(2.14?) NRG: WAL must align with snapshot #7620
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MauriceVanVeen
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sciascid
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sciascid
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Dec 5, 2025
server/raft_test.go
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| // Stop current node and restart it. | ||
| n.Stop() | ||
| n.WaitForStop() | ||
| // Restart. | ||
| n.Stop() | ||
| n.WaitForStop() |
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Ah, just left around due to copy pasting, resolved now.
Signed-off-by: Maurice van Veen <[email protected]>
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The Raft log can have three states:
We previously were not checking that these align, this would allow for the snapshot to be non-existent but the WAL to be way ahead or there to be a gap (somehow) between the snapshot and WAL itself. Both could lead to data loss.
Normally this shouldn't be an issue though, as these will always align. But, could potentially happen if a snapshot and the tail of the WAL were durably written, but somehow the head of the WAL was not.
Signed-off-by: Maurice van Veen [email protected]