From 0df5a6c08a4f3ed39f44e8518c24883ab1f43c95 Mon Sep 17 00:00:00 2001
From: pwd123 <46750216+dlscjf151@users.noreply.github.com>
Date: Mon, 6 Nov 2023 20:39:10 +0900
Subject: [PATCH] add rollback tx at GetVoteOnHash #8637 (#8660)

At `turbo/jsonrpc/bor_snapshot.go:239` creates read only transaction and
acquire semaphore but does not rollback or commit transaction and
unrelease semaphore lock. Over time, this will result in the locking all
of semaphore resources. Any other resources can't acquire semaphore.

I added defer function to rollback transaction to release semaphore.
---
 turbo/jsonrpc/bor_snapshot.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/turbo/jsonrpc/bor_snapshot.go b/turbo/jsonrpc/bor_snapshot.go
index a6793ceee..7a6ef67f4 100644
--- a/turbo/jsonrpc/bor_snapshot.go
+++ b/turbo/jsonrpc/bor_snapshot.go
@@ -241,6 +241,7 @@ func (api *BorImpl) GetVoteOnHash(ctx context.Context, starBlockNr uint64, endBl
 	if err != nil {
 		return false, err
 	}
+	defer tx.Rollback()
 
 	service := whitelist.GetWhitelistingService()