[HDDS-4268] Prepare for Upgrade step should purge the log after waiting for the last txn to be applied.

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Labels: pull-request-available
• Target Version/s: 1.2.0
• Assignee: Aravindan Vijayan
• Reporter: Aravindan Vijayan
• Created: 22/Sep/20 16:23
• Updated: 25/Jan/21 17:14
• Resolved: 16/Nov/20 23:52

Description

This is a follow up task from HDDS-4227 in which the prepare upgrade/downgrade task should purge the Raft log immediately after waiting for the last txn to be applied. This is to make sure that we dont "apply" transactions in different versions of the code across the quorum. A lagging follower will use a Ratis snapshot to bootstrap itself on restart.

Issue Links

• links to: GitHub Pull Request #1467
• links to: GitHub Pull Request #1467