Fiber hangs while executing snapshot concurrently with vinyl index build #10233
Description
Bug description
If vinyl index build and snapshot are executed concurrently, one of them may hang.
Originally reported by @ligurio.
Reproduced with Tarantool 3.2.0-entrypoint-112-g319357d5973d.
Steps to reproduce
Run the script:
local log = require('log')
local fiber = require('fiber')
box.cfg{}
local s = box.schema.space.create('test', {engine = 'vinyl'})
s:create_index('pk')
s:insert({1, 1})
local f1 = fiber.new(s.create_index, s, 'sk', {parts = {2, 'unsigned'}})
f1:set_joinable(true)
local f2 = fiber.new(box.snapshot)
f2:set_joinable(true)
fiber.sleep(0.1)
local ok, err
local timeout = 3
ok, err = f1:join(timeout)
if not ok then
log.error('Failed to join ddl fiber')
box.error(err)
end
ok, err = f2:join(timeout)
if not ok then
log.error('Failed to join snapshot fiber')
box.error(err)
end
os.exit(0)Actual behavior
The script fails with the error:
2024-07-11 17:47:06.763 [76468] main/104/test.lua/test test.lua:33 E> Failed to join snapshot fiber
2024-07-11 17:47:06.763 [76468] main fiber.c:855 E> TimedOut: timed out
Expected behavior
No error.