diff options
Diffstat (limited to 'eth/downloader/downloader.go')
| -rw-r--r-- | eth/downloader/downloader.go | 50 |
1 files changed, 34 insertions, 16 deletions
diff --git a/eth/downloader/downloader.go b/eth/downloader/downloader.go index 626f47b7b..cc1ceb637 100644 --- a/eth/downloader/downloader.go +++ b/eth/downloader/downloader.go @@ -422,28 +422,46 @@ out: // in a reasonable time frame, ignore it's message. if peer := d.peers.Peer(blockPack.peerId); peer != nil { // Deliver the received chunk of blocks, and demote in case of errors - if err := d.queue.Deliver(blockPack.peerId, blockPack.blocks); err != nil { - if err == ErrInvalidChain { - // The hash chain is invalid (blocks are not ordered properly), abort - return err + err := d.queue.Deliver(blockPack.peerId, blockPack.blocks) + switch err { + case nil: + // If no blocks were delivered, demote the peer (need the delivery above) + if len(blockPack.blocks) == 0 { + peer.Demote() + peer.SetIdle() + glog.V(logger.Detail).Infof("%s: no blocks delivered", peer) + break } - // Peer did deliver, but some blocks were off, penalize + // All was successful, promote the peer + peer.Promote() + peer.SetIdle() + glog.V(logger.Detail).Infof("%s: delivered %d blocks", peer, len(blockPack.blocks)) + + case ErrInvalidChain: + // The hash chain is invalid (blocks are not ordered properly), abort + return err + + case errNoFetchesPending: + // Peer probably timed out with its delivery but came through + // in the end, demote, but allow to to pull from this peer. peer.Demote() peer.SetIdle() - glog.V(logger.Detail).Infof("%s: block delivery failed: %v", peer, err) - break - } - // If no blocks were delivered, demote the peer (above code is needed to mark the packet done!) - if len(blockPack.blocks) == 0 { + glog.V(logger.Detail).Infof("%s: out of bound delivery", peer) + + case errStaleDelivery: + // Delivered something completely else than requested, usually + // caused by a timeout and delivery during a new sync cycle. + // Don't set it to idle as the original request should still be + // in flight. + peer.Demote() + glog.V(logger.Detail).Infof("%s: stale delivery", peer) + + default: + // Peer did something semi-useful, demote but keep it around peer.Demote() peer.SetIdle() - glog.V(logger.Detail).Infof("%s: no blocks delivered", peer) - break + glog.V(logger.Detail).Infof("%s: delivery partially failed: %v", peer, err) } - // All was successful, promote the peer - peer.Promote() - peer.SetIdle() - glog.V(logger.Detail).Infof("%s: delivered %d blocks", peer, len(blockPack.blocks)) } case <-ticker.C: // Check for bad peers. Bad peers may indicate a peer not responding |