ecs-session list fails if one ECS cluster has no tasks

[giom-l]

I encountered some problems to use ecs-session in one of my account.
After adding --debug arg, it appeared that one of my ECS cluster has no tasks (seems not so useful, but why not).

After digging a little in the code, the issue happens here :
It fails when using the paginator list_tasks that returns an empty list of tasks.

Error thrown is

[ssm-tools.ecs-session] ERROR: An error occurred (InvalidParameterException) when calling the DescribeTasks operation: Tasks cannot be empty.

It would be better to first check if the paginator is empty or not, before going further.
However, I'm not sure what is the best way to check :

• use boto3 can_paginate
• or via KeyCount key on the first page (as mentionned here

[mludvig]

Thanks for the report, fixed in 2682545 and released in aws-ssm-tools 1.5.1