Backup fails when undo truncation log is present
Description
Environment
MySQL version:
[DEV]root@myt-nza7ldt2gfco5nj6 ~ # /usr/sbin/mysqld --version
/usr/sbin/mysqld Ver 8.0.25-15 for Linux on x86_64 (Percona Server (GPL), Revision 7df6366)
PXB version:
[DEV]root@myt-nza7ldt2gfco5nj6 ~ # /usr/bin/xtrabackup --version
xtrabackup: recognized server arguments: --datadir=/var/lib/mysql --tmpdir=/var/lib/mysql/.tmp --innodb_page_size=16384 --innodb_buffer_pool_size=256M --innodb_file_per_table=1 --innodb_log_buffer_size=16777216 --innodb_log_file_size=268435456 --innodb_adaptive_hash_index=1 --innodb_use_native_aio=1 --innodb_flush_method=O_DIRECT --innodb_flush_log_at_trx_commit=1 --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --server-id=4 --log_bin=mysql-bin-log-myt-nza7ldt2gfco5nj6-db-yandex-net --log-bin-index=/var/lib/mysql/mysql-bin-log.index
/usr/bin/xtrabackup.bak version 8.0.25-17 based on MySQL server 8.0.25 Linux (x86_64) (revision id: a460572)
MySQL config
[DEV]root@myt-nza7ldt2gfco5nj6 ~ # mysql --port 3308 -e "SHOW GLOBAL VARIABLES" | cat
Variable_name Value
activate_all_roles_on_login OFF
admin_address myt-nza7ldt2gfco5nj6.db.yandex.net
admin_port 3308
admin_ssl_ca
admin_ssl_capath
admin_ssl_cert
admin_ssl_cipher
admin_ssl_crl
admin_ssl_crlpath
admin_ssl_key
admin_tls_ciphersuites
admin_tls_version TLSv1,TLSv1.1,TLSv1.2,TLSv1.3
auto_generate_certs ON
auto_increment_increment 1
auto_increment_offset 1
autocommit ON
automatic_sp_privileges ON
avoid_temporal_upgrade OFF
back_log 100
basedir /usr/
big_tables OFF
bind_address *
binlog_cache_size 32768
binlog_checksum CRC32
binlog_direct_non_transactional_updates OFF
binlog_encryption OFF
binlog_error_action ABORT_SERVER
binlog_expire_logs_seconds 0
binlog_format ROW
binlog_group_commit_sync_delay 0
binlog_group_commit_sync_no_delay_count 0
binlog_gtid_simple_recovery ON
binlog_max_flush_queue_time 0
binlog_order_commits ON
binlog_rotate_encryption_master_key_at_startup OFF
binlog_row_event_max_size 8192
binlog_row_image FULL
binlog_row_metadata MINIMAL
binlog_row_value_options
binlog_rows_query_log_events OFF
binlog_skip_flush_commands OFF
binlog_space_limit 0
binlog_stmt_cache_size 32768
binlog_transaction_compression OFF
binlog_transaction_compression_level_zstd 3
binlog_transaction_dependency_history_size 25000
binlog_transaction_dependency_tracking COMMIT_ORDER
block_encryption_mode aes-128-ecb
bulk_insert_buffer_size 8388608
caching_sha2_password_auto_generate_rsa_keys ON
caching_sha2_password_digest_rounds 5000
caching_sha2_password_private_key_path private_key.pem
caching_sha2_password_public_key_path public_key.pem
character_set_client utf8mb4
character_set_connection utf8mb4
character_set_database utf8mb4
character_set_filesystem binary
character_set_results utf8mb4
character_set_server utf8mb4
character_set_system utf8mb3
character_sets_dir /usr/share/mysql/charsets/
check_proxy_users OFF
collation_connection utf8mb4_0900_ai_ci
collation_database utf8mb4_0900_ai_ci
collation_server utf8mb4_0900_ai_ci
completion_type NO_CHAIN
concurrent_insert AUTO
connect_timeout 10
core_file OFF
create_admin_listener_thread OFF
cte_max_recursion_depth 1000
datadir /var/lib/mysql/
default_authentication_plugin caching_sha2_password
default_collation_for_utf8mb4 utf8mb4_0900_ai_ci
default_password_lifetime 0
default_storage_engine InnoDB
default_table_encryption OFF
default_tmp_storage_engine InnoDB
default_week_format 0
delay_key_write ON
delayed_insert_limit 100
delayed_insert_timeout 300
delayed_queue_size 1000
disabled_storage_engines MyISAM,MRG_MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,CSV,MEMORY
disconnect_on_expired_password ON
div_precision_increment 4
