Segfault on pgbench with two clients

[rekby]

1. Start local YDB https://github.com/ydb-platform/ydb/wiki/Local-run-postgres-tests
2. Install pgbench: apt install -y postgresql-contrib
3. Run command: pgbench -n -T 10 -b select-only --protocol=simple --client=2

Stacktrace

Core was generated by `/home/rekby/ydbwork/ydb/ydb/apps/ydbd/ydbd server --node=1 --log-file-name=/hom'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  std::__y1::basic_string<char, std::__y1::char_traits<char>, std::__y1::allocator<char>>::__is_long[abi:v180000]() const (this=0x8fc8a0215cf7fb33) at /-S/contrib/libs/cxxsupp/libcxx/include/string:1769

warning: 1769	/-S/contrib/libs/cxxsupp/libcxx/include/string: No such file or directory
[Current thread is 1 (LWP 71771)]
[arc] Arcadia GDB pretty-printers enabled
(gdb) bt
#0  std::__y1::basic_string<char, std::__y1::char_traits<char>, std::__y1::allocator<char>>::__is_long[abi:v180000]() const (this=0x8fc8a0215cf7fb33) at /home/rekby/ydbwork/ydb/contrib/libs/cxxsupp/libcxx/include/string:1769
#1  std::__y1::basic_string<char, std::__y1::char_traits<char>, std::__y1::allocator<char>>::__get_pointer[abi:v180000]() const (this=0x8fc8a0215cf7fb33) at /home/rekby/ydbwork/ydb/contrib/libs/cxxsupp/libcxx/include/string:1904
#2  std::__y1::basic_string<char, std::__y1::char_traits<char>, std::__y1::allocator<char>>::data[abi:v180000]() const (this=0x8fc8a0215cf7fb33) at /home/rekby/ydbwork/ydb/contrib/libs/cxxsupp/libcxx/include/string:1594
#3  TBasicString<char, std::__y1::char_traits<char>>::data() const (this=0x17f3e36d7b88) at /home/rekby/ydbwork/ydb/util/generic/string.h:304
#4  TStringBase<TBasicString<char, std::__y1::char_traits<char>>, char, std::__y1::char_traits<char>>::Ptr() const (this=0x17f3e36d7b88) at /home/rekby/ydbwork/ydb/util/generic/strbase.h:536
#5  TStringBase<TBasicString<char, std::__y1::char_traits<char>>, char, std::__y1::char_traits<char>>::data() const (this=0x17f3e36d7b88) at /home/rekby/ydbwork/ydb/util/generic/strbase.h:128
#6  TStringBase<TBasicString<char, std::__y1::char_traits<char>>, char, std::__y1::char_traits<char>>::operator std::__y1::basic_string_view<char, std::__y1::char_traits<char>><std::__y1::char_traits<char>>() const (this=0x17f3e36d7b88) at /home/rekby/ydbwork/ydb/util/generic/strbase.h:65
#7  std::__y1::basic_string_view<char, std::__y1::char_traits<char>> google::protobuf::internal::TransparentSupport<TBasicString<char, std::__y1::char_traits<char>>>::ImplicitConvert<void>(TBasicString<char, std::__y1::char_traits<char>> const&) (str=<error reading variable: Cannot access memory at address 0x8fc8a0215cf7fb33>)
    at /home/rekby/ydbwork/ydb/contrib/libs/protobuf/src/google/protobuf/map.h:226
#8  unsigned long google::protobuf::internal::TransparentSupport<TBasicString<char, std::__y1::char_traits<char>>>::hash::operator()<TBasicString<char, std::__y1::char_traits<char>>>(TBasicString<char, std::__y1::char_traits<char>> const&) const (str=<error reading variable: Cannot access memory at address 0x8fc8a0215cf7fb33>, this=<optimized out>)
    at /home/rekby/ydbwork/ydb/contrib/libs/protobuf/src/google/protobuf/map.h:234
#9  unsigned long google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::InnerMap::BucketNumber<TBasicString<char, std::__y1::char_traits<char>>>(TBasicString<char, std::__y1::char_traits<char>> const&) const (k=<error reading variable: Cannot access memory at address 0x8fc8a0215cf7fb33>, this=<optimized out>)
    at /home/rekby/ydbwork/ydb/contrib/libs/protobuf/src/google/protobuf/map.h:1031
#10 std::__y1::pair<google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::InnerMap::iterator_base<google::protobuf::MapPair<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue> const>, unsigned long> google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::InnerMap::FindHelper<TBasicString<char, std::__y1::char_traits<char>>>(TBasicString<char, std::__y1::char_traits<char>> const&, std::__y1::__map_iterator<std::__y1::__tree_iterator<std::__y1::__value_type<std::__y1::reference_wrapper<TBasicString<char, std::__y1::char_traits<char>> const>, void*>, std::__y1::__tree_node<std::__y1::__value_type<std::__y1::reference_wrapper<TBasicString<char, std::__y1::char_traits<char>> const>, void*>, void*>*, long>>*) const (this=0x17f3e2a034a0, k=<error reading variable: Cannot access memory at address 0x8fc8a0215cf7fb33>, it=0x0) at /home/rekby/ydbwork/ydb/contrib/libs/protobuf/src/google/protobuf/map.h:778
