pkuwm opened a new issue #1232:
URL: https://github.com/apache/helix/issues/1232
**Describe the bug**
Health check stoppable responds with empty hostname
**To Reproduce**
Turn off the cluster config: "PERSIST_INTERMEDIATE_ASSIGNMENT": "false"
Issue REST request:
`/namespaces/<namespace>/clusters/<cluster>/instances?command=stoppable -d '
{"instances": ["instance"], "selection_base": "zone_based", "max_instance":
"2", "customized_values": "{}"}' -H "Content-Type: application/json"`
Response has empty contents:
```
{
"instance_stoppable_parallel" : [ ],
"instance_not_stoppable_with_reasons" : { }
}
```
**Expected behavior**
```
{
"instance_stoppable_parallel" : [ "instance" ],
"instance_not_stoppable_with_reasons" : { }
}
```
**Additional context**
"PERSIST_INTERMEDIATE_ASSIGNMENT" needs to be turned on so REST API could
check the instance is already in stable state: IS matches EV, as a condition of
an instance stoppable.
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