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core, eth/downloader: fix genesis state missing due to state sync (#28124)

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* core: fix chain repair corner case in path-based scheme

* eth/downloader: disable trie database whenever state sync is launched
This commit is contained in:
rjl493456442
2023-09-17 17:35:09 +03:00
committed by GitHub
parent d8a351b58f
commit c53b0fef2a
2 changed files with 63 additions and 43 deletions
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eth/downloader/downloader.go
+8 -1
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@@ -398,7 +398,14 @@ func (d *Downloader) synchronise(id string, hash common.Hash, td, ttd *big.Int,
log.Info("Block synchronisation started")
}
if mode == SnapSync {
// Snap sync uses the snapshot namespace to store potentially flakey data until
// Snap sync will directly modify the persistent state, making the entire
// trie database unusable until the state is fully synced. To prevent any
// subsequent state reads, explicitly disable the trie database and state
// syncer is responsible to address and correct any state missing.
if d.blockchain.TrieDB().Scheme() == rawdb.PathScheme {
d.blockchain.TrieDB().Reset(types.EmptyRootHash)
}
// Snap sync uses the snapshot namespace to store potentially flaky data until
// sync completely heals and finishes. Pause snapshot maintenance in the mean-
// time to prevent access.
if snapshots := d.blockchain.Snapshots(); snapshots != nil { // Only nil in tests