Problem found during RQG testing of mariabackup.

bb-10.4-monty, origin/bb-10.4-monty ea07b5227feeccba1429b687e731033e1a6d560b 2019-02-05T20:08:11+02:00

One connection runs "chaotic" DDL.

Another connection runs mariabackup.

...

# 2019-02-12T11:51:55 [9201] Executing backup: bld_debug/extra/mariabackup/mariabackup --host=127.0.0.1 --user=root --password=''  --innodb-use-native-aio=0  --port=19620 --backup --datadir=/dev/shm/vardir/1549968621/17/1/data --target-dir=/dev/shm/vardir/1549968621/17/1_clone/data

[00] 2019-02-12 11:51:55 Connecting to MySQL server host: 127.0.0.1, user: root, password: set, port: 19620, socket: not set

[00] 2019-02-12 11:51:55 Using server version 10.4.3-MariaDB-debug-log

[00] 2019-02-12 11:51:55 bld_debug/extra/mariabackup/mariabackup based on MariaDB server 10.4.3-MariaDB Linux (x86_64)

...

[00] 2019-02-12 11:51:55 mariabackup: Generating a list of tablespaces

2019-02-12 11:51:55 0 [Warning] InnoDB: Allocated tablespace ID 4 for mysql/gtid_slave_pos, old maximum was 0

2019-02-12 11:51:55 0 [ERROR] InnoDB: Operating system error number 2 in a file operation.

2019-02-12 11:51:55 0 [ERROR] InnoDB: The error means the system cannot find the path specified.

2019-02-12 11:51:55 0 [ERROR] InnoDB: If you are installing InnoDB, remember that you must create directories yourself, InnoDB does not create them.

2019-02-12 11:51:55 0 [ERROR] InnoDB: File ./test/FTS_00000000000003a6_BEING_DELETED_CACHE.ibd: 'open' returned OS error 71.

2019-02-12 11:51:55 0x7f93afb92740  InnoDB: Assertion failure in file storage/innobase/fil/fil0fil.cc line 655

InnoDB: Failing assertion: success

InnoDB: We intentionally generate a memory trap.

190212 11:51:55 [ERROR] mysqld got signal 6 ;

...

stack_bottom = 0x0 thread_stack 0x49000

bld_debug/extra/mariabackup/mariabackup(my_print_stacktrace+0x40)[0x55d1dc82f4f9]

bld_debug/extra/mariabackup/mariabackup(handle_fatal_signal+0x3e7)[0x55d1dc0ffdce]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x13150)[0x7f93af78f150]

/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7f93ae0130bb]

/lib/x86_64-linux-gnu/libc.so.6(abort+0x16d)[0x7f93ae014f5d]

bld_debug/extra/mariabackup/mariabackup(+0x10308b9)[0x55d1dc5a08b9]

bld_debug/extra/mariabackup/mariabackup(+0xda68d1)[0x55d1dc3168d1]

bld_debug/extra/mariabackup/mariabackup(+0xda9b4b)[0x55d1dc319b4b]

bld_debug/extra/mariabackup/mariabackup(+0x65cac8)[0x55d1dbbccac8]

bld_debug/extra/mariabackup/mariabackup(+0x65ced6)[0x55d1dbbcced6]

bld_debug/extra/mariabackup/mariabackup(+0x65d472)[0x55d1dbbcd472]

bld_debug/extra/mariabackup/mariabackup(+0x65f258)[0x55d1dbbcf258]

bld_debug/extra/mariabackup/mariabackup(+0x6667ae)[0x55d1dbbd67ae]

bld_debug/extra/mariabackup/mariabackup(main+0x24d)[0x55d1dbbd5ffe]

/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0x7f93adffd1c1]

bld_debug/extra/mariabackup/mariabackup(_start+0x2a)[0x55d1dbbc5aea]