gunli opened a new issue, #11709:
URL: https://github.com/apache/inlong/issues/11709
### Description
```go
func (d *dataProxyDiscoverer) update() {
wg := sync.WaitGroup{}
ticker := time.NewTicker(d.lookupInterval)
stopCh := make(chan struct{})
wg.Add(1)
go func() {
defer wg.Done()
for {
select {
case <-ticker.C:
d.lookup()
case <-stopCh:
return
default:
time.Sleep(500 * time.Millisecond)
}
}
}()
d.closeFunc = func() {
ticker.Stop()
close(stopCh)
wg.Wait()
}
}
func (d *dnsDiscoverer) update() {
wg := sync.WaitGroup{}
ticker := time.NewTicker(d.lookupInterval)
stopCh := make(chan struct{})
wg.Add(1)
go func() {
defer wg.Done()
for {
select {
case <-ticker.C:
d.lookup()
case <-stopCh:
return
default:
time.Sleep(500 * time.Millisecond)
}
}
}()
d.closeFunc = func() {
ticker.Stop()
close(stopCh)
wg.Wait()
}
}
```
The default cases in these 2 methods are redundant, they will increase the
CPU usage, they should delete.
### InLong Component
InLong SDK
### Are you willing to submit PR?
- [x] Yes, I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://www.apache.org/foundation/policies/conduct)
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