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fix: address race condition during EuclidV2 header chain verification (#1186)

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Péter Garamvölgyi 2025-05-14 15:34:00 +02:00 committed by GitHub
parent 0b6f8f1889
commit 2500647c49
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GPG key ID: B5690EEEBB952194
2 changed files with 30 additions and 5 deletions
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33
consensus/wrapper/consensus.go
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@ -59,6 +59,31 @@ func (ue *UpgradableEngine) VerifyHeader(chain consensus.ChainHeaderReader, head
return ue.chooseEngine(header.Time).VerifyHeader(chain, header, seal)
}
func waitForHeader(chain consensus.ChainHeaderReader, header *types.Header) {
hash, number := header.Hash(), header.Number.Uint64()
// poll every 2 seconds, should succeed after a few tries
ticker := time.NewTicker(2 * time.Second)
defer ticker.Stop()
// we give up after 2 minutes
timeout := time.After(120 * time.Second)
for {
select {
case <-ticker.C:
// try reading from chain, if the header is present then we are ready
if h := chain.GetHeader(hash, number); h != nil {
return
}
case <-timeout:
log.Warn("Unable to find last pre-EuclidV2 header in chain", "hash", hash.Hex(), "number", number)
return
}
}
}
// VerifyHeaders verifies a batch of headers concurrently. In our use-case,
// headers can only be all system, all clique, or start with clique and then switch once to system.
func (ue *UpgradableEngine) VerifyHeaders(chain consensus.ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) {
@ -124,10 +149,10 @@ func (ue *UpgradableEngine) VerifyHeaders(chain consensus.ChainHeaderReader, hea
}
}
// Not sure why we need this here, but without this we get err="unknown ancestor"
// at the 1st Euclid block. It seems that `VerifyHeaders` start processing the next
// header before the previous one was written into `chain`.
time.Sleep(2 * time.Second)
// `VerifyHeader` will try to call `chain.GetHeader`, which will race with `InsertHeaderChain`.
// This might result in "unknown ancestor" header validation error.
// This should be temporary, so we solve this by waiting here.
waitForHeader(chain, cliqueHeaders[len(cliqueHeaders)-1])
// Verify system contract headers.
log.Info("Start EuclidV2 transition verification in SystemContract section", "startBlockNumber", systemHeaders[0].Number, "endBlockNumber", systemHeaders[len(systemHeaders)-1].Number)

2
params/version.go
View file

@ -24,7 +24,7 @@ import (
const (
VersionMajor = 5 // Major version component of the current release
VersionMinor = 8 // Minor version component of the current release
VersionPatch = 45 // Patch version component of the current release
VersionPatch = 46 // Patch version component of the current release
VersionMeta = "mainnet" // Version metadata to append to the version string
)