If not, switch to the VPC management console and set the security group rule of the cluster to allow port 9200 in both the outbound and inbound directions.
Check whether the ECS instance is added to a security group.
If added to a security group, check whether the security group configuration rules meet the requirements. For details, see the description of Security Group in the cluster information table in Cluster Management. Then go to 4.
Figure 1 Viewing security group information
If not, go to the VPC page from the ECS instance details page, select a security group, and add the security group.
Check whether the ECS instance can connect to the cluster.
ssh<Private network address and port number of a node>
If the cluster contains multiple nodes, check whether the ECS can be connected to each node in the cluster.
If the connection is normal, the network is running properly.
If the port is unreachable, contact customer service.