encrypt_tmp_files OFF
end_markers_in_json OFF
enforce_gtid_consistency ON
enforce_storage_engine
eq_range_index_dive_limit 200
event_scheduler ON
expand_fast_index_creation OFF
expire_logs_days 14
explicit_defaults_for_timestamp ON
flush OFF
flush_time 0
foreign_key_checks ON
ft_boolean_syntax + -><()~*:""&|
ft_max_word_len 84
ft_min_word_len 4
ft_query_expansion_limit 20
ft_query_extra_word_chars OFF
ft_stopword_file (built-in)
general_log OFF
general_log_file /var/log/mysql/query.log
generated_random_password_length 20
group_concat_max_len 1024
group_replication_consistency EVENTUAL
gtid_executed 25ebb7f7-7e98-11ec-9280-d72946e4a590:1-4975574,\n5c957b7b-7e98-11ec-bfef-a66c2d9c85c8:1-33915889,\nb6784b10-7e98-11ec-8f56-da520d4c54c1:1-1479013
gtid_executed_compression_period 0
gtid_mode ON
gtid_owned
gtid_purged 25ebb7f7-7e98-11ec-9280-d72946e4a590:1-4975574,\n5c957b7b-7e98-11ec-bfef-a66c2d9c85c8:1-33257380,\nb6784b10-7e98-11ec-8f56-da520d4c54c1:1-1479013
have_backup_locks YES
have_backup_safe_binlog_info YES
have_compress YES
have_dynamic_loading YES
have_geometry YES
have_openssl YES
have_profiling YES
have_query_cache NO
have_rtree_keys YES
have_snapshot_cloning YES
have_ssl YES
have_statement_timeout YES
have_symlink DISABLED
histogram_generation_max_mem_size 20000000
host_cache_size 228
hostname myt-nza7ldt2gfco5nj6.db.yandex.net
information_schema_stats_expiry 86400
init_connect
init_file
init_slave
innodb_adaptive_flushing ON
innodb_adaptive_flushing_lwm 10
innodb_adaptive_hash_index ON
innodb_adaptive_hash_index_parts 8
innodb_adaptive_max_sleep_delay 150000
innodb_api_bk_commit_interval 5
innodb_api_disable_rowlock OFF
innodb_api_enable_binlog OFF
innodb_api_enable_mdl OFF
innodb_api_trx_level 0
innodb_autoextend_increment 64
innodb_autoinc_lock_mode 2
innodb_background_scrub_data_check_interval 3600
innodb_background_scrub_data_compressed OFF
innodb_background_scrub_data_interval 604800
innodb_background_scrub_data_uncompressed OFF
innodb_buffer_pool_chunk_size 33554432
innodb_buffer_pool_dump_at_shutdown ON
innodb_buffer_pool_dump_now OFF
innodb_buffer_pool_dump_pct 25
innodb_buffer_pool_filename ib_buffer_pool
innodb_buffer_pool_in_core_file ON
innodb_buffer_pool_instances 1
innodb_buffer_pool_load_abort OFF
innodb_buffer_pool_load_at_startup ON
innodb_buffer_pool_load_now OFF
innodb_buffer_pool_size 268435456
innodb_change_buffer_max_size 25
innodb_change_buffering all
innodb_checksum_algorithm crc32
innodb_cleaner_lsn_age_factor high_checkpoint
innodb_cmp_per_index_enabled OFF
innodb_commit_concurrency 0
innodb_compressed_columns_threshold 96
innodb_compressed_columns_zip_level 6
innodb_compression_failure_threshold_pct 5
innodb_compression_level 6
innodb_compression_pad_pct_max 50
innodb_concurrency_tickets 5000
innodb_corrupt_table_action assert
innodb_data_file_path ibdata1:12M:autoextend
innodb_data_home_dir
innodb_deadlock_detect ON
innodb_dedicated_server OFF
innodb_default_encryption_key_id 0
innodb_default_row_format dynamic
innodb_directories
innodb_disable_sort_file_cache OFF
innodb_doublewrite ON
innodb_doublewrite_batch_size 0
innodb_doublewrite_dir
innodb_doublewrite_files 2
innodb_doublewrite_pages 4
innodb_empty_free_list_algorithm legacy
innodb_encrypt_online_alter_logs OFF
innodb_encryption_rotate_key_age 1
innodb_encryption_rotation_iops 100
innodb_encryption_threads 0
innodb_extend_and_initialize ON
innodb_fast_shutdown 1
innodb_file_per_table ON
innodb_fill_factor 100
innodb_flush_log_at_timeout 1
innodb_flush_log_at_trx_commit 1
innodb_flush_method O_DIRECT
innodb_flush_neighbors 0
innodb_flush_sync ON
innodb_flushing_avg_loops 30
innodb_force_index_records_in_range 0
innodb_force_load_corrupted OFF
