[DocDB] [PITR]: DDLs failing on DB2 after restore is done on DB1

[Karvy-yb]

Jira Link: DB-3101

Description

Steps followed:

1. Create new database (say DB1)
2. Create snapshot schedule for DB1
3. Note the timestamp
4. Run multiple alter commands on DB2
5. Simultaneously do a restore for DB1 to time in point#3

Restore takes longer than usual and post restore one of the alter operation fails following which all of the upcoming start throwing unexpected error.
So, there are couple of issues here:

1. Operation on DB2 failing because of restore on DB1
2. Even if one operation fails the following alter operations should not error out except one. As I am altering to add column to the table and dropping that column in a pair, only one operation should error because of failure. After which Alter should be working fine.

Finally after the script ends, I am unable to query read for the particular table. It errors out saying ERROR: Invalid argument: Invalid column number 29

This is a reproducible issue and I am attaching the SS of the outputs as well as the log files of around the time.

master_logs_0523.txt

master_logs_0522.txt

tserver_logs_0522.txt

tserver_logs_0523.txt

.