stdpain opened a new issue #5825:
URL: https://github.com/apache/incubator-doris/issues/5825
**Describe the bug**
```
==27511== Conditional jump or move depends on uninitialised value(s)
==27511== at 0x2715D74: doris::Tablet::do_tablet_meta_checkpoint()
(tablet.cpp:1150)
==27511== by 0x273E2A3:
doris::TabletManager::do_tablet_meta_checkpoint(doris::DataDir*)
(tablet_manager.cpp:1248)
==27511== by 0x26C59ED:
doris::StorageEngine::_tablet_checkpoint_callback(std::vector<doris::DataDir*,
std::allocator<doris::DataDir*> > const&)::{lambda()#1}::operator()() const
(olap_server.cpp:298)
==27511== by 0x26C8F3B: void std::__invoke_impl<void,
doris::StorageEngine::_tablet_checkpoint_callback(std::vector<doris::DataDir*,
std::allocator<doris::DataDir*> > const&)::{lambda()#1}&>(std::__invoke_other,
doris::StorageEngine::_tablet_checkpoint_callback(std::vector<doris::DataDir*,
std::allocator<doris::DataDir*> > const&)::{lambda()#1}&) (invoke.h:60)
==27511== by 0x26C8216: std::enable_if<is_invocable_r_v<void,
doris::StorageEngine::_tablet_checkpoint_callback(std::vector<doris::DataDir*,
std::allocator<doris::DataDir*> > const&)::{lambda()#1}&>,
std::enable_if>::type std::__invoke_r<void,
doris::StorageEngine::_tablet_checkpoint_callback(std::vector<doris::DataDir*,
std::allocator<doris::DataDir*> > const&)::{lambda()#1}&>(void&&,
(doris::StorageEngine::_tablet_checkpoint_callback(std::vector<doris::DataDir*,
std::allocator<doris::DataDir*> > const&)::{lambda()#1}&)...) (invoke.h:110)
==27511== by 0x26C785F: std::_Function_handler<void (),
doris::StorageEngine::_tablet_checkpoint_callback(std::vector<doris::DataDir*,
std::allocator<doris::DataDir*> >
const&)::{lambda()#1}>::_M_invoke(std::_Any_data const&) (std_function.h:291)
==27511== by 0x2A87F23: std::function<void ()>::operator()() const
(std_function.h:622)
==27511== by 0x2C1CA73: doris::FunctionRunnable::run() (threadpool.cpp:42)
==27511== by 0x2C1B43A: doris::ThreadPool::dispatch_thread()
(threadpool.cpp:548)
==27511== by 0x2C27C19: void std::__invoke_impl<void, void
(doris::ThreadPool::*&)(), doris::ThreadPool*&>(std::__invoke_memfun_deref,
void (doris::ThreadPool::*&)(), doris::ThreadPool*&) (invoke.h:73)
==27511== by 0x2C276C0: std::__invoke_result<void
(doris::ThreadPool::*&)(), doris::ThreadPool*&>::type std::__invoke<void
(doris::ThreadPool::*&)(), doris::ThreadPool*&>(void (doris::ThreadPool::*&)(),
doris::ThreadPool*&) (invoke.h:95)
==27511== by 0x2C26F5D: void std::_Bind<void
(doris::ThreadPool::*(doris::ThreadPool*))()>::__call<void, ,
0ul>(std::tuple<>&&, std::_Index_tuple<0ul>) (functional:416)
==27511==
```
_newly_created_rowset_num is a atomic variable but CXX couldn't assure
_newly_created_rowset_num is_newly_created_rowset_num default value is zero
```
WriteLock store_lock(&_meta_store_lock);
> if (_newly_created_rowset_num == 0) {
return;
}
if (UnixMillis() - _last_checkpoint_time <
config::tablet_meta_checkpoint_min_interval_secs * 1000 &&
_newly_created_rowset_num <
config::tablet_meta_checkpoint_min_new_rowsets_num) {
return;
}
```
for example:
```c++
#include <atomic>
#include <iostream>
#include <cassert>
void func() {
int cns[1024];
for(int i = 0;i < 1024; ++i) {
cns[i] = 0x3355;
}
for(int i = 0;i < 1024; ++i) {
assert(cns[i] == 0x3355);
}
}
void func2() {
std::atomic_int ans;
std::cout << ans << std::endl;
int bns;
std::cout << bns << std::endl;
}
int main() {
func();
func2();
return 0;
}
```
output:
```
1024
1024
```
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