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Make sure parent block is not in importing queue when importing ancient blocks (#10138) 

* Make sure parent block is not in importing queue when importing ancient blocks

* Clear queue when an ancient import fails

* Lock only once in clear

* Add comments why queued check is needed

* Should push the value back to the queue

* Directly check in chain.read()

* Remove extra empty line

* Revert unused verification change
This commit is contained in:
Wei Tang 2019-01-09 14:47:14 +01:00 committed by Andronik Ordian
parent f9a8aac036
commit 010cfb7d67
1 changed files with 6 additions and 5 deletions
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11
ethcore/src/client/client.rs
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@ -2165,11 +2165,8 @@ impl IoClient for Client {
// NOTE To prevent race condition with import, make sure to check queued blocks first
// (and attempt to acquire lock)
let is_parent_pending = self.queued_ancient_blocks.read().0.contains(&parent_hash);
if !is_parent_pending {
let status = self.block_status(BlockId::Hash(parent_hash));
if status == BlockStatus::Unknown {
bail!(EthcoreErrorKind::Block(BlockError::UnknownParent(parent_hash)));
}
if !is_parent_pending && !self.chain.read().is_known(&parent_hash) {
bail!(EthcoreErrorKind::Block(BlockError::UnknownParent(parent_hash)));
}
}
@ -2199,6 +2196,10 @@ impl IoClient for Client {
);
if let Err(e) = result {
error!(target: "client", "Error importing ancient block: {}", e);
let mut queued = queued.write();
queued.0.clear();
queued.1.clear();
}
// remove from pending
queued.write().0.remove(&hash);