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Purge out-dated head chains on chain completion (#1538)

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## Description

There can be many head chains queued up to complete. Currently we try and process all of these to completion before we consider the node synced. 

In a chaotic network, there can be many of these and processing them to completion can be very expensive and slow. This PR removes any non-syncing head chains from the queue, and re-status's the peers. If, after we have synced to head on one chain, there is still a valid head chain to download, it will be re-established once the status has been returned. 

This should assist with getting nodes to sync on medalla faster.
This commit is contained in:
Age Manning
2020-08-18 05:22:34 +00:00
parent 3bb30754d9
commit 8311074d68
3 changed files with 24 additions and 4 deletions
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8
beacon_node/network/src/beacon_processor/chain_segment.rs
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@@ -40,19 +40,19 @@ pub fn handle_chain_segment<T: BeaconChainTypes>(
0
};
debug!(log, "Processing batch"; "batch_epoch" => epoch, "blocks" => downloaded_blocks.len(), "start_slot" => start_slot, "end_slot" => end_slot);
debug!(log, "Processing batch"; "batch_epoch" => epoch, "blocks" => downloaded_blocks.len(), "first_block_slot" => start_slot, "last_block_slot" => end_slot, "service" => "sync");
let result = match process_blocks(chain, downloaded_blocks.iter(), &log) {
(_, Ok(_)) => {
debug!(log, "Batch processed"; "batch_epoch" => epoch , "start_slot" => start_slot, "end_slot" => end_slot);
debug!(log, "Batch processed"; "batch_epoch" => epoch , "first_block_slot" => start_slot, "last_block_slot" => end_slot, "service"=> "sync");
BatchProcessResult::Success
}
(imported_blocks, Err(e)) if imported_blocks > 0 => {
debug!(log, "Batch processing failed but imported some blocks";
"batch_epoch" => epoch, "error" => e, "imported_blocks"=> imported_blocks);
"batch_epoch" => epoch, "error" => e, "imported_blocks"=> imported_blocks, "service" => "sync");
BatchProcessResult::Partial
}
(_, Err(e)) => {
debug!(log, "Batch processing failed"; "batch_epoch" => epoch, "error" => e);
debug!(log, "Batch processing failed"; "batch_epoch" => epoch, "error" => e, "service" => "sync");
BatchProcessResult::Failed
}
};