kvserver: consolidate RaftTruncatedState handling#136536
kvserver: consolidate RaftTruncatedState handling#136536craig[bot] merged 3 commits intocockroachdb:masterfrom
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But we can't rule out that there are still raft log entries around that have the zero, right? In contrived scenarios, these could pop up for application after an upgrade to the release that contains this PR. Don't we - at least technically - need a below-raft migration here?
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Good point, yeah, I'll remove this part of the PR. Unless we've had any below-raft migrations after Feb 2022. We don't need a fully-fledged migration, just the wait/sync all state machines aspect of it. Any other below-raft migration would give us this for free.
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RaftExpectedFirstIndex used to be zero before f9dee66 which started setting this field after a LooselyCoupledRaftLogTruncation version gate. Since then, the version gate has been removed, and the field is set unconditionally. But we still need to have done at least one below-raft migration to safely say that this field can't be zero. Added a TODO. Epic: none Release note: none
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TFTR! bors r=tbg |
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Build failed: |
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The CI failure in bors is unrelated: #136548. |
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bors retry |
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Build failed (retrying...): |
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bors cancel |
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Canceled. |
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CI should be fixed by #136583. Retrying to enter the queue after it. |
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bors r+ |
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Build succeeded: |
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This PR simplifies handling the
RaftTruncatedStateeval result, and adds TODO to remove a zero check after the next below-raft migration.RaftExpectedFirstIndexused to be zero before f9dee66 which started setting this field after aLooselyCoupledRaftLogTruncationversion gate. Since then, the version gate has been removed, and the field is set unconditionally.But we still need to have done at least one below-raft migration to safely say that this field can't be zero.
Related to #136109