innodb_force_recovery 0
innodb_fsync_threshold 0
innodb_ft_aux_table
innodb_ft_cache_size 8000000
innodb_ft_enable_diag_print OFF
innodb_ft_enable_stopword ON
innodb_ft_ignore_stopwords OFF
innodb_ft_max_token_size 84
innodb_ft_min_token_size 3
innodb_ft_num_word_optimize 2000
innodb_ft_result_cache_limit 2000000000
innodb_ft_server_stopword_table
innodb_ft_sort_pll_degree 2
innodb_ft_total_cache_size 640000000
innodb_ft_user_stopword_table
innodb_idle_flush_pct 100
innodb_immediate_scrub_data_uncompressed OFF
innodb_io_capacity 200
innodb_io_capacity_max 2000
innodb_lock_wait_timeout 50
innodb_log_buffer_size 16777216
innodb_log_checksums ON
innodb_log_compressed_pages ON
innodb_log_file_size 268435456
innodb_log_files_in_group 2
innodb_log_group_home_dir ./
innodb_log_spin_cpu_abs_lwm 80
innodb_log_spin_cpu_pct_hwm 50
innodb_log_wait_for_flush_spin_hwm 400
innodb_log_write_ahead_size 8192
innodb_log_writer_threads ON
innodb_lru_scan_depth 1024
innodb_max_bitmap_file_size 104857600
innodb_max_changed_pages 1000000
innodb_max_dirty_pages_pct 90.000000
innodb_max_dirty_pages_pct_lwm 10.000000
innodb_max_purge_lag 0
innodb_max_purge_lag_delay 0
innodb_max_undo_log_size 67108864
innodb_monitor_disable
innodb_monitor_enable
innodb_monitor_reset
innodb_monitor_reset_all
innodb_numa_interleave OFF
innodb_old_blocks_pct 37
innodb_old_blocks_time 1000
innodb_online_alter_log_max_size 134217728
innodb_open_files 4000
innodb_optimize_fulltext_only OFF
innodb_page_cleaners 1
innodb_page_size 16384
innodb_parallel_dblwr_encrypt OFF
innodb_parallel_doublewrite_path xb_doublewrite
innodb_parallel_read_threads 4
innodb_print_all_deadlocks OFF
innodb_print_ddl_logs OFF
innodb_print_lock_wait_timeout_info OFF
innodb_purge_batch_size 300
innodb_purge_rseg_truncate_frequency 128
innodb_purge_threads 4
innodb_random_read_ahead OFF
innodb_read_ahead_threshold 56
innodb_read_io_threads 4
innodb_read_only OFF
innodb_records_in_range 0
innodb_redo_log_archive_dirs
innodb_redo_log_encrypt OFF
innodb_replication_delay 0
innodb_rollback_on_timeout OFF
innodb_rollback_segments 128
innodb_scrub_log OFF
innodb_scrub_log_speed 256
innodb_show_locks_held 10
innodb_sort_buffer_size 1048576
innodb_spin_wait_delay 6
innodb_spin_wait_pause_multiplier 50
innodb_stats_auto_recalc ON
innodb_stats_include_delete_marked OFF
innodb_stats_method nulls_equal
innodb_stats_on_metadata OFF
innodb_stats_persistent ON
innodb_stats_persistent_sample_pages 20
innodb_stats_transient_sample_pages 8
innodb_status_output OFF
innodb_status_output_locks OFF
innodb_strict_mode ON
innodb_sync_array_size 1
innodb_sync_spin_loops 30
innodb_sys_tablespace_encrypt OFF
innodb_table_locks ON
innodb_temp_data_file_path ibtmp1:12M:autoextend
innodb_temp_tablespace_encrypt OFF
innodb_temp_tablespaces_dir ./#innodb_temp/
innodb_thread_concurrency 0
innodb_thread_sleep_delay 10000
innodb_tmpdir
innodb_track_changed_pages OFF
innodb_undo_directory ./
innodb_undo_log_encrypt OFF
innodb_undo_log_truncate ON
innodb_undo_tablespaces 2
innodb_use_native_aio ON
innodb_validate_tablespace_paths ON
innodb_version 8.0.25-15
innodb_write_io_threads 4
interactive_timeout 28800
internal_tmp_mem_storage_engine TempTable
jemalloc_detected OFF
jemalloc_profiling OFF
join_buffer_size 262144
keep_files_on_create OFF
key_buffer_size 8388608
key_cache_age_threshold 300
key_cache_block_size 1024
key_cache_division_limit 100
keyring_operations ON
kill_idle_transaction 0
large_files_support ON
large_page_size 0
large_pages OFF
lc_messages en_US
lc_messages_dir /usr/share/mysql/
lc_time_names en_US
license GPL
local_infile ON
lock_wait_timeout 31536000
locked_in_memory OFF
log_bin ON
log_bin_basename /var/lib/mysql/mysql-bin-log-myt-nza7ldt2gfco5nj6-db-yandex-net
