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  1. MariaDB Server
  2. MDEV-22382

Cluster nodes out of sync without error/warning message

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Incomplete
    • 10.2.9
    • N/A
    • Galera
    • None

    Description

      We are running a 3 (A,B,C) nodes (8cores, 16GB) mariadb galera cluster on production. The applications only connect to A node with read/write account. Recently we found the B and C were of sync with A and only the schema change and some databases can be syncd to each other. (Use InnoDB engine).

      From the SHOW STATUS LIKE 'wsrep%' for each node , both 3 nodes has the same wsrep_cluster_state_uuid and wsrep_local_state_uuid , the wsrep_local_state_comment was labeled as 'synced'.

      How to trouble shooting and resolve this kind of issue ?

      Node A:

      wsrep_apply_oooe	0.039301
      wsrep_apply_oool	0.000004
      wsrep_apply_window	1.075744
      wsrep_causal_reads	0
      wsrep_cert_deps_distance	47.902862
      wsrep_cert_index_size	202
      wsrep_cert_interval	0.086835
      wsrep_cluster_conf_id	5
      wsrep_cluster_size	3
      wsrep_cluster_state_uuid	a6cb55bc-5d73-11e9-9715-5b7096acd7d4
      wsrep_cluster_status	Primary
      wsrep_commit_oooe	0.000000
      wsrep_commit_oool	0.000000
      wsrep_commit_window	1.036447
      wsrep_connected	ON
      wsrep_desync_count	0
      wsrep_evs_delayed	
      wsrep_evs_evict_list	
      wsrep_evs_repl_latency	0.000386854/0.000641471/0.00101774/0.000170883/41
      wsrep_evs_state	OPERATIONAL
      wsrep_flow_control_paused	0.000121
      wsrep_flow_control_paused_ns	1499988210973
      wsrep_flow_control_recv	19783
      wsrep_flow_control_sent	0
      wsrep_gcomm_uuid	0dfcdc42-1801-11ea-8ca9-76317559752c
      wsrep_incoming_addresses	192.168.10.12:3306,192.168.10.13:3306,192.168.10.11:3306
      wsrep_last_committed	49328708
      wsrep_local_bf_aborts	1
      wsrep_local_cached_downto	49320131
      wsrep_local_cert_failures	5
      wsrep_local_commits	17453848
      wsrep_local_index	0
      wsrep_local_recv_queue	0
      wsrep_local_recv_queue_avg	0.001017
      wsrep_local_recv_queue_max	2
      wsrep_local_recv_queue_min	0
      wsrep_local_replays	4
      wsrep_local_send_queue	0
      wsrep_local_send_queue_avg	0.011968
      wsrep_local_send_queue_max	215
      wsrep_local_send_queue_min	0
      wsrep_local_state	4
      wsrep_local_state_comment	Synced
      wsrep_local_state_uuid	a6cb55bc-5d73-11e9-9715-5b7096acd7d4
      wsrep_protocol_version	7
      wsrep_provider_name	Galera
      wsrep_provider_vendor	Codership Oy <info@codership.com>
      wsrep_provider_version	25.3.20(r3703)
      wsrep_ready	ON
      wsrep_received	212459
      wsrep_received_bytes	2386091
      wsrep_repl_data_bytes	137697330836
      wsrep_repl_keys	231049449
      wsrep_repl_keys_bytes	2251998858
      wsrep_repl_other_bytes	0
      wsrep_replicated	17455391
      wsrep_replicated_bytes	157381443713
      wsrep_thread_count	2
      

      Node C:

      wsrep_apply_oooe	0.000000
      wsrep_apply_oool	0.000000
      wsrep_apply_window	1.000000
      wsrep_causal_reads	0
      wsrep_cert_deps_distance	47.901373
      wsrep_cert_index_size	936
      wsrep_cert_interval	0.086837
      wsrep_cluster_conf_id	5
      wsrep_cluster_size	3
      wsrep_cluster_state_uuid	a6cb55bc-5d73-11e9-9715-5b7096acd7d4
      wsrep_cluster_status	Primary
      wsrep_commit_oooe	0.000000
      wsrep_commit_oool	0.000000
      wsrep_commit_window	1.000000
      wsrep_connected	ON
      wsrep_desync_count	0
      wsrep_evs_delayed	
      wsrep_evs_evict_list	
      wsrep_evs_repl_latency	0/0/0/0/0
      wsrep_evs_state	OPERATIONAL
      wsrep_flow_control_paused	0.000121
      wsrep_flow_control_paused_ns	1499874188022
      wsrep_flow_control_recv	19783
      wsrep_flow_control_sent	18513
      wsrep_gcomm_uuid	5bc64b98-1802-11ea-86f3-3f1bc40b6f50
      wsrep_incoming_addresses	192.168.10.12:3306,192.168.10.13:3306,192.168.10.11:3306
      wsrep_last_committed	49329044
      wsrep_local_bf_aborts	18
      wsrep_local_cached_downto	49320471
      wsrep_local_cert_failures	0
      wsrep_local_commits	21
      wsrep_local_index	1
      wsrep_local_recv_queue	0
      wsrep_local_recv_queue_avg	0.182513
      wsrep_local_recv_queue_max	1179
      wsrep_local_recv_queue_min	0
      wsrep_local_replays	0
      wsrep_local_send_queue	0
      wsrep_local_send_queue_avg	0.000005
      wsrep_local_send_queue_max	2
      wsrep_local_send_queue_min	0
      wsrep_local_state	4
      wsrep_local_state_comment	Synced
      wsrep_local_state_uuid	a6cb55bc-5d73-11e9-9715-5b7096acd7d4
      wsrep_protocol_version	7
      wsrep_provider_name	Galera
      wsrep_provider_vendor	Codership Oy <info@codership.com>
      wsrep_provider_version	25.3.20(r3703)
      wsrep_ready	ON
      wsrep_received	17668083
      wsrep_received_bytes	157389215710
      wsrep_repl_data_bytes	658359
      wsrep_repl_keys	2770
      wsrep_repl_keys_bytes	22649
      wsrep_repl_other_bytes	0
      wsrep_replicated	21
      wsrep_replicated_bytes	682352
      wsrep_thread_count	2
      

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            jplindst Jan Lindström (Inactive)
            chen eason
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              Updated:
              Resolved:

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