panic time and time again if use advance statefulset

[july2993]

Bug Report

What version of Kubernetes are you using?

What version of TiDB Operator are you using?

v1.2.6

What did you do?

observe controller restarts

kNAME                                               READY   STATUS    RESTARTS   AGE
advanced-statefulset-controller-7786b96bcc-bw2gk   1/1     Running   1          30h
tidb-controller-manager-55c464db78-nqfpj           1/1     Running   20         30h

check logs k logs tidb-controller-manager-55c464db78-nqfpj -p -n tidb-admin

E0208 06:36:18.467917       1 runtime.go:76] Observed a panic: unreachable
goroutine 4521 [running]:
k8s.io/apimachinery/pkg/util/runtime.logPanic(0x1b1b2e0, 0x2247850)
	k8s.io/[email protected]/pkg/util/runtime/runtime.go:74 +0xa3
k8s.io/apimachinery/pkg/util/runtime.HandleCrash(0x0, 0x0, 0x0)
	k8s.io/[email protected]/pkg/util/runtime/runtime.go:48 +0x82
panic(0x1b1b2e0, 0x2247850)
	runtime/panic.go:679 +0x1b2
github.com/pingcap/advanced-statefulset/client/apis/apps/v1/helper.(*hijackWatch).receive(0xc001116090)
	github.com/pingcap/advanced-statefulset/[email protected]/apis/apps/v1/helper/hijack.go:165 +0x2c5
created by github.com/pingcap/advanced-statefulset/client/apis/apps/v1/helper.newHijackWatch
	github.com/pingcap/advanced-statefulset/[email protected]/apis/apps/v1/helper/hijack.go:140 +0x9f
panic: unreachable [recovered]
	panic: unreachable

goroutine 4521 [running]:
k8s.io/apimachinery/pkg/util/runtime.HandleCrash(0x0, 0x0, 0x0)
	k8s.io/[email protected]/pkg/util/runtime/runtime.go:55 +0x105
panic(0x1b1b2e0, 0x2247850)
	runtime/panic.go:679 +0x1b2
github.com/pingcap/advanced-statefulset/client/apis/apps/v1/helper.(*hijackWatch).receive(0xc001116090)
	github.com/pingcap/advanced-statefulset/[email protected]/apis/apps/v1/helper/hijack.go:165 +0x2c5
created by github.com/pingcap/advanced-statefulset/client/apis/apps/v1/helper.newHijackWatch
	github.com/pingcap/advanced-statefulset/[email protected]/apis/apps/v1/helper/hijack.go:140 +0x9f

~~guest it panic at Bookmark type~~

What did you expect to see? should have no panic What did you see instead? may panic time and time