unit.conc_connection fails on test_conc21

unit.conc_connection                     w3 [ fail ]

        Test ended at 2023-03-19 22:32:31

...

# Due to mysql_change_user security fix this test will not work anymore.

ok 35 # skip test_change_user

true: 1

ok 36 - test_opt_reconnect

ok 37 - test_compress

# Thread_id before kill: 46

# Thread_id after kill: 47

ok 38 - test_reconnect

# Error: String server version mismatch (./libmariadb/unittest/libmariadb/connection.c: 634)

not ok 39 - test_conc21

# error: Can't connect to local server through socket '/run/mysqld/mysqld.sock' (2)

# error: Can't connect to local server through socket '/run/mysqld/mysqld.sock' (2)

ok 40 - test_conc26

# error: Can't connect to server on '192.168.1.101' (110)

# elapsed: 5

ok 41 - test_connection_timeout

# error: Can't connect to local server through socket '/run/mysqld/mysqld.sock' (2)

# elapsed: 0

ok 42 - test_connection_timeout2

# error: Lost connection to server during query

# elapsed: 5

# elapsed: 10

ok 43 - test_connection_timeout3

# close default

# Failed 1 tests!