2026-02-18 20:29:18 Reason: result differs with reference:  
2026-02-18 20:29:18 --- /home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/tests/queries/0_stateless/01079_parallel_alter_detach_table_zookeeper.reference	2026-02-18 19:40:35.892756987 +0200
2026-02-18 20:29:18 +++ /home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/tests/queries/0_stateless/01079_parallel_alter_detach_table_zookeeper.stdout	2026-02-18 20:29:18.628829040 +0200
2026-02-18 20:29:18 @@ -1,11 +1,15 @@
2026-02-18 20:29:18  1725
2026-02-18 20:29:18  1725
2026-02-18 20:29:18  1725
2026-02-18 20:29:18  Starting alters
2026-02-18 20:29:18  Finishing alters
2026-02-18 20:29:18  1
2026-02-18 20:29:18  0
2026-02-18 20:29:18 +Received exception from server (version 26.2.1):
2026-02-18 20:29:18 +(query: DROP TABLE IF EXISTS concurrent_alter_detach_1)
2026-02-18 20:29:18  1
2026-02-18 20:29:18  0
2026-02-18 20:29:18 +Received exception from server (version 26.2.1):
2026-02-18 20:29:18 +(query: DROP TABLE IF EXISTS concurrent_alter_detach_2)
2026-02-18 20:29:18  1
2026-02-18 20:29:18  0
2026-02-18 20:29:18 
2026-02-18 20:29:18 
2026-02-18 20:29:18 /home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/tests/queries/0_stateless/test_lgv3os3q/01079_parallel_alter_detach_table_zookeeper.sh.debuglog:
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:10] REPLICAS=3
2026-02-18 20:29:18 ++ [2026-02-18 20:21:15] [:12] seq 3
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:12] for i in $(seq $REPLICAS)
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:13] grep -Fv TIMEOUT_EXCEEDED
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:13] /home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse-client --send_logs_level=fatal --database=test_lgv3os3q --log_comment 01079_parallel_alter_detach_table_zookeeper.sh-test_lgv3os3q --max_insert_threads 1 --group_by_two_level_threshold 667697 --group_by_two_level_threshold_bytes 44385929 --distributed_aggregation_memory_efficient 1 --fsync_metadata 0 --output_format_parallel_formatting 0 --input_format_parallel_parsing 1 --min_chunk_bytes_for_parallel_parsing 15544538 --max_read_buffer_size 821517 --prefer_localhost_replica 1 --max_block_size 32767 --max_joined_block_size_rows 44326 --joined_block_split_single_row 1 --join_output_by_rowlist_perkey_rows_threshold 1000000 --max_threads 2 --optimize_append_index 1 --use_hedged_requests 1 --optimize_if_chain_to_multiif 0 --optimize_if_transform_strings_to_enum 0 --optimize_read_in_order 0 --optimize_or_like_chain 1 --optimize_substitute_columns 1 --enable_multiple_prewhere_read_steps 0 --read_in_order_two_level_merge_threshold 85 --optimize_aggregation_in_order 0 --aggregation_in_order_max_block_bytes 46840610 --use_uncompressed_cache 0 --min_bytes_to_use_direct_io 10737418240 --min_bytes_to_use_mmap_io 10737418240 --local_filesystem_read_method pread_threadpool --remote_filesystem_read_method threadpool --local_filesystem_read_prefetch 1 --filesystem_cache_segments_batch_size 100 --read_from_filesystem_cache_if_exists_otherwise_bypass_cache 1 --throw_on_error_from_cache_on_write_operations 1 --remote_filesystem_read_prefetch 0 --distributed_cache_discard_connection_if_unread_data 0 --distributed_cache_use_clients_cache_for_write 0 --distributed_cache_use_clients_cache_for_read 0 --allow_prefetched_read_pool_for_remote_filesystem 0 --filesystem_prefetch_max_memory_usage 128Mi --filesystem_prefetches_limit 0 --filesystem_prefetch_min_bytes_for_single_read_task 16Mi --filesystem_prefetch_step_marks 0 --filesystem_prefetch_step_bytes 0 --enable_filesystem_cache 1 --enable_filesystem_cache_on_write_operations 0 --compile_expressions 0 --compile_aggregate_expressions 1 --compile_sort_description 1 --merge_tree_coarse_index_granularity 24 --optimize_distinct_in_order 1 --max_bytes_before_remerge_sort 2033881898 --min_compress_block_size 1027238 --max_compress_block_size 475666 --merge_tree_compact_parts_min_granules_to_multibuffer_read 76 --optimize_sorting_by_input_stream_properties 1 --http_response_buffer_size 5655961 --http_wait_end_of_query False --enable_memory_bound_merging_of_aggregation_results 1 --min_count_to_compile_expression 3 --min_count_to_compile_aggregate_expression 0 --min_count_to_compile_sort_description 0 --session_timezone America/Hermosillo --use_page_cache_for_disks_without_file_cache False --use_page_cache_for_local_disks False --use_page_cache_for_object_storage False --page_cache_inject_eviction True --merge_tree_read_split_ranges_into_intersecting_and_non_intersecting_injection_probability 0.85 --prefer_external_sort_block_bytes 0 --cross_join_min_rows_to_compress 1 --cross_join_min_bytes_to_compress 0 --min_external_table_block_size_bytes 100000000 --max_parsing_threads 1 --optimize_functions_to_subcolumns 0 --parallel_replicas_local_plan 1 --query_plan_join_swap_table false --enable_vertical_final 1 --optimize_extract_common_expressions 0 --use_async_executor_for_materialized_views 0 --use_query_condition_cache 0 --secondary_indices_enable_bulk_filtering 1 --use_skip_indexes_if_final 1 --use_skip_indexes_on_data_read 1 --optimize_rewrite_like_perfect_affix 1 --input_format_parquet_use_native_reader_v3 1 --enable_lazy_columns_replication 0 --allow_special_serialization_kinds_in_output_formats 0 --short_circuit_function_evaluation_for_nulls_threshold 0.6835340054652665 --automatic_parallel_replicas_mode 0 --temporary_files_buffer_size 821826 --query_plan_optimize_join_order_algorithm greedy --max_bytes_before_external_sort 0 --max_bytes_before_external_group_by 0 --max_bytes_ratio_before_external_sort 0.2 --max_bytes_ratio_before_external_group_by 0.0 --use_skip_indexes_if_final_exact_mode 1 --allow_merge_tree_settings --ratio_of_defaults_for_sparse_serialization 0.11753900819817731 --prefer_fetch_merged_part_size_threshold 1 --vertical_merge_algorithm_min_rows_to_activate 836447 --vertical_merge_algorithm_min_columns_to_activate 81 --allow_vertical_merges_from_compact_to_wide_parts 0 --min_merge_bytes_to_use_direct_io 1 --index_granularity_bytes 18371390 --merge_max_block_size 16577 --index_granularity 18081 --min_bytes_for_wide_part 0 --marks_compress_block_size 14985 --primary_key_compress_block_size 64484 --replace_long_file_name_to_hash 1 --max_file_name_length 61 --min_bytes_for_full_part_storage 536870912 --compact_parts_max_bytes_to_buffer 384873606 --compact_parts_max_granules_to_buffer 159 --compact_parts_merge_max_bytes_to_prefetch_part 7964020 --cache_populated_by_fetch 0 --concurrent_part_removal_threshold 100 --old_parts_lifetime 480 --prewarm_mark_cache 0 --use_const_adaptive_granularity 1 --enable_index_granularity_compression 1 --enable_block_number_column 0 --enable_block_offset_column 0 --use_primary_key_cache 0 --prewarm_primary_key_cache 0 --object_serialization_version v2 --object_shared_data_serialization_version map_with_buckets --object_shared_data_serialization_version_for_zero_level_parts advanced --object_shared_data_buckets_for_compact_part 26 --object_shared_data_buckets_for_wide_part 13 --dynamic_serialization_version v3 --auto_statistics_types uniq,countmin,minmax,tdigest --serialization_info_version basic --string_serialization_version with_size_stream --nullable_serialization_version allow_sparse --enable_shared_storage_snapshot_in_query 1 --min_columns_to_activate_adaptive_write_buffer 673 --reduce_blocking_parts_sleep_ms 253 --shared_merge_tree_outdated_parts_group_size 2 --shared_merge_tree_max_outdated_parts_to_process_at_once 2 --allow_repeated_settings --allow_repeated_settings --client_logs_file=/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/tests/queries/0_stateless/01079_parallel_alter_detach_table_zookeeper.stderr-fatal --query 'DROP TABLE IF EXISTS concurrent_alter_detach_1'
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:13] :
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:12] for i in $(seq $REPLICAS)
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:13] grep -Fv TIMEOUT_EXCEEDED
