While trying to create an SNS subscription, after choosing a topic, all protocols except SQS disappear

Question

I am attempting to create an SNS subscription to a topic I have just created. In the dropdown next to protocols, I see all of them before choosing a topic. But after I choose the topic, all protocols except SNS disappear from the dropdown. I tried deleting the topic and creating a new one but the same issue persists.

Answer

As per your description, this disappearance of protocols can take place only if the topic selected is a Fifo topic [1]. Standard topics are designed to support all the below mentioned protocols while Fifo topic only allows SQS Fifo queues as subscription.

* *    http – delivery of JSON-encoded message via HTTP POST
* *     https – delivery of JSON-encoded message via HTTPS POST
* *     email – delivery of message via SMTP
* *     email-json – delivery of JSON-encoded message via SMTP
* *     sms – delivery of message via SMS
* *     sqs – delivery of JSON-encoded message to an Amazon SQS queue
* *     application – delivery of JSON-encoded message to an EndpointArn for a mobile app and device
* *     lambda – delivery of JSON-encoded message to an AWS Lambda function
* *     firehose – delivery of JSON-encoded message to an Amazon Kinesis Data Firehose delivery stream.

In order to troubleshoot this, please select standard topic on the top while creating a topic from SNS console [2].

References:
1] https://docs.aws.amazon.com/sns/latest/dg/fifo-message-delivery.html
2] https://docs.aws.amazon.com/sns/latest/api/API_Subscribe.html
3] https://docs.aws.amazon.com/sns/latest/dg/sns-create-topic.html

While trying to create an SNS subscription, after choosing a topic, all protocols except SQS disappear

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