log_bin_index /var/lib/mysql/mysql-bin-log.index
log_bin_trust_function_creators ON
log_bin_use_v1_row_events OFF
log_error /var/log/mysql/error.log
log_error_services log_filter_internal; log_sink_internal
log_error_suppression_list
log_error_verbosity 3
log_output FILE
log_queries_not_using_indexes OFF
log_raw OFF
log_slave_updates ON
log_slow_admin_statements OFF
log_slow_extra OFF
log_slow_filter
log_slow_rate_limit 1
log_slow_rate_type session
log_slow_slave_statements OFF
log_slow_sp_statements ON
log_slow_verbosity microtime,query_plan,innodb
log_statements_unsafe_for_binlog ON
log_throttle_queries_not_using_indexes 0
log_timestamps SYSTEM
long_query_time 10.000000
low_priority_updates OFF
lower_case_file_system OFF
lower_case_table_names 0
mandatory_roles
master_info_repository TABLE
master_verify_checksum OFF
max_allowed_packet 16777216
max_binlog_cache_size 18446744073709547520
max_binlog_size 104857600
max_binlog_stmt_cache_size 18446744073709547520
max_connect_errors 4294967295
max_connections 100
max_delayed_threads 20
max_digest_length 1024
max_error_count 1024
max_execution_time 0
max_heap_table_size 16777216
max_insert_delayed_threads 20
max_join_size 18446744073709551615
max_length_for_sort_data 4096
max_points_in_geometry 65536
max_prepared_stmt_count 16382
max_relay_log_size 0
max_seeks_for_key 18446744073709551615
max_sort_length 1024
max_sp_recursion_depth 0
max_user_connections 0
max_write_lock_count 18446744073709551615
min_examined_row_limit 0
myisam_data_pointer_size 6
myisam_max_sort_file_size 9223372036853727232
myisam_mmap_size 18446744073709551615
myisam_recover_options OFF
myisam_repair_threads 1
myisam_sort_buffer_size 8388608
myisam_stats_method nulls_unequal
myisam_use_mmap OFF
mysql_native_password_proxy_users OFF
mysqlx_bind_address *
mysqlx_compression_algorithms DEFLATE_STREAM,LZ4_MESSAGE,ZSTD_STREAM
mysqlx_connect_timeout 30
mysqlx_deflate_default_compression_level 3
mysqlx_deflate_max_client_compression_level 5
mysqlx_document_id_unique_prefix 0
mysqlx_enable_hello_notice ON
mysqlx_idle_worker_thread_timeout 60
mysqlx_interactive_timeout 28800
mysqlx_lz4_default_compression_level 2
mysqlx_lz4_max_client_compression_level 8
mysqlx_max_allowed_packet 67108864
mysqlx_max_connections 100
mysqlx_min_worker_threads 2
mysqlx_port 33060
mysqlx_port_open_timeout 0
mysqlx_read_timeout 30
mysqlx_socket /var/run/mysqld/mysqlx.sock
mysqlx_ssl_ca
mysqlx_ssl_capath
mysqlx_ssl_cert
mysqlx_ssl_cipher
mysqlx_ssl_crl
mysqlx_ssl_crlpath
mysqlx_ssl_key
mysqlx_wait_timeout 28800
mysqlx_write_timeout 60
mysqlx_zstd_default_compression_level 3
mysqlx_zstd_max_client_compression_level 11
net_buffer_length 16384
net_buffer_shrink_interval 0
net_read_timeout 30
net_retry_count 10
net_write_timeout 60
new OFF
ngram_token_size 2
offline_mode ON
old OFF
old_alter_table OFF
open_files_limit 262144
optimizer_prune_level 1
optimizer_search_depth 62
optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on,index_condition_pushdown=on,mrr=on,mrr_cost_based=on,block_nested_loop=on,batched_key_access=off,materialization=on,semijoin=on,loosescan=on,firstmatch=on,duplicateweedout=on,subquery_materialization_cost_based=on,use_index_extensions=on,condition_fanout_filter=on,derived_merge=on,use_invisible_indexes=off,skip_scan=on,hash_join=on,subquery_to_derived=off,prefer_ordering_index=on,hypergraph_optimizer=off,derived_condition_pushdown=on,favor_range_scan=off
optimizer_trace enabled=off,one_line=off
optimizer_trace_features greedy_search=on,range_optimizer=on,dynamic_range=on,repeated_subselect=on
optimizer_trace_limit 1
optimizer_trace_max_mem_size 1048576
optimizer_trace_offset -1
