A sufficient number of cascade rollbacks block the WAL #11081
Description
Bug description
On cascade rollback WAL queue size is miscalculated and as a result writing to WAL is completely blocked.
Steps to reproduce
Run next script:
os.execute('rm -f *.snap *.xlog *.vylog')
box.cfg{log_level = 'warn', wal_queue_max_size = 100}
local s = box.schema.create_space('test')
s:create_index('pk')
box.error.injection.set('ERRINJ_WAL_IO', true)
pcall(s.insert, s, {1, string.rep('a', 1000)})
box.error.injection.set('ERRINJ_WAL_IO', false)
-- Now journal queue size is beyound threshold forever and operations are stuck.
s:insert({1})
os.exit()Actual behavior
Hangs.
Expected behavior
Do the insertion successfully.