morningman opened a new issue #4396:
URL: https://github.com/apache/incubator-doris/issues/4396
**Describe the bug**
```
#0 std::_Hash_bytes (ptr=<optimized out>, len=892612151,
seed=seed@entry=3339675911) at
../../../../gcc-7.3.0/libstdc++-v3/libsupc++/hash_bytes.cc:147
#1 0x0000000001277bc1 in hash (__seed=3339675911, __clength=<optimized
out>, __ptr=<optimized out>) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/functional_hash.h:192
#2 operator() (this=0x384f168
<doris::DorisMetrics::instance()::instance+3784>, __s=...) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/basic_string.h:6591
#3 _M_hash_code (this=0x384f168
<doris::DorisMetrics::instance()::instance+3784>, __k=...) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/hashtable_policy.h:1368
#4 _M_erase (__k=..., this=0x384f168
<doris::DorisMetrics::instance()::instance+3784>) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/hashtable.h:1903
#5 erase (__k=..., this=0x384f168
<doris::DorisMetrics::instance()::instance+3784>) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/hashtable.h:759
#6 erase (__x=..., this=0x384f168
<doris::DorisMetrics::instance()::instance+3784>) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/unordered_map.h:817
#7 doris::MetricRegistry::deregister_entity (this=this@entry=0x384f140
<doris::DorisMetrics::instance()::instance+3744>, name=...) at
/home/work/teamcity/workspace/doris_daily_compile/core/be/src/util/metrics.cpp:170
#8 0x0000000000f62000 in doris::BaseTablet::~BaseTablet (this=0x108a9690,
__in_chrg=<optimized out>) at
/home/work/teamcity/workspace/doris_daily_compile/core/be/src/olap/base_tablet.cpp:46
#9 0x0000000000d793da in
std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release (this=0x108a9680)
at /home/work/cov_tools/gcc730/include/c++/7.3.0/bits/shared_ptr_base.h:154
#10 0x0000000000f04693 in ~__shared_count (this=<optimized out>,
__in_chrg=<optimized out>) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/shared_ptr_base.h:684
#11 ~__shared_ptr (this=<optimized out>, __in_chrg=<optimized out>) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/shared_ptr_base.h:1123
#12 operator= (__r=..., this=0x14ad0000) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/shared_ptr_base.h:1213
#13 operator= (__r=..., this=0x14ad0000) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/shared_ptr.h:319
#14 __copy_m<std::shared_ptr<doris::Tablet>*,
std::shared_ptr<doris::Tablet>*> (__result=0x14ad0000, __last=<optimized out>,
__first=0x14ad0010) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/stl_algobase.h:343
#15 __copy_move_a<true, std::shared_ptr<doris::Tablet>*,
std::shared_ptr<doris::Tablet>*> (__result=<optimized out>, __last=<optimized
out>, __first=<optimized out>) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/stl_algobase.h:386
#16 __copy_move_a2<true,
__gnu_cxx::__normal_iterator<std::shared_ptr<doris::Tablet>*,
std::vector<std::shared_ptr<doris::Tablet> > >,
__gnu_cxx::__normal_iterator<std::shared_ptr<doris::Tablet>*,
std::vector<std::shared_ptr<doris::Tablet> > > > (__result=..., __last=...,
__first=...)
at /home/work/cov_tools/gcc730/include/c++/7.3.0/bits/stl_algobase.h:422
#17 move<__gnu_cxx::__normal_iterator<std::shared_ptr<doris::Tablet>*,
std::vector<std::shared_ptr<doris::Tablet> > >,
__gnu_cxx::__normal_iterator<std::shared_ptr<doris::Tablet>*,
std::vector<std::shared_ptr<doris::Tablet> > > > (__result=..., __last=...,
__first=...)
at /home/work/cov_tools/gcc730/include/c++/7.3.0/bits/stl_algobase.h:488
#18 _M_erase (__position=..., this=0x545a338) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/vector.tcc:157
#19 erase (__position=..., this=0x545a338) at
/home/work/cov_tools/gcc730/include/c++/7.3.0/bits/stl_vector.h:1180
#20 doris::TabletManager::start_trash_sweep (this=0x545a280) at
/home/work/teamcity/workspace/doris_daily_compile/core/be/src/olap/tablet_manager.cpp:1061
#21 0x0000000000ecf279 in doris::StorageEngine::_start_trash_sweep
(this=this@entry=0x545c780, usage=usage@entry=0x7f8b8b136068) at
/home/work/teamcity/workspace/doris_daily_compile/core/be/src/olap/storage_engine.cpp:656
#22 0x0000000000ebf21f in
doris::StorageEngine::_garbage_sweeper_thread_callback (this=0x545c780,
arg=<optimized out>) at
/home/work/teamcity/workspace/doris_daily_compile/core/be/src/olap/olap_server.cpp:256
#23 0x000000000291690f in std::execute_native_thread_routine (__p=0x5556840)
at ../../../../../gcc-7.3.0/libstdc++-v3/src/c++11/thread.cc:83
#24 0x00007f8bf90b11c3 in start_thread () from
/opt/compiler/gcc-4.8.2/lib64/libpthread.so.0
#25 0x00007f8bf8ae012d in clone () from
/opt/compiler/gcc-4.8.2/lib64/libc.so.6
```
This is because every time a tablet object is constructed, a MetricEntity
instance will be constructed and registered in the MetricRegistry, but
MetricRegistry only uses the tablet id as the key to save the MetricEntity.
When two identical tablet objects are constructed at the same time, an access
exception will be generated.
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