autoid service dead loop

[tiancaiamao]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

I don't know how to trigger it.
But when the bug happen, there will be a dead loop like this:

goroutine 461 [sleep]:
time.Sleep(0xbebc200)
	/usr/local/go/src/runtime/time.go:195 +0x135
[github.com/pingcap/tidb/meta/autoid.(*singlePointAlloc).rebase](http://github.com/pingcap/tidb/meta/autoid.(*singlePointAlloc).rebase)(0xc001530360, {0x4b9f3d0, 0xc000b563c0}, 0x0, 0x0)
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/meta/autoid/autoid_service.go:194](http://github.com/pingcap/br/meta/autoid/autoid_service.go:194) +0x45
[github.com/pingcap/tidb/meta/autoid.(*singlePointAlloc).Rebase](http://github.com/pingcap/tidb/meta/autoid.(*singlePointAlloc).Rebase)(0x4bc7970?, {0x4b9f3d0, 0xc000b563c0}, 0xc000e8c340?, 0xb0?)
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/meta/autoid/autoid_service.go:176](http://github.com/pingcap/br/meta/autoid/autoid_service.go:176) +0x1e9
[github.com/pingcap/tidb/br/pkg/lightning/restore.rebaseGlobalAutoID](http://github.com/pingcap/tidb/br/pkg/lightning/restore.rebaseGlobalAutoID)({0x4b9f3d0, 0xc000b563c0}, 0x7?, {0x4bc7970?, 0xc0005c3270?}, 0xc001c93400?, 0x1?)
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/restore/meta_manager.go:1178](http://github.com/pingcap/br/br/pkg/lightning/restore/meta_manager.go:1178) +0x6f
[github.com/pingcap/tidb/br/pkg/lightning/restore.(*dbTableMetaMgr).AllocTableRowIDs.func1.1](http://github.com/pingcap/tidb/br/pkg/lightning/restore.(*dbTableMetaMgr).AllocTableRowIDs.func1.1)({0x4b9f3d0, 0xc000b563c0}, 0xc000b563c0?)
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/restore/meta_manager.go:258](http://github.com/pingcap/br/br/pkg/lightning/restore/meta_manager.go:258) +0x81d
[github.com/pingcap/tidb/br/pkg/lightning/common.SQLWithRetry.Transact.func1()](http://github.com/pingcap/tidb/br/pkg/lightning/common.SQLWithRetry.Transact.func1())
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/common/util.go:210](http://github.com/pingcap/br/br/pkg/lightning/common/util.go:210) +0x94
[github.com/pingcap/tidb/br/pkg/lightning/common.Retry](http://github.com/pingcap/tidb/br/pkg/lightning/common.Retry)({0x44bba04, 0x19}, {0xc001c938e8?}, 0xc001f757c0)
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/common/util.go:172](http://github.com/pingcap/br/br/pkg/lightning/common/util.go:172) +0x1ff
[github.com/pingcap/tidb/br/pkg/lightning/common.SQLWithRetry.perform(...)](http://github.com/pingcap/tidb/br/pkg/lightning/common.SQLWithRetry.perform(...))
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/common/util.go:157](http://github.com/pingcap/br/br/pkg/lightning/common/util.go:157)
[github.com/pingcap/tidb/br/pkg/lightning/common.SQLWithRetry.Transact](http://github.com/pingcap/tidb/br/pkg/lightning/common.SQLWithRetry.Transact)({{0x4b9f4e8?, 0xc0005324e0?}, {0xc001af2070?}, 0x60?}, {0x4b9f3d0?, 0xc000b563c0?}, {0x44bba04?, 0xf?}, 0x0?)
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/common/util.go:204](http://github.com/pingcap/br/br/pkg/lightning/common/util.go:204) +0xbb
[github.com/pingcap/tidb/br/pkg/lightning/restore.(*dbTableMetaMgr).AllocTableRowIDs.func1()](http://github.com/pingcap/tidb/br/pkg/lightning/restore.(*dbTableMetaMgr).AllocTableRowIDs.func1())
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/restore/meta_manager.go:192](http://github.com/pingcap/br/br/pkg/lightning/restore/meta_manager.go:192) +0x14e
[github.com/pingcap/tidb/br/pkg/lightning/restore.(*dbTableMetaMgr).AllocTableRowIDs](http://github.com/pingcap/tidb/br/pkg/lightning/restore.(*dbTableMetaMgr).AllocTableRowIDs)(0xc000b56ab0, {0x4b9f3d0, 0xc000b563c0}, 0x33334c2)
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/restore/meta_manager.go:292](http://github.com/pingcap/br/br/pkg/lightning/restore/meta_manager.go:292) +0x473
[github.com/pingcap/tidb/br/pkg/lightning/restore.(*TableRestore).restoreTable](http://github.com/pingcap/tidb/br/pkg/lightning/restore.(*TableRestore).restoreTable)(0xc001af20e0, {0x4b9f3d0, 0xc000b563c0}, 0xc0005f6180, 0xc002198340)
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/restore/restore.go:1761](http://github.com/pingcap/br/br/pkg/lightning/restore/restore.go:1761) +0x37c
[github.com/pingcap/tidb/br/pkg/lightning/restore.(*Controller).restoreTables.func6()](http://github.com/pingcap/tidb/br/pkg/lightning/restore.(*Controller).restoreTables.func6())
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/restore/restore.go:1560](http://github.com/pingcap/br/br/pkg/lightning/restore/restore.go:1560) +0x125
created by [github.com/pingcap/tidb/br/pkg/lightning/restore.(*Controller).restoreTables](http://github.com/pingcap/tidb/br/pkg/lightning/restore.(*Controller).restoreTables)
	/home/jenkins/agent/workspace/build-common/go/src/[github.com/pingcap/br/br/pkg/lightning/restore/restore.go:1555](http://github.com/pingcap/br/br/pkg/lightning/restore/restore.go:1555) +0xbcf

2. What did you expect to see? (Required)

service available

3. What did you see instead (Required)

Dead loop, and auto id service retry forever.

4. What is your TiDB version? (Required)

master @11ab7b49537560fc422eb7a5a01a771f28c144dd