HSR Indexserver replication status shown unknow. XSA is installed on this cluster.

Hana system replication is showing indexserver's Replicaiton mode and Replication status as unknown.

there is not indexserver log in the trace files.

below is the output.

| Database | Host | Port | Service Name | Volume ID | Site ID | Site Name | Secondary | Secondary | Secondary | Secondary | Secondary | Replication | Replication | Replication |
| | | | | | | | Host | Port | Site ID | Site Name | Active Status | Mode | Status | Status Details |
| -------- | ----------- | ----- | ------------ | --------- | ------- | --------- | ----------- | --------- | --------- | --------- | ------------- | ----------- | ----------- | -------------- |
| SYSTEMDB | sdba2 | 30001 | nameserver | 1 | 1 | NODEA | sdbb2 | 30001 | 2 | NODEB | YES | SYNC | ACTIVE | |
| HHA | sdba2 | 30007 | xsengine | 2 | 1 | NODEA | sdbb2 | 30007 | 2 | NODEB | YES | SYNC | ACTIVE | |
| HHA | sdba2 | 30003 | indexserver | 3 | 1 | NODEA | sdbb2 | 30003 | 2 | NODEB | YES | UNKNOWN | UNKNOWN | |

status system replication site "2": UNKNOWN
overall system replication status: UNKNOWN

Local System Replication State
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

mode: PRIMARY
site id: 1
site name: NODEA



can someone help to fix this issue ?

Thanks in Advance