From bb9ddeced94671396ab50df2c57113cb48120983 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Wo=CC=81jcik?=
 <3044353+pwojcikdev@users.noreply.github.com>
Date: Sun, 27 Oct 2024 00:09:53 +0200
Subject: [PATCH] Block processor rolled back notifications on a backround
 thread

---
 nano/node/blockprocessor.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/nano/node/blockprocessor.cpp b/nano/node/blockprocessor.cpp
index f0f634dc73..de314b20e9 100644
--- a/nano/node/blockprocessor.cpp
+++ b/nano/node/blockprocessor.cpp
@@ -197,8 +197,10 @@ void nano::block_processor::rollback_competitor (secure::write_transaction const
 			logger.debug (nano::log::type::blockprocessor, "Blocks rolled back: {}", rollback_list.size ());
 		}
 
-		// Notify observers of the rolled back blocks
-		rolled_back.notify (rollback_list, fork_block.qualified_root ());
+		// Notify observers of the rolled back blocks on a background thread while not holding the ledger write lock
+		workers.post ([this, rollback_list = std::move (rollback_list), root = fork_block.qualified_root ()] () {
+			rolled_back.notify (rollback_list, root);
+		});
 	}
 }