bsglz commented on pull request #1909:
URL: https://github.com/apache/hbase/pull/1909#issuecomment-660782480
> Is the operation expensive?
In my local env, the code below cost about 1μs~200μs, avg<5μs, much lesser
than 1ms.
```
try {
currentHost = DNS.getDefaultHost("default", "default");
} catch (Exception e) {
// Just ignore, it's ok, avoid too many log info
}
```
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