[CASSANDRA-11801] Add ability to disable schema changes, repairs, bootstraps, etc (during upgrades)

• Type: Improvement
• Status: Open
• Priority: Normal
• Resolution: Unresolved
• Component/s: Legacy/Distributed Metadata, Local/Startup and Shutdown
• Labels: gsoc2021 mentor
• Complexity: Normal
• Assignee: Unassigned
• Reporter: Tom Hobbs

Reviewers

Paulo Motta

• Created: 13/May/16 18:48
• Updated: 09/Mar/21 12:33

Description

There are a lot of operations that aren't supposed to be run in a mixed version cluster: schema changes, repairs, topology changes, etc. However, it's easily possible for these operations to be accidentally run by a script, another user unaware of the upgrade, or an operator that's not aware of these rules.

We should make it easy to follow the rules by making it possible to prevent/disable all of these operations through nodetool commands. At the start of an upgrade, an operator can disable all of these until the upgrade has been completed.

Issue Links

• relates to: CASSANDRA-9078 Fail repair when cluster is in a mixed version state
• relates to: CASSANDRA-10619 disallow streaming operations while upgrading