morningman opened a new issue #4001:
URL: https://github.com/apache/incubator-doris/issues/4001
**Describe the bug**
```
#0 data_dir (this=0x0) at /doris/core/be/src/olap/base_tablet.h:82
#1 scan_disk (this=0x260ba240) at /doris/core/be/src/exec/olap_scanner.h:86
#2 doris::OlapScanNode::start_scan_thread (this=this@entry=0x4135d000,
state=state@entry=0x15c97800) at /doris/core/be/src/exec/olap_scan_node.cpp:686
#3 0x0000000001600aa1 in doris::OlapScanNode::start_scan
(this=this@entry=0x4135d000, state=state@entry=0x15c97800) at
/doris/core/be/src/exec/olap_scan_node.cpp:373
#4 0x0000000001601609 in doris::OlapScanNode::get_next (this=0x4135d000,
state=0x15c97800, row_batch=0x7f9a83f5f350, eos=0x7f9a83f5f278) at
/doris/core/be/src/exec/olap_scan_node.cpp:204
#5 0x00000000015edf9e in doris::TopNNode::open (this=0x3c296000,
state=0x15c97800) at /doris/core/be/src/exec/topn_node.cpp:107
#6 0x00000000011723c4 in doris::PlanFragmentExecutor::open_internal
(this=this@entry=0x3c2973b0) at
/doris/core/be/src/runtime/plan_fragment_executor.cpp:275
#7 0x0000000001172d49 in doris::PlanFragmentExecutor::open
(this=this@entry=0x3c2973b0) at
/doris/core/be/src/runtime/plan_fragment_executor.cpp:259
#8 0x00000000010f2c0e in doris::FragmentExecState::execute
(this=0x3c297340) at /doris/core/be/src/runtime/fragment_mgr.cpp:212
#9 0x00000000010f3c85 in
doris::FragmentMgr::exec_actual(std::shared_ptr<doris::FragmentExecState>,
std::function<void (doris::PlanFragmentExecutor*)>) (this=0x509d500,
exec_state=..., cb=...)
at /doris/core/be/src/runtime/fragment_mgr.cpp:399
#10 0x00000000010fba34 in operator() (a2=<error reading variable: access
outside bounds of object referenced via synthetic pointer>, a1=...,
p=<optimized out>, this=<optimized out>)
at /doris/thirdparty/installed/include/boost/bind/mem_fn_template.hpp:280
#11 operator()<boost::_mfi::mf2<void, doris::FragmentMgr,
std::shared_ptr<doris::FragmentExecState>,
std::function<void(doris::PlanFragmentExecutor*)> >, boost::_bi::list0>
(a=<synthetic pointer>, f=..., this=<optimized out>)
at /doris/thirdparty/installed/include/boost/bind/bind.hpp:398
#12 operator() (this=<optimized out>) at
/doris/thirdparty/installed/include/boost/bind/bind.hpp:1294
#13
boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void,
boost::_mfi::mf2<void, doris::FragmentMgr,
std::shared_ptr<doris::FragmentExecState>, std::function<void
(doris::PlanFragmentExecutor*)> >,
boost::_bi::list3<boost::_bi::value<doris::FragmentMgr*>,
boost::_bi::value<std::shared_ptr<doris::FragmentExecState> >,
boost::_bi::value<std::function<void (doris::PlanFragmentExecutor*)> > > >,
void>::invoke(boost::detail::function::function_buffer&) (function_obj_ptr=...)
at
/doris/thirdparty/installed/include/boost/function/function_template.hpp:159
#14 0x00000000010bd00a in operator() (this=0x7f9a83f5f838) at
/doris/thirdparty/installed/include/boost/function/function_template.hpp:759
#15 doris::PriorityThreadPool::work_thread (this=0x509d580,
thread_id=<optimized out>) at
/doris/core/be/src/util/priority_thread_pool.hpp:138
#16 0x0000000001c8436d in thread_proxy ()
#17 0x00007f9ad98481c3 in start_thread () from /gcc/lib64/libpthread.so.0
#18 0x00007f9ad927712d in clone () from /gcc/lib64/libc.so.6
```
**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error
**Debug**
This is because tablet does not exist, so that olap scanner prepare failed.
But we didn't check the return status of prepare(), so the following method
may visit some uninitialized fields in olap scanner.
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