parser_max_mem_size 18446744073709551615
partial_revokes OFF
password_history 0
password_require_current OFF
password_reuse_interval 0
performance_schema ON
performance_schema_accounts_size 200
performance_schema_digests_size 10000
performance_schema_error_size 0
performance_schema_events_stages_history_long_size 10000
performance_schema_events_stages_history_size 10
performance_schema_events_statements_history_long_size 10000
performance_schema_events_statements_history_size 10
performance_schema_events_transactions_history_long_size 10000
performance_schema_events_transactions_history_size 10
performance_schema_events_waits_history_long_size 10000
performance_schema_events_waits_history_size 10
performance_schema_hosts_size 200
performance_schema_max_cond_classes 100
performance_schema_max_cond_instances -1
performance_schema_max_digest_length 1024
performance_schema_max_digest_sample_age 60
performance_schema_max_file_classes 80
performance_schema_max_file_handles 32768
performance_schema_max_file_instances -1
performance_schema_max_index_stat -1
performance_schema_max_memory_classes 530
performance_schema_max_metadata_locks -1
performance_schema_max_mutex_classes 340
performance_schema_max_mutex_instances -1
performance_schema_max_prepared_statements_instances -1
performance_schema_max_program_instances -1
performance_schema_max_rwlock_classes 70
performance_schema_max_rwlock_instances -1
performance_schema_max_socket_classes 10
performance_schema_max_socket_instances -1
performance_schema_max_sql_text_length 1024
performance_schema_max_stage_classes 200
performance_schema_max_statement_classes 226
performance_schema_max_statement_stack 10
performance_schema_max_table_handles -1
performance_schema_max_table_instances -1
performance_schema_max_table_lock_stat -1
performance_schema_max_thread_classes 100
performance_schema_max_thread_instances -1
performance_schema_session_connect_attrs_size 512
performance_schema_setup_actors_size -1
performance_schema_setup_objects_size -1
performance_schema_show_processlist OFF
performance_schema_users_size -1
persist_only_admin_x509_subject
persisted_globals_load ON
pid_file /var/run/mysqld/mysqld.pid
plugin_dir /usr/lib/mysql/plugin/
port 3306
preload_buffer_size 32768
print_identified_with_as_hex OFF
profiling OFF
profiling_history_size 15
protocol_compression_algorithms zlib,zstd,uncompressed
protocol_version 10
proxy_protocol_networks
query_alloc_block_size 8192
query_prealloc_size 8192
range_alloc_block_size 4096
range_optimizer_max_mem_size 8388608
rbr_exec_mode STRICT
read_buffer_size 131072
read_only ON
read_rnd_buffer_size 262144
regexp_stack_limit 8000000
regexp_time_limit 32
relay_log mysql-relay-log-myt-nza7ldt2gfco5nj6-db-yandex-net
relay_log_basename /var/lib/mysql/mysql-relay-log-myt-nza7ldt2gfco5nj6-db-yandex-net
relay_log_index /var/lib/mysql/mysql-relay-log.index
relay_log_info_file relay-log.info
relay_log_info_repository TABLE
relay_log_purge ON
relay_log_recovery ON
relay_log_space_limit 0
replication_optimize_for_static_plugin_config OFF
replication_sender_observe_commit_only OFF
report_host myt-nza7ldt2gfco5nj6.db.yandex.net
report_password
report_port 3306
report_user
require_secure_transport OFF
rpl_read_size 8192
rpl_semi_sync_master_enabled OFF
rpl_semi_sync_master_timeout 31536000000
rpl_semi_sync_master_trace_level 32
rpl_semi_sync_master_wait_for_slave_count 1
rpl_semi_sync_master_wait_no_slave ON
rpl_semi_sync_master_wait_point AFTER_SYNC
rpl_semi_sync_slave_enabled OFF
rpl_semi_sync_slave_trace_level 32
rpl_stop_slave_timeout 31536000
schema_definition_cache 256
secondary_engine_cost_threshold 100000.000000
secure_file_priv NULL
select_into_buffer_size 131072
select_into_disk_sync OFF
