kaijchen opened a new pull request, #34485:
URL: https://github.com/apache/doris/pull/34485
## Proposed changes
Check `nullptr` in `TabletStream::close`. And fix `_num_threads` in
`LoadStreamMgr`.
```
#0 pthread_sigmask (how=2, newmask=<optimized out>, oldmask=0x0) at
pthread_sigmask.c:48
#1 0x00007fe448ccd71e in PosixSignals::chained_handler(int, siginfo*,
void*) [clone .part.0] () from
/usr/lib/jvm/java-17-openjdk-amd64/lib/server/libjvm.so
#2 0x00007fe448cce206 in JVM_handle_linux_signal () from
/usr/lib/jvm/java-17-openjdk-amd64/lib/server/libjvm.so
#3 <signal handler called>
#4 doris::ThreadPoolToken::wait (this=0x0) at
/mnt/disk1/chenkaijie/doris/be/src/util/threadpool.cpp:161
#5 0x00005606566d9f68 in doris::TabletStream::close()::$_0::operator()()
const (this=0x7fdc7cc72a00) at
/mnt/disk1/chenkaijie/doris/be/src/runtime/load_stream.cpp:229
#6 std::__invoke_impl<void,
doris::TabletStream::close()::$_0&>(std::__invoke_other,
doris::TabletStream::close()::$_0&) (__f=...)
at
/mnt/disk1/chenkaijie/env/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/invoke.h:61
#7 std::__invoke_r<void,
doris::TabletStream::close()::$_0&>(doris::TabletStream::close()::$_0&)
(__fn=...)
at
/mnt/disk1/chenkaijie/env/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/invoke.h:111
#8 std::_Function_handler<void (),
doris::TabletStream::close()::$_0>::_M_invoke(std::_Any_data const&)
(__functor=...)
at
/mnt/disk1/chenkaijie/env/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/std_function.h:290
#9 0x00005606566c866e in std::function<void ()>::operator()() const
(this=0x7fe036130a38)
at
/mnt/disk1/chenkaijie/env/ldb_toolchain/bin/../lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/std_function.h:591
#10 doris::WorkThreadPool<false>::work_thread (this=0x7fe4292d0010,
thread_id=<optimized out>) at
/mnt/disk1/chenkaijie/doris/be/src/util/work_thread_pool.hpp:158
#11 0x0000560662ae29cf in execute_native_thread_routine ()
#12 0x00007fe44d74c609 in start_thread (arg=<optimized out>) at
pthread_create.c:477
#13 0x00007fe44d9f9133 in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
```
## Further comments
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