#11 0x0000000027677467 in std::__y1::pair<google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::InnerMap::iterator_base<google::protobuf::MapPair<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue> const>, unsigned long> google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::InnerMap::FindHelper<TBasicString<char, std::__y1::char_traits<char>>>(TBasicString<char, std::__y1::char_traits<char>> const&) const (this=0x17f3e2a034a0, k=<error reading variable: Cannot access memory at address 0x8fc8a0215cf7fb33>) at /home/rekby/ydbwork/ydb/contrib/libs/protobuf/src/google/protobuf/map.h:773
#12 google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::InnerMap::iterator_base<google::protobuf::MapPair<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue> const> google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::InnerMap::find<TBasicString<char, std::__y1::char_traits<char>>>(TBasicString<char, std::__y1::char_traits<char>> const&) const (this=0x17f3e2a034a0, k=<error reading variable: Cannot access memory at address 0x8fc8a0215cf7fb33>) at /home/rekby/ydbwork/ydb/contrib/libs/protobuf/src/google/protobuf/map.h:690
#13 google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::const_iterator google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::find<TBasicString<char, std::__y1::char_traits<char>>>(TBasicString<char, std::__y1::char_traits<char>> const&) const (this=0x17f3e2a034a0,
    key=<error reading variable: Cannot access memory at address 0x8fc8a0215cf7fb33>) at /home/rekby/ydbwork/ydb/contrib/libs/protobuf/src/google/protobuf/map.h:1247
#14 bool google::protobuf::Map<TBasicString<char, std::__y1::char_traits<char>>, Ydb::TypedValue>::contains<TBasicString<char, std::__y1::char_traits<char>>>(TBasicString<char, std::__y1::char_traits<char>> const&) const (this=0x17f3e2a034a0, key=<error reading variable: Cannot access memory at address 0x8fc8a0215cf7fb33>)
    at /home/rekby/ydbwork/ydb/contrib/libs/protobuf/src/google/protobuf/map.h:1256
#15 NKikimr::NKqp::(anonymous namespace)::TKqpSessionActor::PrepareQueryContext (this=0x17f3fb52c800) at /home/rekby/ydbwork/ydb/ydb/core/kqp/session_actor/kqp_session_actor.cpp:830
#16 NKikimr::NKqp::(anonymous namespace)::TKqpSessionActor::OnSuccessCompileRequest (this=this@entry=0x17f3fb52c800) at /home/rekby/ydbwork/ydb/ydb/core/kqp/session_actor/kqp_session_actor.cpp:586
#17 0x00000000276628e6 in NKikimr::NKqp::(anonymous namespace)::TKqpSessionActor::Handle (this=0x17f3fb52c800, ev=...) at /home/rekby/ydbwork/ydb/ydb/core/kqp/session_actor/kqp_session_actor.cpp:499
#18 NKikimr::NKqp::(anonymous namespace)::TKqpSessionActor::ExecuteState (this=0x17f3fb52c800, ev=TAutoPtr<NActors::IEventHandle> = {...}) at /home/rekby/ydbwork/ydb/ydb/core/kqp/session_actor/kqp_session_actor.cpp:2228
#19 0x000000001745dc80 in NActors::TGenericExecutorThread::Execute<NActors::TMailboxTable::THTSwapMailbox> (this=this@entry=0x17f3fe601700, mailbox=0x17f3fb541940, hint=hint@entry=4197, isTailExecution=<optimized out>) at /home/rekby/ydbwork/ydb/ydb/library/actors/core/executor_thread.cpp:251
#20 0x0000000017455475 in NActors::TGenericExecutorThread::ProcessExecutorPool(NActors::IExecutorPool*)::$_0::operator()(unsigned int, bool) const (this=this@entry=0x7fa46859af70, activation=activation@entry=4197, isTailExecution=false) at /home/rekby/ydbwork/ydb/ydb/library/actors/core/executor_thread.cpp:439
#21 0x0000000017454e38 in NActors::TGenericExecutorThread::ProcessExecutorPool (this=this@entry=0x17f3fe601700, pool=<optimized out>) at /home/rekby/ydbwork/ydb/ydb/library/actors/core/executor_thread.cpp:492
#22 0x0000000017455d4c in NActors::TExecutorThread::ThreadProc (this=0x17f3fe601700) at /home/rekby/ydbwork/ydb/ydb/library/actors/core/executor_thread.cpp:523
#23 0x000000001641076c in (anonymous namespace)::TPosixThread::ThreadProxy (arg=0x17f3fe9c9ba0) at /home/rekby/ydbwork/ydb/util/system/thread.cpp:244
#24 0x00007fa46e7e1ac3 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#25 0x00007fa46e873850 in ?? () from /lib/x86_64-linux-gnu/libc.so.6

It is regression. Some time ago pgbench worked with more then one client.

[rekby]

Similar to: #2507