Sockets hanging in 3.929.0 on iot data plane client #7510
Description
Checkboxes for prior research
- I've gone through Developer Guide and API reference
- I've checked AWS Forums and StackOverflow.
- I've searched for previous similar issues and didn't find any solution.
Describe the bug
When publishing to an mqtt topic via the iot data plane client in a batch it used to handle smaller maxSockets than the batch size absolutely fine. However since upgrading to 3.929.0 it hangs after using up the sockets for maxSockets and then doesn't release those sockets for the requests that are queued.
It works fine in 3.928.0.
Is this something to do with the big underlying refactor to use schema serde (PR, release notes)?
Regression Issue
- Select this option if this issue appears to be a regression.
SDK version number
@aws-sdk/iot-data-plane-client@3.929.0
Which JavaScript Runtime is this issue in?
Node.js
Details of the browser/Node.js/ReactNative version
22.18.0
Reproduction Steps
const iotClient = new IoTClient(commonAwsConfig);
const describeEndpointCommand = new DescribeEndpointCommand({ endpointType: 'iot:Data-ATS' });
const iotEndpointResponse = await iotClient.send(describeEndpointCommand);
const iotDataPlaneClient = new IoTDataPlaneClient({
endpoint: `https://${iotEndpointResponse.endpointAddress}`,
});
// Number in array more than maxSockets (defaults to 50)
const ids = new Array(100).fill(0).map((_, index) => String(index));
await Promise.all(ids.map(async (id) => {
const publishCommand = new PublishCommand({
topic: `a-test-topic/${id}`,
qos: 1,
payload: JSON.stringify({
'hello': 'world',
}),
});
console.debug(`Publishing ${id}`);
await iotDataPlaneClient.send(publishCommand);
console.debug(`Published ${id}`);
}));
Observed Behavior
It just hangs and doesn't finishing publishing anything beyond what the default socket number is
Expected Behavior
To reuse the sockets and publish all successfully
Possible Solution
No response
Additional Information/Context
No response