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Supress header download when queue is full #1753

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Aug 30, 2019
Merged

Supress header download when queue is full #1753

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4 changes: 4 additions & 0 deletions sync/src/block/downloader/header.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ use primitives::{H256, U256};
use super::super::message::RequestMessage;

const MAX_HEADER_REQUEST_LENGTH: u64 = 128;
const MAX_HEADER_QUEUE_LENGTH: usize = 1024;
const MAX_RETRY: usize = 3;
const MAX_WAIT: u64 = 15;

Expand Down Expand Up @@ -128,6 +129,9 @@ impl HeaderDownloader {
if !self.is_idle() {
return None
}
if self.queued.len() + self.downloaded.len() > MAX_HEADER_QUEUE_LENGTH {
return None
}

let pivot_number = self.pivot_header().number();

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