select_into_disk_sync_delay 0
server_id 4
server_id_bits 32
server_uuid f151da26-7f7b-11ec-a0b3-566c1d4d2df6
session_track_gtids OFF
session_track_schema ON
session_track_state_change OFF
session_track_system_variables time_zone,autocommit,character_set_client,character_set_results,character_set_connection
session_track_transaction_info OFF
sha256_password_auto_generate_rsa_keys ON
sha256_password_private_key_path private_key.pem
sha256_password_proxy_users OFF
sha256_password_public_key_path public_key.pem
show_create_table_verbosity OFF
show_old_temporals OFF
skip_external_locking ON
skip_name_resolve OFF
skip_networking OFF
skip_show_database OFF
skip_slave_start OFF
slave_allow_batching OFF
slave_checkpoint_group 512
slave_checkpoint_period 300
slave_compressed_protocol OFF
slave_exec_mode STRICT
slave_load_tmpdir /var/lib/mysql/.tmp
slave_max_allowed_packet 1073741824
slave_net_timeout 60
slave_parallel_type DATABASE
slave_parallel_workers 0
slave_pending_jobs_size_max 134217728
slave_preserve_commit_order OFF
slave_rows_search_algorithms INDEX_SCAN,HASH_SCAN
slave_skip_errors OFF
slave_sql_verify_checksum ON
slave_transaction_retries 256
slave_type_conversions
slow_launch_time 2
slow_query_log OFF
slow_query_log_always_write_time 10.000000
slow_query_log_file /var/log/mysql/slow-query.log
slow_query_log_use_global_control log_slow_filter,log_slow_rate_limit,log_slow_verbosity,long_query_time,min_examined_row_limit
socket /var/run/mysqld/mysqld.sock
sort_buffer_size 262144
sql_auto_is_null OFF
sql_big_selects ON
sql_buffer_result OFF
sql_log_off OFF
sql_mode ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
sql_notes ON
sql_quote_show_create ON
sql_require_primary_key OFF
sql_safe_updates OFF
sql_select_limit 18446744073709551615
sql_slave_skip_counter 0
sql_warnings OFF
ssl_ca /etc/mysql/ssl/allCAs.pem
ssl_capath
ssl_cert /etc/mysql/ssl/server.crt
ssl_cipher
ssl_crl
ssl_crlpath
ssl_fips_mode OFF
ssl_key /etc/mysql/ssl/server.key
stored_program_cache 256
stored_program_definition_cache 256
super_read_only ON
sync_binlog 1
sync_master_info 10000
sync_relay_log 10000
sync_relay_log_info 10000
system_time_zone MSK
table_definition_cache 2000
table_encryption_privilege_check OFF
table_open_cache 4000
table_open_cache_instances 16
tablespace_definition_cache 256
temptable_max_mmap 1073741824
temptable_max_ram 1073741824
temptable_use_mmap ON
tf_sequence_table_max_upper_bound 1048576
thread_cache_size 10
thread_handling one-thread-per-connection
thread_pool_high_prio_mode transactions
thread_pool_high_prio_tickets 4294967295
thread_pool_idle_timeout 60
thread_pool_max_threads 100000
thread_pool_oversubscribe 3
thread_pool_size 32
thread_pool_stall_limit 500
thread_stack 196608
thread_statistics OFF
time_zone Europe/Moscow
tls_ciphersuites
tls_version TLSv1,TLSv1.1,TLSv1.2,TLSv1.3
tmp_table_size 16777216
tmpdir /var/lib/mysql/.tmp
transaction_alloc_block_size 8192
transaction_isolation REPEATABLE-READ
transaction_prealloc_size 4096
transaction_read_only OFF
transaction_write_set_extraction XXHASH64
unique_checks ON
updatable_views_with_limit YES
userstat OFF
version 8.0.25-15
version_comment Percona Server (GPL), Revision 7df6366
version_compile_machine x86_64
version_compile_os Linux
version_compile_zlib 1.2.11
version_suffix
wait_timeout 28800
windowing_use_high_precision ON
Activity
Yogesh Kore March 19, 2025 at 7:37 AM
Forgot to mention versions:
MySQL: mysql Ver 8.0.32-24 for Linux on x86_64 (Percona Server (GPL), Release 24, Revision e5c6e9d2)
Xtrabackup: xtrabackup version 8.0.35-30 based on MySQL server 8.0.35 Linux (x86_64) (revision id: 6beb4b49)
Yogesh Kore March 19, 2025 at 7:35 AM
Thank you for the report here.
