One day mysql server died suddenly, there is not anything from syslog.
Then I found the log of mysql, the following is the log error content:
InnoDB] Assertion failure: buf0buf.h:1203:m_space != nullptr thread 140506604328704InnoDB: We intentionally generate a memory trap.InnoDB: Submit a detailed bug report to http://bugs.mysql.com.InnoDB: If you get repeated assertion failures or crashes, evenInnoDB: immediately after the mysqld startup, there may beInnoDB: corruption in the InnoDB tablespace. Please refer toInnoDB: http://dev.mysql.com/doc/refman/8.0/en/forcing-innodb-recovery.htmlInnoDB: about forcing recovery.01:42:13 UTC - mysqld got signal 6 ;Most likely, you have hit a bug, but this error can also be caused by malfunctioning hardware.Thread pointer: 0x7fc9dc6282a0Attempting backtrace. You can use the following information to find outwhere mysqld died. If you see no messages after this, something wentterribly wrong...stack_bottom = 7fca3e3d4c70 thread_stack 0x100000/usr/sbin/mysqld(my_print_stacktrace(unsigned char const*, unsigned long)+0x3d) [0x1fc33ad]/usr/sbin/mysqld(handle_fatal_signal+0x30b) [0xee902b]/lib64/libpthread.so.0(+0xf630) [0x7fcb50228630]/lib64/libc.so.6(gsignal+0x37) [0x7fcb4e772387]/lib64/libc.so.6(abort+0x148) [0x7fcb4e773a78]/usr/sbin/mysqld() [0xc3378c]/usr/sbin/mysqld(Buf_fetch_normal::get(buf_block_t*&)+0x1b8) [0x22ab088]/usr/sbin/mysqld(Buf_fetch<Buf_fetch_normal>::single_page()+0x53) [0x22ab123]/usr/sbin/mysqld(buf_page_get_gen(page_id_t const&, page_size_t const&, unsigned long, buf_block_t*, Page_fetch, char const*, unsigned long, mtr_t*, bool)+0x1ce) [0x22adade]/usr/sbin/mysqld(btr_cur_search_to_nth_level(dict_index_t*, unsigned long, dtuple_t const*, page_cur_mode_t, unsigned long, btr_cur_t*, unsigned long, char const*, unsigned long, mtr_t*)+0x61d) [0x228f0fd]/usr/sbin/mysqld(Row_sel_get_clust_rec_for_mysql::operator()(row_prebuilt_t*, dict_index_t*, unsigned char const*, que_thr_t*, unsigned char const**, unsigned long**, mem_block_info_t**, dtuple_t const**, mtr_t*, lob::undo_vers_t*)+0x115) [0x21d8225]/usr/sbin/mysqld(row_search_mvcc(unsigned char*, page_cur_mode_t, row_prebuilt_t*, unsigned long, unsigned long)+0x208b) [0x21dcd2b]/usr/sbin/mysqld(ha_innobase::general_fetch(unsigned char*, unsigned int, unsigned int)+0x2a9) [0x20bb0b9]/usr/sbin/mysqld(handler::ha_index_next_same(unsigned char*, unsigned char const*, unsigned int)+0x2f9) [0xff5b49]/usr/sbin/mysqld(RefIterator<false>::Read()+0x11b) [0xd5d51b]/usr/sbin/mysqld(FilterIterator::Read()+0x14) [0x1290aa4]/usr/sbin/mysqld(Query_expression::ExecuteIteratorQuery(THD*)+0x29e) [0xe6bbbe]/usr/sbin/mysqld(Query_expression::execute(THD*)+0x2f) [0xe6bf1f]/usr/sbin/mysqld(Sql_cmd_dml::execute(THD*)+0x186) [0xdf44f6]/usr/sbin/mysqld(mysql_execute_command(THD*, bool)+0x9c8) [0xd9c618]/usr/sbin/mysqld(dispatch_sql_command(THD*, Parser_state*)+0x412) [0xd9fdc2]/usr/sbin/mysqld(dispatch_command(THD*, COM_DATA const*, enum_server_command)+0xe0e) [0xda10ee]/usr/sbin/mysqld(do_command(THD*)+0x194) [0xda3194]/usr/sbin/mysqld() [0xed9c70]/usr/sbin/mysqld() [0x248d620]/lib64/libpthread.so.0(+0x7ea5) [0x7fcb50220ea5]/lib64/libc.so.6(clone+0x6d) [0x7fcb4e83ab0d]On first time, I restarted mysql server, but several days later, the phenomenon occured again.
I could not get any result.