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remove potential double read lock during compaction

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This commit is contained in:
Yeastplume 2022-09-01 12:11:49 +01:00
parent 6412fd1a8e
commit 3524b70211
1 changed files with 6 additions and 2 deletions
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8
chain/src/chain.rs
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@ -1218,6 +1218,7 @@ impl Chain {
fn remove_historical_blocks(
&self,
header_pmmr: &txhashset::PMMRHandle<BlockHeader>,
archive_header: BlockHeader,
batch: &store::Batch<'_>,
) -> Result<(), Error> {
if self.archive_mode() {
@ -1238,7 +1239,6 @@ impl Chain {
// TODO: Check this, compaction selects a different horizon
// block from txhashset horizon/PIBD segmenter when using
// Automated testing chain
let archive_header = self.txhashset_archive_header()?;
if archive_header.height < cutoff {
cutoff = archive_header.height;
horizon = head.height - archive_header.height;
@ -1298,6 +1298,10 @@ impl Chain {
}
}
// Retrieve archive header here, so as not to attempt a read
// lock while removing historical blocks
let archive_header = self.txhashset_archive_header()?;
// Take a write lock on the txhashet and start a new writeable db batch.
let header_pmmr = self.header_pmmr.read();
let mut txhashset = self.txhashset.write();
@ -1317,7 +1321,7 @@ impl Chain {
// If we are not in archival mode remove historical blocks from the db.
if !self.archive_mode() {
self.remove_historical_blocks(&header_pmmr, &batch)?;
self.remove_historical_blocks(&header_pmmr, archive_header, &batch)?;
}
// Make sure our output_pos index is consistent with the UTXO set.