- [x] I have searched the [issues](https://github.com/apache/incubator-dubbo/issues) of this repository and believe that this is not a duplicate.
- [x] I have checked the [FAQ](https://github.com/apache/incubator-dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: xxx
* Operating System version: xxx
* Java version: xxx

### Steps to reproduce this issue

`org.apache.dubbo.remoting.etcd.jetcd.JEtcdClientWrapper#doClose`:

```
if (globalLeaseId > 0) {
        revokeLease(this.globalLeaseId);
}
```

should be change to :

```
if (globalLeaseId != 0) {
        revokeLease(this.globalLeaseId);
}
```


Pls. provide [GitHub address] to reproduce this issue.

### Expected Result

What do you expected from the above steps？

### Actual Result

What actually happens?

If there is an exception, please attach the exception trace:

```
Just put your stack trace here!
```

import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.remoting.etcd.RetryPolicy;
import org.apache.dubbo.remoting.etcd.StateListener;
import org.apache.dubbo.remoting.etcd.option.Constants;
import io.etcd.jetcd.ByteSequence;
import io.etcd.jetcd.Client;
import io.etcd.jetcd.ClientBuilder;
import io.etcd.jetcd.CloseableClient;
import io.etcd.jetcd.KeyValue;
import io.etcd.jetcd.Observers;
import io.etcd.jetcd.common.exception.ErrorCode;
import io.etcd.jetcd.common.exception.EtcdException;
import io.etcd.jetcd.kv.GetResponse;
import io.etcd.jetcd.lease.LeaseKeepAliveResponse;
import io.etcd.jetcd.options.GetOption;
import io.etcd.jetcd.options.PutOption;
import io.grpc.ConnectivityState;
import io.grpc.ManagedChannel;
import io.grpc.Status;
import io.grpc.stub.StreamObserver;
import io.grpc.util.RoundRobinLoadBalancerFactory;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Callable;