在我们使用将数据库更新到 8.0.19 之后apt-get upgrade，服务器在启动时崩溃：
2020-04-11T23:11:56.970273Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: '/var/run/mysqld/mysqlx.sock' bind-address: '::' port: 33060
23:12:14 UTC - mysqld got signal 11 ;
Most likely, you have hit a bug, but this error can also be caused by malfunctioning hardware.
Thread pointer: 0x7f76181d67a0
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
stack_bottom = 7f7dfe006d50 thread_stack 0x46000
/usr/sbin/mysqld(my_print_stacktrace(unsigned char const*, unsigned long)+0x3d) [0x562e62ba278d]
/usr/sbin/mysqld(handle_fatal_signal+0x303) [0x562e61c3c553]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12890) [0x7f838a2f4890]
/usr/sbin/mysqld(actual_key_parts(KEY const*)+0x13) [0x562e61b5f533]
/usr/sbin/mysqld(calculate_key_len(TABLE*, unsigned int, unsigned long)+0x28) [0x562e61d56ed8]
/usr/sbin/mysqld(handler::ha_index_read_map(unsigned char*, unsigned char const*, unsigned long, ha_rkey_function)+0x295) [0x562e61d57765]
/usr/sbin/mysqld(check_unique_constraint(TABLE*)+0xb0) [0x562e61ac4890]
/usr/sbin/mysqld(do_sj_dups_weedout(THD*, SJ_TMP_TABLE*)+0x129) [0x562e61ac4b19]
/usr/sbin/mysqld(WeedoutIterator::Read()+0xa9) [0x562e61cfdc79]
/usr/sbin/mysqld(NestedLoopIterator::Read()+0xee) [0x562e61cfe28e]
/usr/sbin/mysqld(MaterializeIterator::MaterializeQueryBlock(MaterializeIterator::QueryBlock const&, unsigned long long*)+0x116) [0x562e61d03336]
/usr/sbin/mysqld(MaterializeIterator::Init()+0x287) [0x562e61d03c27]
/usr/sbin/mysqld(MaterializeIterator::MaterializeQueryBlock(MaterializeIterator::QueryBlock const&, unsigned long long*)+0x80) [0x562e61d032a0]
/usr/sbin/mysqld(MaterializeIterator::Init()+0x287) [0x562e61d03c27]
/usr/sbin/mysqld(AggregateIterator::Init()+0x16) [0x562e61cfdf36]
/usr/sbin/mysqld(SELECT_LEX_UNIT::ExecuteIteratorQuery(THD*)+0x230) [0x562e61bc47b0]
/usr/sbin/mysqld(SELECT_LEX_UNIT::execute(THD*)+0x139) [0x562e61bc6b49]
/usr/sbin/mysqld(Sql_cmd_dml::execute_inner(THD*)+0x21b) [0x562e61b57d1b]
/usr/sbin/mysqld(Sql_cmd_dml::execute(THD*)+0x458) [0x562e61b61438]
/usr/sbin/mysqld(mysql_execute_command(THD*, bool)+0x2811) [0x562e61b11741]
/usr/sbin/mysqld(mysql_parse(THD*, Parser_state*)+0x361) [0x562e61b138f1]
/usr/sbin/mysqld(dispatch_command(THD*, COM_DATA const*, enum_server_command)+0x127f) [0x562e61b150af]
/usr/sbin/mysqld(do_command(THD*)+0x1c4) [0x562e61b16964]
/usr/sbin/mysqld(+0xfbd800) [0x562e61c2d800]
/usr/sbin/mysqld(+0x244b909) [0x562e630bb909]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76db) [0x7f838a2e96db]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x3f) [0x7f838851088f]
接下来是有问题的查询：
Query (7f76181e36e8): SELECT COUNT(*) [REDACTED]
Connection ID (thread ID): 5233
Status: NOT_KILLED
感谢您的帮助 ！