We are seeing the same or similar problems with our backups. Please check below error message.
This has solved for some servers with increasing innodb_max_undo_log_size. But this resolution is inconsistent. We have given innodb_max_undo_log_size size up to 10G (innodb_undo_tablespaces=2) but backup failure happens. Failure is not consistent. Failed backup retry works without any special handling sometimes.
2025-03-17T13:44:29.455707-04:00 1 [ERROR] [MY-012541] [Xtrabackup] An undo ddl truncation (could be automatic) operation has been performed. PXB will not be able to take a consistent backup. Retry the backup operation later or with --lock-ddl
David Ducos December 12, 2024 at 2:34 PMEdited
I think that we need to re open this as I’m seeing this same behavior on xtrabackup version 8.0.35-31.
In the error log I found this entry:
2024-12-08T02:36:23.814141Z 0 [Note] [MY-012994] [InnoDB] Truncating UNDO tablespace innodb_undo_001
And during next backup
2024-12-09T01:45:37.333934-06:00 0 [ERROR] [MY-011825] [Xtrabackup] Found _trunc.log file in server directory. Undo truncation might be concurrently running, Try backup after undo truncation is complete. These *_trunc.log could be left over from previous undo truncation, remove them safely to continue backup. You can also run backup with --lock-ddl=true that blocks concurrent undo truncation
2024-12-09T01:45:37.334010-06:00 0 [ERROR] [MY-011825] [Xtrabackup] xb_load_tablespaces() failed with error code 11
I used --lock-ddl-per-table and --lock-ddl, but in both cases it was not ignoring the *_trunc.log files .
Rahul Malik July 13, 2022 at 11:29 AM
Problem:
Backup fails if there is left over undo truncation(_truc.log) file
present in server data/undo directory.
Analysis:
Due to some bugs in MySQL truncation process does not complete,
leaving MySQL instance alive, but with undo truncation logs present.
PXB during backup tries to fix that by invoking srv_undo_tablespace_fixup_num
on server data/undo directory.
Fix:
PXB should not create undo file on server at any circumstances.
Avoid creating any undo file on server during backup.
PXB backup fails if undo truncation happens during backup
Thank you Dmitry Smal for your contribution for initial patch.
Dmitry Smal June 2, 2022 at 4:22 PM
I don't have any real workload example at the moment.
But on synthetic tests log looks like.
%%
2022-06-02T19:17:41.165987+03:00 6 [Note] [MY-010559] [Repl] Multi-threaded slave statistics for channel '': seconds elapsed = 120; events assigned = 1057793; worker queues filled over overrun level = 0; waited due a Worker queue full = 0; waited due the total size = 0; waited at clock conflicts = 1060574600 waited (count) when Workers occupied = 16473 waited when Workers occupied = 36708176000
2022-06-02T19:18:47.215585+03:00 0 [Note] [MY-012994] [InnoDB] Truncating UNDO tablespace innodb_undo_001
2022-06-02T19:18:52.637678+03:00 0 [Note] [MY-012994] [InnoDB] Truncating UNDO tablespace innodb_undo_002
2022-06-02T19:19:41.304997+03:00 6 [Note] [MY-010559] [Repl] Multi-threaded slave statistics for channel '': seconds elapsed = 120; events assigned = 1337345; worker queues filled over overrun level = 0; waited due a Worker queue full = 0; waited due the total size = 0; waited at clock conflicts = 1118852000 waited (count) when Workers occupied = 20875 waited when Workers occupied = 47806174800
2022-06-02T19:20:57.049286+03:00 0 [Note] [MY-012994] [InnoDB] Truncating UNDO tablespace innodb_undo_002
2022-06-02T19:21:01.707895+03:00 0 [Note] [MY-012994] [InnoDB] Truncating UNDO tablespace innodb_undo_001
%%
We use standard MySQL primary => secondary replication schema.
MySQL secondary instance is running with
--super-read-only
flag.MySQL secondary instance is used for long queries, thus have big undo tablespaces, which are periodically truncated.
