origin/bb-10.6-thiru c3983ee54025d70ffc23daab6af077b592800a22 2022-02-01T12:28:00+05:30  (The tree contains the fix for MDEV-26326).

But the bad effect should not be caused by the fix for MDEV-26326.

Workflow:

1. Start server + generate some initial data.

2. Several sessions run a DDL/DML mix.

3. During 2. is ongoing

    mariabackup --backup  to some location A

     mariabackup --prepare on location A

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 822]2022-02-01  2:57:01 0 [Note] InnoDB: !!!!!!!! UNIV_DEBUG switched on !!!!!!!!!

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 826]2022-02-01  2:57:01 0 [Note] InnoDB: Compressed tables use zlib 1.2.11

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 851]2022-02-01  2:57:01 0 [Note] InnoDB: Number of pools: 1

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 855]2022-02-01  2:57:01 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 881]2022-02-01  2:57:01 0 [Note] InnoDB: Initializing buffer pool, total size = 104857600, chunk size = 104857600

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 893]2022-02-01  2:57:01 0 [Note] InnoDB: Completed initialization of buffer pool

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 940]2022-02-01  2:57:01 0 [Note] InnoDB: Setting O_DIRECT on file ./ibdata1 failed

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 961]2022-02-01  2:57:01 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=11687970,12259007

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 1003]2022-02-01  2:57:01 0 [ERROR] InnoDB: Missing FILE_CREATE, FILE_DELETE or FILE_MODIFY before FILE_CHECKPOINT for tablespace 1501

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 1007]2022-02-01  2:57:01 0 [ERROR] InnoDB: Plugin initialization aborted at srv0start.cc[1445] with error Data structure corruption

# 2022-02-01T02:58:42 [1307818] | [rr 1397379 1011][00] FATAL ERROR: 2022-02-01 02:57:01 mariabackup: innodb_init() returned 37 (Data structure corruption).

RQG

===

# git clone https://github.com/mleich1/rqg --branch experimental RQG

#

# GIT_SHOW: HEAD -> experimental, origin/experimental 067340e8ec78c25880ccd2e67dd62ad134edc531 2022-01-31T17:10:39+01:00

# rqg.pl  : Version 4.0.4 (2021-12)

#

# $RQG_HOME/rqg.pl \

# --grammar=conf/runtime/alter_online.yy \

# --gendata=conf/runtime/alter_online.zz \

# --mysqld=--loose-innodb_lock_schedule_algorithm=fcfs \

# --mysqld=--loose-idle_write_transaction_timeout=0 \

# --mysqld=--loose-idle_transaction_timeout=0 \

# --mysqld=--loose-idle_readonly_transaction_timeout=0 \

# --mysqld=--connect_timeout=60 \

# --mysqld=--interactive_timeout=28800 \

# --mysqld=--slave_net_timeout=60 \

# --mysqld=--net_read_timeout=30 \

# --mysqld=--net_write_timeout=60 \

# --mysqld=--loose-table_lock_wait_timeout=50 \

# --mysqld=--wait_timeout=28800 \

# --mysqld=--lock-wait-timeout=86400 \

# --mysqld=--innodb-lock-wait-timeout=50 \

# --no-mask \

# --queries=10000000 \

# --seed=random \

# --reporters=Backtrace \

# --reporters=ErrorLog \

# --reporters=Deadlock1 \

# --validators=None \

# --mysqld=--log_output=none \

# --mysqld=--log_bin_trust_function_creators=1 \

# --mysqld=--loose-debug_assert_on_not_freed_memory=0 \

# --engine=InnoDB \

# --restart_timeout=360 \

# --mysqld=--plugin-load-add=file_key_management.so \

# --mysqld=--loose-file-key-management-filename=$RQG_HOME/conf/mariadb/encryption_keys.txt \

# --mysqld=--plugin-load-add=provider_lzo.so \

# --mysqld=--plugin-load-add=provider_bzip2.so \

# --mysqld=--plugin-load-add=provider_lzma \

# --mysqld=--plugin-load-add=provider_snappy \

# --mysqld=--plugin-load-add=provider_lz4 \

# --duration=300 \

# --mysqld=--loose-innodb_fatal_semaphore_wait_threshold=300 \

# --mysqld=--loose-innodb_read_only_compressed=OFF \

# --reporters=Mariabackup_linux \

# --mysqld=--innodb_log_file_size=402653184 \

# --duration=300 \

# --mysqld=--loose-innodb-sync-debug \

# --mysqld=--innodb_stats_persistent=off \

# --mysqld=--innodb_adaptive_hash_index=off \

# --mysqld=--log-bin \

# --mysqld=--sync-binlog=1 \

# --mysqld=--loose-innodb_evict_tables_on_commit_debug=off \

# --mysqld=--loose-max-statement-time=30 \

# --threads=2 \

# --mysqld=--innodb-use-native-aio=0 \

# --mysqld=--loose-gdb \

# --mysqld=--loose-debug-gdb \

# --rr=Extended \

# --rr_options=--wait \

# --mysqld=--innodb_rollback_on_timeout=OFF \

# --vardir_type=fast \

# --mysqld=--innodb_page_size=16K \

# --mysqld=--innodb-buffer-pool-size=8M \

# --no_mask \

# <local settings>

sdp:/data/results/1643708142/TBR-1345/dev/shm/rqg/1643708142/101/1_clone/rr

_RR_TRACE_DIR="." rr replay --mark-stdio mariabackup-0 # mariabackup --backup

_RR_TRACE_DIR="." rr replay --mark-stdio mariabackup-1 # mariabackup --prepare