Aravindan Vijayan created HDDS-4268:
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Summary: Prepare for Upgrade step should purge the log after
waiting for the last txn to be applied.
Key: HDDS-4268
URL: https://issues.apache.org/jira/browse/HDDS-4268
Project: Hadoop Distributed Data Store
Issue Type: Sub-task
Reporter: Aravindan Vijayan
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.
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