Due to some bugs in MySQL (still digging) truncation process does not complete, leaving MySQL instance alive, but with undo truncation logs:
[DEV]root@myt-nza7ldt2gfco5nj6 ~ # ls -alh /var/lib/mysql/undo* -rw-r----- 1 mysql mysql 80M Feb 3 14:08 /var/lib/mysql/undo_001 -rw-r----- 1 mysql mysql 80M Feb 3 14:08 /var/lib/mysql/undo_002 -rw-r----- 1 mysql mysql 16K Feb 3 13:59 /var/lib/mysql/undo_1_trunc.log -rw-r----- 1 mysql mysql 16K Feb 3 14:01 /var/lib/mysql/undo_2_trunc.log
These logs will exist for weeks, until MySQL instance restart.
In such situation, PXB fails to create a backup on secondary instance:
[DEV]root@myt-nza7ldt2gfco5nj6 ~ # /usr/bin/xtrabackup --backup --stream=xbstream --lock-ddl --lock-ddl-timeout=3600 --parallel=1 --datadir=/var/lib/mysql --port=3308 > /dev/null xtrabackup: recognized server arguments: --datadir=/var/lib/mysql --tmpdir=/var/lib/mysql/.tmp --innodb_page_size=16384 --innodb_buffer_pool_size=256M --innodb_file_per_table=1 --innodb_log_buffer_size=16777216 --innodb_log_file_size=268435456 --innodb_adaptive_hash_index=1 --innodb_use_native_aio=1 --innodb_flush_method=O_DIRECT --innodb_flush_log_at_trx_commit=1 --innodb_read_io_threads=4 --innodb_write_io_threads=4 --innodb_io_capacity=200 --server-id=4 --log_bin=mysql-bin-log-myt-nza7ldt2gfco5nj6-db-yandex-net --log-bin-index=/var/lib/mysql/mysql-bin-log.index --datadir=/var/lib/mysql xtrabackup: recognized client arguments: --port=3307 --socket=/var/run/mysqld/mysqld.sock --user=admin --password=* --host=myt-nza7ldt2gfco5nj6.db.yandex.net --port=3307 --backup=1 --stream=xbstream --lock-ddl=1 --lock-ddl-timeout=3600 --parallel=1 --port=3308 /usr/bin/xtrabackup.bak version 8.0.25-17 based on MySQL server 8.0.25 Linux (x86_64) (revision id: a460572) 220203 14:02:31 version_check Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_group=xtrabackup;host=myt-nza7ldt2gfco5nj6.db.yandex.net;port=3308;mysql_socket=/var/run/mysqld/mysqld.sock' as 'admin' (using password: YES). 220203 14:02:31 version_check Connected to MySQL server 220203 14:02:31 version_check Executing a version check against the server... 220203 14:02:31 version_check Done. 220203 14:02:31 Connecting to MySQL server host: myt-nza7ldt2gfco5nj6.db.yandex.net, user: admin, password: set, port: 3308, socket: /var/run/mysqld/mysqld.sock Using server version 8.0.25-15 220203 14:02:32 Executing LOCK TABLES FOR BACKUP... xtrabackup: uses posix_fadvise(). xtrabackup: cd to /var/lib/mysql xtrabackup: open files limit requested 0, set to 1024 xtrabackup: using the following InnoDB configuration: xtrabackup: innodb_data_home_dir = . xtrabackup: innodb_data_file_path = ibdata1:12M:autoextend xtrabackup: innodb_log_group_home_dir = ./ xtrabackup: innodb_log_files_in_group = 2 xtrabackup: innodb_log_file_size = 268435456 2022-02-03 14:02:32 139770467744832 InnoDB: Using Linux native AIO xtrabackup: using O_DIRECT Number of pools: 1 xtrabackup: inititialize_service_handles suceeded 220203 14:02:32 Connecting to MySQL server host: myt-nza7ldt2gfco5nj6.db.yandex.net, user: admin, password: set, port: 3308, socket: /var/run/mysqld/mysqld.sock xtrabackup: Redo Log Archiving is not set up. Starting to parse redo log at lsn = 66688617652 Recovery parsing buffer extended to 4194304. Recovery parsing buffer extended to 8388608. 220203 14:02:33 >> log scanned up to (66707951861) xtrabackup: Generating a list of tablespaces xtrabackup: Generating a list of tablespaces Scanning './' Directory '/var/lib/mysql/.tmp' will not be scanned because it is a hidden directory. Completed space ID check of 2 files. Allocated tablespace ID 2 for mysql/mdb_repl_mon, old maximum was 0 Undo tablespace number 1 was being truncated when mysqld quit. Cannot recover a truncated undo tablespace in read-only mode xtrabackup: error: xb_load_tablespaces() failed with error code 57