mvcc: failing index count limit assertion #11929
Description
Steps to reproduce
Run the following init.lua script:
fiber = require('fiber')
local params = require('internal.argparse').parse(arg, {
{ 'memtx_use_mvcc_engine', 'boolean' },
{ 'index_count', 'number' },
})
local memtx_use_mvcc_engine = params.memtx_use_mvcc_engine
local index_count = params.index_count
local function space_format(num_fields)
local space_format = {}
for i = 1, num_fields do
table.insert(space_format, {
name = ('field_%d'):format(i),
type = 'unsigned',
})
end
return space_format
end
local function index_opts(format, field_id)
return {parts={{format[field_id].name}}, unique=true}
end
box.cfg{memtx_use_mvcc_engine=memtx_use_mvcc_engine}
box.schema.space.create("test")
local format = space_format(index_count)
box.space.test:format(format)
for i = 1, index_count do
box.space.test:create_index(
('idx_%d'):format(i),
index_opts(format, i)
)
end
local tuple = {}
for _ = 1, index_count do table.insert(tuple, 1) end
box.space.test:replace(tuple)
box.space.test:drop()
os.exit()With the following arguments:
$ tarantool init.lua --index_count 128 #OK
$ tarantool init.lua --index_count 129
...
2025-10-14 19:41:35.450 [31141] main init.lua:34 E> Can't create or modify index 'idx_129' in space 'test': index id too big {"type":"ClientError","code":14,"name":"MODIFY_INDEX","index":"idx_129","space":"test","details":"index id too big","trace":[{"file":"init.lua","line":34}]}
2025-10-14 19:41:35.450 [31141] main say.c:85 F> fatal error, exiting the event loop
$ tarantool init.lua --index_count 128 --memtx_use_mvcc_engine
tarantool: ./src/box/memtx_tx.c:1129: memtx_tx_story_new: Assertion `index_count < BOX_INDEX_MAX' failed.
Aborted (core dumped)
$ tarantool init.lua --index_count 129 --memtx_use_mvcc_engine
...
2025-10-14 19:41:35.450 [31141] main init.lua:34 E> Can't create or modify index 'idx_129' in space 'test': index id too big {"type":"ClientError","code":14,"name":"MODIFY_INDEX","index":"idx_129","space":"test","details":"index id too big","trace":[{"file":"init.lua","line":34}]}
2025-10-14 19:41:35.450 [31141] main say.c:85 F> fatal error, exiting the event loop
Actual behavior
Assert fails.
Expected behavior
Assert doesn't fails.