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:13] /home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse-client --send_logs_level=fatal --database=test_lgv3os3q --log_comment 01079_parallel_alter_detach_table_zookeeper.sh-test_lgv3os3q --max_insert_threads 1 --group_by_two_level_threshold 667697 --group_by_two_level_threshold_bytes 44385929 --distributed_aggregation_memory_efficient 1 --fsync_metadata 0 --output_format_parallel_formatting 0 --input_format_parallel_parsing 1 --min_chunk_bytes_for_parallel_parsing 15544538 --max_read_buffer_size 821517 --prefer_localhost_replica 1 --max_block_size 32767 --max_joined_block_size_rows 44326 --joined_block_split_single_row 1 --join_output_by_rowlist_perkey_rows_threshold 1000000 --max_threads 2 --optimize_append_index 1 --use_hedged_requests 1 --optimize_if_chain_to_multiif 0 --optimize_if_transform_strings_to_enum 0 --optimize_read_in_order 0 --optimize_or_like_chain 1 --optimize_substitute_columns 1 --enable_multiple_prewhere_read_steps 0 --read_in_order_two_level_merge_threshold 85 --optimize_aggregation_in_order 0 --aggregation_in_order_max_block_bytes 46840610 --use_uncompressed_cache 0 --min_bytes_to_use_direct_io 10737418240 --min_bytes_to_use_mmap_io 10737418240 --local_filesystem_read_method pread_threadpool --remote_filesystem_read_method threadpool --local_filesystem_read_prefetch 1 --filesystem_cache_segments_batch_size 100 --read_from_filesystem_cache_if_exists_otherwise_bypass_cache 1 --throw_on_error_from_cache_on_write_operations 1 --remote_filesystem_read_prefetch 0 --distributed_cache_discard_connection_if_unread_data 0 --distributed_cache_use_clients_cache_for_write 0 --distributed_cache_use_clients_cache_for_read 0 --allow_prefetched_read_pool_for_remote_filesystem 0 --filesystem_prefetch_max_memory_usage 128Mi --filesystem_prefetches_limit 0 --filesystem_prefetch_min_bytes_for_single_read_task 16Mi --filesystem_prefetch_step_marks 0 --filesystem_prefetch_step_bytes 0 --enable_filesystem_cache 1 --enable_filesystem_cache_on_write_operations 0 --compile_expressions 0 --compile_aggregate_expressions 1 --compile_sort_description 1 --merge_tree_coarse_index_granularity 24 --optimize_distinct_in_order 1 --max_bytes_before_remerge_sort 2033881898 --min_compress_block_size 1027238 --max_compress_block_size 475666 --merge_tree_compact_parts_min_granules_to_multibuffer_read 76 --optimize_sorting_by_input_stream_properties 1 --http_response_buffer_size 5655961 --http_wait_end_of_query False --enable_memory_bound_merging_of_aggregation_results 1 --min_count_to_compile_expression 3 --min_count_to_compile_aggregate_expression 0 --min_count_to_compile_sort_description 0 --session_timezone America/Hermosillo --use_page_cache_for_disks_without_file_cache False --use_page_cache_for_local_disks False --use_page_cache_for_object_storage False --page_cache_inject_eviction True --merge_tree_read_split_ranges_into_intersecting_and_non_intersecting_injection_probability 0.85 --prefer_external_sort_block_bytes 0 --cross_join_min_rows_to_compress 1 --cross_join_min_bytes_to_compress 0 --min_external_table_block_size_bytes 100000000 --max_parsing_threads 1 --optimize_functions_to_subcolumns 0 --parallel_replicas_local_plan 1 --query_plan_join_swap_table false --enable_vertical_final 1 --optimize_extract_common_expressions 0 --use_async_executor_for_materialized_views 0 --use_query_condition_cache 0 --secondary_indices_enable_bulk_filtering 1 --use_skip_indexes_if_final 1 --use_skip_indexes_on_data_read 1 --optimize_rewrite_like_perfect_affix 1 --input_format_parquet_use_native_reader_v3 1 --enable_lazy_columns_replication 0 --allow_special_serialization_kinds_in_output_formats 0 --short_circuit_function_evaluation_for_nulls_threshold 0.6835340054652665 --automatic_parallel_replicas_mode 0 --temporary_files_buffer_size 821826 --query_plan_optimize_join_order_algorithm greedy --max_bytes_before_external_sort 0 --max_bytes_before_external_group_by 0 --max_bytes_ratio_before_external_sort 0.2 --max_bytes_ratio_before_external_group_by 0.0 --use_skip_indexes_if_final_exact_mode 1 --allow_merge_tree_settings --ratio_of_defaults_for_sparse_serialization 0.11753900819817731 --prefer_fetch_merged_part_size_threshold 1 --vertical_merge_algorithm_min_rows_to_activate 836447 --vertical_merge_algorithm_min_columns_to_activate 