dosubot[bot] commented on issue #2667:
URL:
https://github.com/apache/incubator-hugegraph/issues/2667#issuecomment-2380591926
<!-- Answer -->
To simulate the situation where restarting a HugeGraph container results in
the error "The server with name 'server-1' already in cluster", you can follow
these steps:
1. **Initial Setup**: Start a HugeGraph container with the default
configuration where `server.id` is set to `server-1`.
2. **Restart the Container**: Restart the HugeGraph container without
changing the `server.id`.
Here is an example using Docker to simulate this:
```bash
# Step 1: Start the HugeGraph container
docker run -d --name hugegraph -p 8080:8080 -p 8182:8182 hugegraph/hugegraph
# Step 2: Restart the HugeGraph container
docker restart hugegraph
```
The configuration file `rest-server.properties` contains the following line
which sets the server ID:
```properties
server.id=server-1
```
When the container restarts, it will attempt to rejoin the cluster with the
same `server.id`, leading to the error "The server with name 'server-1' already
in cluster".
According to the HugeGraph documentation, the `server.id` is used for
license verification and must be unique within the cluster. This is why
restarting the container with the same `server.id` causes the conflict.
Additionally, you can use `docker-compose` to manage HugeGraph and related
instances. Here is an example `docker-compose.yml`:
```yaml
version: '3'
services:
server:
image: hugegraph/hugegraph
container_name: server
ports:
- 8080:8080
```
To start the services, use:
```bash
docker-compose up -d
```
This setup ensures that the server configuration is managed consistently,
and any restart will follow the same configuration, potentially leading to the
same error if `server.id` is not unique
<sup>[[1]](https://github.com/apache/incubator-hugegraph-doc/blob/master/content/en/docs/config/config-option.md)</sup><sup>[[2]](https://github.com/apache/incubator-hugegraph-doc/blob/master/content/cn/docs/config/config-option.md)</sup><sup>[[3]](https://github.com/apache/incubator-hugegraph-doc/blob/master/content/en/docs/quickstart/hugegraph-server.md)</sup>.
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