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core: fix unnecessary ancestor lookup after a fast sync (#17825)

This commit is contained in:
Péter Szilágyi 2018-10-03 13:42:19 +03:00 committed by GitHub
parent d3a773c284
commit 14bef9a2db
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1 changed files with 5 additions and 5 deletions
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10
core/chain_indexer.go
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@ -219,13 +219,13 @@ func (c *ChainIndexer) eventLoop(currentHeader *types.Header, events chan ChainE
}
header := ev.Block.Header()
if header.ParentHash != prevHash {
// Reorg to the common ancestor (might not exist in light sync mode, skip reorg then)
// Reorg to the common ancestor if needed (might not exist in light sync mode, skip reorg then)
// TODO(karalabe, zsfelfoldi): This seems a bit brittle, can we detect this case explicitly?
// TODO(karalabe): This operation is expensive and might block, causing the event system to
// potentially also lock up. We need to do with on a different thread somehow.
if h := rawdb.FindCommonAncestor(c.chainDb, prevHeader, header); h != nil {
c.newHead(h.Number.Uint64(), true)
if rawdb.ReadCanonicalHash(c.chainDb, prevHeader.Number.Uint64()) != prevHash {
if h := rawdb.FindCommonAncestor(c.chainDb, prevHeader, header); h != nil {
c.newHead(h.Number.Uint64(), true)
}
}
}
c.newHead(header.Number.Uint64(), false)