lightning import partition tables failed due to "non-retryable error: read index not ready, reason can not read index due to split"

[fubinzh]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1. Use lightning to import test data of 1.5K partition table

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

Lightning import should succeed

3. What did you see instead (Required)

Lightning import failed due to "non-retryable error: read index not ready, reason can not read index due to split, region 64037"

[2022/07/25 04:52:58.753 +00:00] [INFO] [table_restore.go:1015] ["analyze completed"] [table=`new_data`.`PK_LCP9284`] [takeTime=2.401747315s] []
[2022/07/25 04:52:58.758 +00:00] [ERROR] [restore.go:1494] ["restore all tables data failed"] [takeTime=55m14.0129788s] [error="[Lightning:Restore:ErrRestoreTable]restore table `new_data`.`UK_LP17285` failed: non-retryable error: read index not ready, reason can not read index due to split, region 64037"]
[2022/07/25 04:52:58.758 +00:00] [ERROR] [restore.go:456] ["run failed"] [step=4] [error="[Lightning:Restore:ErrRestoreTable]restore table `new_data`.`UK_LP17285` failed: non-retryable error: read index not ready, reason can not read index due to split, region 64037"]
[2022/07/25 04:52:58.758 +00:00] [INFO] [restore.go:1137] ["everything imported, stopping periodic actions"]
[2022/07/25 04:52:58.758 +00:00] [ERROR] [restore.go:466] ["the whole procedure failed"] [takeTime=57m20.978459058s] [error="[Lightning:Restore:ErrRestoreTable]restore table `new_data`.`UK_LP17285` failed: non-retryable error: read index not ready, reason can not read index due to split, region 64037"]
[2022/07/25 04:52:58.758 +00:00] [ERROR] [restore.go:167] ["tables failed to be imported"] [count=2]
[2022/07/25 04:52:58.758 +00:00] [ERROR] [restore.go:169] [-] [table=`new_data`.`UK_LP17285`] [status=imported] [error="non-retryable error: read index not ready, reason can not read index due to split, region 64037"]
[2022/07/25 04:52:58.758 +00:00] [ERROR] [restore.go:169] [-] [table=`new_data`.`IDT_LP24677`] [status=imported] [error="non-retryable error: read index not ready, reason can not read index due to split, region 71138"]
[2022/07/25 04:52:58.763 +00:00] [INFO] [checksum.go:459] ["service safe point keeper exited"]
[2022/07/25 04:52:58.763 +00:00] [ERROR] [main.go:103] ["tidb lightning encountered error stack info"] [error="[Lightning:Restore:ErrRestoreTable]restore table `new_data`.`UK_LP17285` failed: non-retryable error: read index not ready, reason can not read index due to split, region 64037"]

4. What is your TiDB version? (Required)

[2022/07/25 03:55:37.272 +00:00] [INFO] [info.go:49] ["Welcome to TiDB-Lightning"] [release-version=v6.2.0] [git-hash=0ea937e56adac89ea7df1ce5406c7dc20a3f83ae] [git-branch=heads/refs/tags/v6.2.0] [go-version=go1.18.2] [utc-build-time="2022-07-23 10:05:04"] [race-enabled=false]