[Tarantool-patches] [PATCH] fio: fix race condition in mktree

[HustonMmmavr]

This patch fixes a bug that occours when two instances calls
fio.mktree for the same directory in parallel.

Closes #4660
---
branch: https://github.com/tarantool/tarantool/tree/HustonMmmavr/gh-4660-fix-fio-mktree-race
issue: https://github.com/tarantool/tarantool/issues/4660

 src/lua/fio.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lua/fio.lua b/src/lua/fio.lua
index cb224f3d0..c9aeac951 100644
--- a/src/lua/fio.lua
+++ b/src/lua/fio.lua
@@ -364,7 +364,7 @@ fio.mktree = function(path, mode)
         local stat = fio.stat(current_dir)
         if stat == nil then
             local st, err = fio.mkdir(current_dir, mode)
-            if err ~= nil  then
+            if err ~= nil and not fio.path.is_dir(current_dir) then
                 return false, string.format("Error creating directory %s: %s",
                     current_dir, tostring(err))
             end
-- 
2.23.0