Importing partial backup from XtraBackup can sometimes crash server

xtrabackup --backup --parallel=4 --databases=my_schema --target-dir=${TARGET_DIR}

xtrabackup --prepare --export --target-dir=${TARGET_DIR}

TABLES=$(mysql -u root --batch --skip-column-names --execute="SELECT GROUP_CONCAT(TABLE_NAME SEPARATOR ' ') FROM information_schema.TABLES WHERE TABLE_SCHEMA='my_schema' GROUP BY TABLE_SCHEMA")

for TABLE in ${TABLES}; do

mysql -u root -B my_schema -e "SET foreign_key_checks = 0; ALTER TABLE \`${TABLE}\` DISCARD TABLESPACE; SET foreign_key_checks = 1"

done;

cp -vn ${TARGET_DIR}/my_schema/*.exp /var/lib/mysql/my_schema/

cp -vn ${TARGET_DIR}/my_schema/*.frm /var/lib/mysql/my_schema/

cp -vn ${TARGET_DIR}/my_schema/*.ibd /var/lib/mysql/my_schema/

chown mysql:mysql /var/lib/mysql/my_schema/*

for TABLE in ${TABLES}; do

mysql -u root -B my_schema -e "ALTER TABLE \`${TABLE}\` IMPORT TABLESPACE"

done;

2017-11-09 16:03:39 140282653591296 [Note] InnoDB: Phase I - Update all pages

2017-11-09 16:03:39 140282653591296 [Note] InnoDB: Sync to disk

2017-11-09 16:03:39 140282653591296 [Note] InnoDB: Sync to disk - done!

2017-11-09 16:03:39 140282653591296 [Note] InnoDB: Phase III - Flush changes to disk

2017-11-09 16:03:39 140282653591296 [Note] InnoDB: Phase IV - Flush complete

2017-11-09 16:03:39 140282653591296 [ERROR] [FATAL] InnoDB: Trying to read page number 1664705849 in space 34, space name my_schema/my_tab, which is outside the tablespace bounds. Byte offset 0, len 16384

171109 16:03:39 [ERROR] mysqld got signal 6 ;

This could be because you hit a bug. It is also possible that this binary

or one of the libraries it was linked against is corrupt, improperly built,

or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help

diagnose the problem, but since we have already crashed,

something is definitely wrong and this may fail.

Server version: 10.2.9-MariaDB-debug-log

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=1

max_threads=153

thread_count=10

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467321 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7f961002a530

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 = 0x7f9619bc3d80 thread_stack 0x49000

/usr/sbin/mysqld(my_print_stacktrace+0x38)[0x7f963238a797]

/usr/sbin/mysqld(handle_fatal_signal+0x39e)[0x7f9631c213c4]

/lib64/libpthread.so.0(+0xf370)[0x7f9630fc9370]

/lib64/libc.so.6(gsignal+0x37)[0x7f962f1371d7]

/lib64/libc.so.6(abort+0x148)[0x7f962f1388c8]

/usr/sbin/mysqld(+0xd5b6d5)[0x7f96321536d5]

mysys/stacktrace.c:267(my_print_stacktrace)[0x7f9632242acd]

fil/fil0fil.cc:5134(fil_report_invalid_page_access(unsigned long, unsigned long, char const*, unsigned long, unsigned long, bool))[0x7f9632243155]

buf/buf0rea.cc:183(buf_read_page_low(dberr_t*, bool, unsigned long, unsigned long, page_id_t const&, page_size_t const&, bool, bool))[0x7f96321dd4b8]

buf/buf0rea.cc:436(buf_read_page(page_id_t const&, page_size_t const&))[0x7f96321ddea7]

buf/buf0buf.cc:4314(buf_page_get_gen(page_id_t const&, page_size_t const&, unsigned long, buf_block_t*, unsigned long, char const*, unsigned int, mtr_t*, dberr_t*))[0x7f96321b2a1a]

dict/dict0stats.cc:1549(dict_stats_analyze_index_below_cur(btr_cur_t const*, unsigned long, unsigned long*, unsigned long*))[0x7f9632223152]

dict/dict0stats.cc:1841(dict_stats_analyze_index_for_n_prefix(dict_index_t*, unsigned long, std::vector<unsigned long, ut_allocator<unsigned long, true> > const*, n_diff_data_t*, mtr_t*))[0x7f9632223954]

dict/dict0stats.cc:2067(dict_stats_analyze_index(dict_index_t*))[0x7f963222460f]

dict/dict0stats.cc:2269(dict_stats_update_persistent(dict_table_t*))[0x7f96322248a8]

dict/dict0stats.cc:3228(dict_stats_update(dict_table_t*, dict_stats_upd_option_t))[0x7f9632226ecb]

handler/ha_innodb.cc:13622(ha_innobase::discard_or_import_tablespace(char))[0x7f9631f4ad4f]

sql/handler.cc:4198(handler::ha_discard_or_import_tablespace(char))[0x7f9631c2c480]

sql/sql_table.cc:5714(mysql_discard_or_import_tablespace(THD*, TABLE_LIST*, bool))[0x7f9631a74147]

sql/sql_alter.cc:364(Sql_cmd_discard_import_tablespace::execute(THD*))[0x7f9631af820e]

sql/sql_parse.cc:6203(mysql_execute_command(THD*))[0x7f96319b21e9]

sql/sql_parse.cc:7875(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x7f96319b6bd4]

sql/sql_parse.cc:7691(wsrep_mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x7f96319b6271]

sql/sql_parse.cc:1809(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x7f96319a4505]

sql/sql_parse.cc:1360(do_command(THD*))[0x7f96319a2e13]

sql/sql_connect.cc:1354(do_handle_one_connection(CONNECT*))[0x7f9631af2d0d]

sql/sql_connect.cc:1261(handle_one_connection)[0x7f9631af2a6d]

/lib64/libpthread.so.0(+0x7dc5)[0x7f9630fc1dc5]

/lib64/libc.so.6(clone+0x6d)[0x7f962f1f973d]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x7f961003a888): ALTER TABLE `my_tab` IMPORT TABLESPACE

Connection ID (thread ID): 73

Status: NOT_KILLED