26 '20 at 07:41

0

I don't know why, but it is my solution:

iotClient = new AWSIotMqttClient(. . .);    
        
iotClient.setKeepAliveInterval(0);

iotClient.connect();

answered Nov 26 '20 at 07:41

Rougher

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AWS JAVA IoT client reconnects every 10 minutes

2 Answers2