MSK Serverless Bootstrap Server Endpoint does not resolve

Question

I followed [this](https://docs.aws.amazon.com/msk/latest/developerguide/serverless-getting-started.html) tutorial to provision a serverless MSK cluster.
I am not able to connect to the cluster.

[This](https://docs.aws.amazon.com/msk/latest/developerguide/troubleshooting.html) troubleshooting guide recommends testing the connection via telnet:
`telnet bootstrap-broker port-number`

I receive this response:
`telnet: could not resolve abc.c2.kafka-serverless.us-west-2.amazonaws.com/9098: Name or service not known`

Does anyone know how I can connect a client to serverless MSK?

Note:
I've followed the same steps with a provisioned cluster. These steps seem to work with a provisioned cluster. Perhaps the docs are just wrong.

Answer

Hello,

I understand that you are experiencing following error when running telnet command to troubleshoot your MSK serverless endpoint:

```
telnet: could not resolve abc.c2.kafka-serverless.us-west-2.amazonaws.com/9098: Name or service not known
```

I would request you to please check your telnet command and run the command again to confirm your network connectivity.

Telnet command syntax:
```
telnet  
```
From the error message, I can see you are passing port number along with your endpoint (abc.c2.kafka-serverless.us-west-2.amazonaws.com/9098) due to which you are receiving above error. Correct telnet command syntax is shared below:

```
telnet abc.c2.kafka-serverless.us-west-2.amazonaws.com 9098
```

[+] Troubleshooting your Amazon MSK cluster - Unable to access cluster from within AWS: Networking issues - https://docs.aws.amazon.com/msk/latest/developerguide/troubleshooting.html#networking-trouble

MSK Serverless Bootstrap Server Endpoint does not resolve

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