br: TiDB panic during restoring data with runtime error: invalid memory address or nil pointer dereference

[Yui-Song]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

Restore data of bank workload from minio

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

The data restore successfully

3. What did you see instead (Required)

DataBase Restore <---------------------------------------\\..................................> 53.28%DataBase Restore <-----------------------
----------------|..................................> 53.28%panic: runtime error: invalid memory address or nil pointer dereference\n[signal SIGSEGV: segmentation violation code=0x1
addr=0x0 pc=0x3ab0170]\n\ngoroutine 760 [running]:\ngit.luolix.top/pingcap/tidb/statistics/handle.(*Handle).SaveStatsToStorage(0x0, 0xc7, 0x186a0, 0x0?, 0x0, 0xc0047b46c0, 0x1d12aeb?, 0
x0?, 0x55a4de0?, 0x1, ...)\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/statistics/handle/handle.go:1555 +0x130\ngit.luolix.top/pingcap/tidb/statistics/han
dle.(*Handle).loadStatsFromJSON(0xc001c86cd0?, 0xc001c86c08?, 0x4?, 0xc001c86c08?)\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/statistics/handle/dump.
go:382 +0x112\ngit.luolix.top/pingcap/tidb/statistics/handle.(*Handle).LoadStatsFromJSON(0xc000524a80?, {0x634b6e8, 0xc001d6c000}, 0xc000eb52d0)\n\t/home/jenkins/agent/workspace/build-c
ommon/go/src/github.com/pingcap/br/statistics/handle/dump.go:347 +0x14f\ngit.luolix.top/pingcap/tidb/br/pkg/restore.(*Client).updateMetaAndLoadStats(0xc000c1bd40, {0x6314ad0, 0xc000e2ef
f0}, 0xc00267d320)\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/br/pkg/restore/client.go:1777 +0x6c5\ngit.luolix.top/pingcap/tidb/br/pkg/restore.(*Client).
GoValidateChecksum.func1()\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/br/pkg/restore/client.go:1626 +0x68\ncreated by github.com/pingcap/tidb/br/pkg/
restore.(*Client).GoValidateChecksum\n\t/home/jenkins/agent/workspace/build-common/go/src/github.com/pingcap/br/br/pkg/restore/client.go:1624 +0x185"]

The last few lines of br.log

[2023/06/07 20:35:50.412 +08:00] [INFO] [pipeline_items.go:394] ["restore batch done"] [ranges="{total=128,ranges=\"[\\\"[7480000000000000BB5F69800000000000000100, 7480000000000000BB5F698000000000000001040DE0B6B3A7767169040000000000000065)\\\",\\\"(skip 126)\\\",\\\"[7480000000000000BD5F698000000000000001040DE0B6B3A876DFB9040000000000000065040000000000000001, 7480000000000000BD5F698000000000000001040DE0B6B3A8890785040000000000000065040000000000000001)\\\"]\",totalFiles=129,totalKVs=119203973,totalBytes=7324266166,totalSize=7324266166}"]
[2023/06/07 20:35:50.412 +08:00] [INFO] [pipeline_items.go:118] ["restore table done"] [tables="[`bank`.`inner_bill`,`bank`.`account_verify`,`bank`.`account_deposit_aggreement`,`bank`.`currency`]"]
[2023/06/07 20:35:50.412 +08:00] [WARN] [client.go:1686] ["table has no checksum, skipping checksum"] [db=bank] [table=account_verify]
[2023/06/07 20:35:50.412 +08:00] [WARN] [client.go:1686] ["table has no checksum, skipping checksum"] [db=bank] [table=inner_bill]
[2023/06/07 20:35:50.414 +08:00] [INFO] [client.go:1744] ["success in validate checksum"] [db=bank] [table=currency]
[2023/06/07 20:35:50.418 +08:00] [INFO] [client.go:1772] ["start loads analyze after validate checksum"] ["old id"=201] ["new id"=201]

4. What is your TiDB version? (Required)

| Release Version: v7.2.0-alpha
Edition: Community
Git Commit Hash: aedbcd0
Git Branch: heads/refs/tags/v7.2.0-alpha
UTC Build Time: 2023-06-07 10:42:08
GoVersion: go1.20.3
Race Enabled: false
Check Table Before Drop: false
Store: tikv |