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.

...

Executing backup: bld_debug/extra/mariabackup/mariabackup --host=127.0.0.1 --user=root --password=''  --innodb-use-native-aio=0  --port=19720 --backup --datadir=/dev/shm/vardir/1549967567/22/1/data --target-dir=/dev/shm/vardir/1549967567/22/1_clone/data

2019-02-12 11:33:27 Connecting to MySQL server host: 127.0.0.1, user: root, password: set, port: 19720, socket: not set

[00] 2019-02-12 11:33:27 Using server version 10.4.3-MariaDB-debug-log

...

2019-02-12 11:33:31 0x7feefeb29740  InnoDB: Assertion failure in file extra/mariabackup/xtrabackup.cc line 647

InnoDB: Failing assertion: opt_no_lock

InnoDB: We intentionally generate a memory trap.

InnoDB: Submit a detailed bug report to https://jira.mariadb.org/

InnoDB: If you get repeated assertion failures or crashes, even

InnoDB: immediately after the mysqld startup, there may be

InnoDB: corruption in the InnoDB tablespace. Please refer to

InnoDB: https://mariadb.com/kb/en/library/innodb-recovery-modes/

InnoDB: about forcing recovery.

190212 11:33:31 [ERROR] mysqld got signal 6 ;

...

stack_bottom = 0x0 thread_stack 0x49000

bld_debug/extra/mariabackup/mariabackup(my_print_stacktrace+0x40)[0x55beb64884f9]

bld_debug/extra/mariabackup/mariabackup(handle_fatal_signal+0x3e7)[0x55beb5d58dce]

/lib/x86_64-linux-gnu/libpthread.so.0(+0x13150)[0x7feefe726150]

/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7feefcfaa0bb]

/lib/x86_64-linux-gnu/libc.so.6(abort+0x16d)[0x7feefcfabf5d]

bld_debug/extra/mariabackup/mariabackup(+0x10308b9)[0x55beb61f98b9]

bld_debug/extra/mariabackup/mariabackup(+0x6581a7)[0x55beb58211a7]

bld_debug/extra/mariabackup/mariabackup(+0xec09e6)[0x55beb60899e6]

bld_debug/extra/mariabackup/mariabackup(+0xec2ef4)[0x55beb608bef4]

bld_debug/extra/mariabackup/mariabackup(+0xec6bce)[0x55beb608fbce]

bld_debug/extra/mariabackup/mariabackup(+0xec7635)[0x55beb6090635]

bld_debug/extra/mariabackup/mariabackup(+0x65b9fb)[0x55beb58249fb]

bld_debug/extra/mariabackup/mariabackup(+0x65bcb1)[0x55beb5824cb1]

ut/ut0mem.cc:42(ut_strlcpy(char*, char const*, unsigned long))[0x55beb582771e]

mariabackup/xtrabackup.cc:649(backup_file_op_fail(unsigned long, unsigned char const*, unsigned char const*, unsigned long, unsigned char const*, unsigned long))[0x55beb5828612]

log/log0recv.cc:493(fil_name_parse(unsigned char*, unsigned char const*, unsigned long, unsigned long, mlog_id_t, bool))[0x55beb582f7ae]

log/log0recv.cc:1187(recv_parse_or_apply_log_rec_body(mlog_id_t, unsigned char*, unsigned char*, unsigned long, unsigned long, bool, buf_block_t*, mtr_t*))[0x55beb582effe]

/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0x7feefcf941c1]

bld_debug/extra/mariabackup/mariabackup(_start+0x2a)[0x55beb581eaea]

RQG YY grammar:

query:

    ALTER TABLE t2 ADD PRIMARY KEY IF NOT EXISTS ( col2 , col_text(9) ) |

    ALTER TABLE t2 ADD PRIMARY KEY IF NOT EXISTS ( col_text(9) , col2 ) |

    ALTER TABLE t2 DROP PRIMARY KEY |

    ALTER TABLE t2 DROP PRIMARY KEY |

    ALTER TABLE t2 DROP PRIMARY KEY |

    ALTER TABLE t2 DROP PRIMARY KEY ;

query_init:

    CREATE TABLE IF NOT EXISTS t2 ( col1 INT, col2 INT, col_int INTEGER , col_string VARCHAR(19), col_varchar VARCHAR(500), col_text TEXT ) ENGINE = InnoDB ROW_FORMAT = Compressed ; thread_connect ;

thread_connect:

    SET AUTOCOMMIT = 0; SET SESSION lock_wait_timeout = 2 ; SET SESSION innodb_lock_wait_timeout = 1 ;