P0-[4.0-bug-hunting]-[AutoRandom Key & Drainer]-create an auto_radom table leads to Drainer block

[sre-bot]

Bug Hunter issue tidb-challenge-program/bug-hunting-issue#61

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Bug Report

1. What did you do?

1. replicate data to mysql with pump + drainer
2. create a table with auto_random primary key
   create table t (a int primary key auto_random)

2. What did you expect to see?

Drainer can create table on mysql without auto_random , with hint or other ways, but not block.

3. What did you see instead?

drainer exit.

4. What version of TiDB are you using? (tidb-server -V or run select tidb_version(); on TiDB)

TiDB Version: v4.0.0-rc

[2020/04/23 17:25:42.496 +08:00] [INFO] [version.go:50] ["Welcome to Drainer"] ["Release Version"=v4.0.0-rc] ["Git Commit Hash"=b9af7839b97cfb26a71307a8b6334f2269b60a95] ["Build TS"="2020-04-08 07:55:27"] ["Go Version"=go1.13] ["Go OS/Arch"=linux/amd64]

[zimulala]

PTAL @tangenta

[tangenta]

This should be fixed in #16157.