From 98ccec64c50b4af92cfbe054eddb835a9375b6cc Mon Sep 17 00:00:00 2001
From: Juhyung Park <jh@codechain.io>
Date: Mon, 23 Sep 2019 12:13:56 +0900
Subject: [PATCH] Import following downloaded blocks if the preceding block is
 already queued

Before this commit, following blocks were dropped and this behavior
was causing "parent not found" errors in Block Sync.
---
 sync/src/block/extension.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sync/src/block/extension.rs b/sync/src/block/extension.rs
index 01cdb59852..d865a56fd2 100644
--- a/sync/src/block/extension.rs
+++ b/sync/src/block/extension.rs
@@ -728,6 +728,9 @@ impl Extension {
                     Err(BlockImportError::Import(ImportError::AlreadyInChain)) => {
                         cwarn!(SYNC, "Downloaded already existing block({})", hash)
                     }
+                    Err(BlockImportError::Import(ImportError::AlreadyQueued)) => {
+                        cwarn!(SYNC, "Downloaded already queued in the verification queue({})", hash)
+                    }
                     Err(err) => {
                         // FIXME: handle import errors
                         cwarn!(SYNC, "Cannot import block({}): {:?}", hash, err);