Merge pull request #66595 from hanxiaoshuai/fix0725

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

when hashsize is Invalid, add an error log

**What this PR does / why we need it**:
when hashsize is Invalid, add an error log
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

pkg/util/ipset/ipset.go

@@ -111,7 +111,7 @@ func (set *IPSet) Validate() bool {
 	}
 	// check hash size value of ipset
 	if set.HashSize <= 0 {
-
+		glog.Errorf("Invalid hashsize value %d, should be >0", set.HashSize)
 		return false
 	}
 	// check max elem value of ipset