81 --allow_vertical_merges_from_compact_to_wide_parts 0 --min_merge_bytes_to_use_direct_io 1 --index_granularity_bytes 18371390 --merge_max_block_size 16577 --index_granularity 18081 --min_bytes_for_wide_part 0 --marks_compress_block_size 14985 --primary_key_compress_block_size 64484 --replace_long_file_name_to_hash 1 --max_file_name_length 61 --min_bytes_for_full_part_storage 536870912 --compact_parts_max_bytes_to_buffer 384873606 --compact_parts_max_granules_to_buffer 159 --compact_parts_merge_max_bytes_to_prefetch_part 7964020 --cache_populated_by_fetch 0 --concurrent_part_removal_threshold 100 --old_parts_lifetime 480 --prewarm_mark_cache 0 --use_const_adaptive_granularity 1 --enable_index_granularity_compression 1 --enable_block_number_column 0 --enable_block_offset_column 0 --use_primary_key_cache 0 --prewarm_primary_key_cache 0 --object_serialization_version v2 --object_shared_data_serialization_version map_with_buckets --object_shared_data_serialization_version_for_zero_level_parts advanced --object_shared_data_buckets_for_compact_part 26 --object_shared_data_buckets_for_wide_part 13 --dynamic_serialization_version v3 --auto_statistics_types uniq,countmin,minmax,tdigest --serialization_info_version basic --string_serialization_version with_size_stream --nullable_serialization_version allow_sparse --enable_shared_storage_snapshot_in_query 1 --min_columns_to_activate_adaptive_write_buffer 673 --reduce_blocking_parts_sleep_ms 253 --shared_merge_tree_outdated_parts_group_size 2 --shared_merge_tree_max_outdated_parts_to_process_at_once 2 --allow_repeated_settings --allow_repeated_settings --client_logs_file=/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/tests/queries/0_stateless/01079_parallel_alter_detach_table_zookeeper.stderr-fatal --query 'DROP TABLE IF EXISTS concurrent_alter_detach_2'
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:13] :
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:12] for i in $(seq $REPLICAS)
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:13] grep -Fv TIMEOUT_EXCEEDED
2026-02-18 20:29:18 + [2026-02-18 20:21:15] [:13] /home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse-client --send_logs_level=fatal --database=test_lgv3os3q --log_comment 01079_parallel_alter_detach_table_zookeeper.sh-test_lgv3os3q --max_insert_threads 1 --group_by_two_level_threshold 667697 --group_by_two_level_threshold_bytes 44385929 --distributed_aggregation_memory_efficient 1 --fsync_metadata 0 --output_format_parallel_formatting 0 --input_format_parallel_parsing 1 --min_chunk_bytes_for_parallel_parsing 15544538 --max_read_buffer_size 821517 --prefer_localhost_replica 1 --max_block_size 32767 --max_joined_block_size_rows 44326 --joined_block_split_single_row 1 --join_output_by_rowlist_perkey_rows_threshold 1000000 --max_threads 2 --optimize_append_index 1 --use_hedged_requests 1 --optimize_if_chain_to_multiif 0 --optimize_if_transform_strings_to_enum 0 --optimize_read_in_order 0 --optimize_or_like_chain 1 --optimize_substitute_columns 1 --enable_multiple_prewhere_read_steps 0 --read_in_order_two_level_merge_threshold 85 --optimize_aggregation_in_order 0 --aggregation_in_order_max_block_bytes 46840610 --use_uncompressed_cache 0 --min_bytes_to_use_direct_io 10737418240 --min_bytes_to_use_mmap_io 10737418240 --local_filesystem_read_method pread_threadpool --remote_filesystem_read_method threadpool --local_filesystem_read_prefetch 1 --filesystem_cache_segments_batch_size 100 --read_from_filesystem_cache_if_exists_otherwise_bypass_cache 1 --throw_on_error_from_cache_on_write_operations 1 --remote_filesystem_read_prefetch 0 --distributed_cache_discard_connection_if_unread_data 0 --distributed_cache_use_clients_cache_for_write 0 --distributed_cache_use_clients_cache_for_read 0 --allow_prefetched_read_pool_for_remote_filesystem 0 --filesystem_prefetch_max_memory_usage 128Mi --filesystem_prefetches_limit 0 --filesystem_prefetch_min_bytes_for_single_read_task 16Mi --filesystem_prefetch_step_marks 0 --filesystem_prefetch_step_bytes 0 --enable_filesystem_cache 1 --enable_filesystem_cache_on_write_