li1234yun opened a new issue #13531:
URL: https://github.com/apache/airflow/issues/13531
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**Apache Airflow version**:
2.0
**Environment**:
- **OS** ubuntu 18.04
- **Kernel** 5.4.0-47-generic
**What happened**:
When I use list task instances REST api, I can not get the instances that
status is `no_status`.
```
### Get Task Instances
POST {{baseUrl}}/dags/~/dagRuns/~/taskInstances/list
Authorization: Basic admin:xxx
Content-Type: application/json
{
"dag_ids": ["stop_dags"]
}
or
{
"dag_ids": ["stop_dags"],
"state": ["null"]
}
```
**What you expected to happen**:
include all state task instances when I don't have specific states.
<!-- What do you think went wrong? -->
**How to reproduce it**:
use REST test tools like postman to visit the api.
**Anything else we need to know**:
I can not find the REST api that I get all the dag runs instances with
specific state, maybe should extend the REST api.
Thanks!
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