群集中有两个DB。大师（db3.example.com）：
[mysqld]
wsrep_cluster_address = 'gcomm://'
wsrep_provider = /usr/lib/galera/libgalera_smm.so
wsrep_retry_autocommit = 0
wsrep_sst_method = rsync
wsrep_node_address = 12.79.29.209
和slave（db4.example.com）：
[mysqld]
wsrep_cluster_address='gcomm://db3.example.com'
wsrep_provider=/usr/lib/galera/libgalera_smm.so
wsrep_sst_method=rsync
wsrep_sst_receive_address=12.79.29.206
wsrep_node_address = 12.79.29.206
从站无法连接到主站。记录下面。
130821 20:12:04 [Warning] option 'table_cache': unsigned value 2097152 adjusted to 524288
130821 20:12:04 [Warning] The syntax '--log-slow-queries' is deprecated and will be removed in a future release. Please use '--slow-query-log'/'--slow-query-log-file' instead.
130821 20:12:04 [Note] WSREP: Read nil XID from storage engines, skipping position init
130821 20:12:04 [Note] WSREP: wsrep_load(): loading provider library '/usr/lib/galera/libgalera_smm.so'
130821 20:12:04 [Note] WSREP: wsrep_load(): Galera 23.2.4(r147) by Codership Oy <info@codership.com> loaded succesfully.
130821 20:12:04 [Note] WSREP: Found saved state: 00000000-0000-0000-0000-000000000000:-1
130821 20:12:04 [Note] WSREP: Reusing existing '/var/lib/mysql//galera.cache'.
130821 20:12:04 [Note] WSREP: Passing config to GCS: base_host = 12.79.29.206; base_port = 4567; cert.log_conflicts = no; gcache.dir = /var/lib/mysql/; gcache.keep_pages_size = 0; gcache.mem_size = 0; gcache.name = /var/lib/mysql//galera.cache; gcache.page_size = 128M; gcache.size = 128M; gcs.fc_debug = 0; gcs.fc_factor = 1; gcs.fc_limit = 16; gcs.fc_master_slave = NO; gcs.max_packet_size = 64500; gcs.max_throttle = 0.25; gcs.recv_q_hard_limit = 9223372036854775807; gcs.recv_q_soft_limit = 0.25; gcs.sync_donor = NO; replicator.causal_read_timeout = PT30S; replicator.commit_order = 3
130821 20:12:04 [Note] WSREP: Assign initial position for certification: -1, protocol version: -1
130821 20:12:04 [Note] WSREP: wsrep_sst_grab()
130821 20:12:04 [Note] WSREP: Start replication
130821 20:12:04 [Note] WSREP: Setting initial position to 00000000-0000-0000-0000-000000000000:-1
130821 20:12:04 [Note] WSREP: protonet asio version 0
130821 20:12:04 [Note] WSREP: backend: asio
130821 20:12:04 [Note] WSREP: GMCast version 0
130821 20:12:04 [Note] WSREP: (2ecb4dfa-0a8d-11e3-0800-d1d310d8d2ff, 'tcp://0.0.0.0:4567') listening at tcp://0.0.0.0:4567
130821 20:12:04 [Note] WSREP: (2ecb4dfa-0a8d-11e3-0800-d1d310d8d2ff, 'tcp://0.0.0.0:4567') multicast: , ttl: 1
130821 20:12:04 [Note] WSREP: EVS version 0
130821 20:12:04 [Note] WSREP: PC version 0
130821 20:12:04 [Note] WSREP: gcomm: connecting to group 'my_wsrep_cluster', peer 'db3.example.com:'
130821 20:12:04 [Note] WSREP: declaring 1694931b-0a8b-11e3-0800-11c89939f034 stable
130821 20:12:04 [Note] WSREP: Node 1694931b-0a8b-11e3-0800-11c89939f034 state prim
130821 20:12:04 [Note] WSREP: view(view_id(PRIM,1694931b-0a8b-11e3-0800-11c89939f034,4) memb {
1694931b-0a8b-11e3-0800-11c89939f034,
2ecb4dfa-0a8d-11e3-0800-d1d310d8d2ff,
} joined {
} left {
} partitioned {
})
130821 20:12:05 [Note] WSREP: gcomm: connected
130821 20:12:05 [Note] WSREP: Changing maximum packet size to 64500, resulting msg size: 32636
130821 20:12:05 [Note] WSREP: Shifting CLOSED -> OPEN (TO: 0)
130821 20:12:05 [Note] WSREP: Opened channel 'my_wsrep_cluster'
130821 20:12:05 [Note] WSREP: Waiting for SST to complete.
130821 20:12:05 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 1, memb_num = 2
130821 20:12:05 [Note] WSREP: STATE EXCHANGE: Waiting for state UUID.
130821 20:12:05 [Note] WSREP: STATE EXCHANGE: sent state msg: 2f15888a-0a8d-11e3-0800-6af8c4db9fd1
130821 20:12:05 [Note] WSREP: STATE EXCHANGE: got state msg: 2f15888a-0a8d-11e3-0800-6af8c4db9fd1 from 0 (db3.example.com)
130821 20:12:05 [Note] WSREP: STATE EXCHANGE: got state msg: 2f15888a-0a8d-11e3-0800-6af8c4db9fd1 from 1 (db4.example.com)
130821 20:12:05 [Note] WSREP: Quorum results:
version = 2,
component = PRIMARY,
conf_id = 3,
members = 1/2 (joined/total),
act_id = 44,
last_appl. = -1,
protocols = 0/4/2 (gcs/repl/appl),
group UUID = 16a07f81-0a8b-11e3-0800-cbc8be9154ae
130821 20:12:05 [Note] WSREP: Flow-control interval: [23, 23]
130821 20:12:05 [Note] WSREP: Shifting OPEN -> PRIMARY (TO: 44)
130821 20:12:05 [Note] WSREP: State transfer required:
Group state: 16a07f81-0a8b-11e3-0800-cbc8be9154ae:44
Local state: 00000000-0000-0000-0000-000000000000:-1
130821 20:12:05 [Note] WSREP: New cluster view: global state: 16a07f81-0a8b-11e3-0800-cbc8be9154ae:44, view# 4: Primary, number of nodes: 2, my index: 1, protocol version 2
130821 20:12:05 [Warning] WSREP: Gap in state sequence. Need state transfer.
130821 20:12:07 [Note] WSREP: Running: 'wsrep_sst_rsync --role 'joiner' --address '12.79.29.206' --auth '' --datadir '/var/lib/mysql/' --defaults-file '/etc/mysql/my.cnf' --parent '4643''
cat: /var/lib/mysql//rsync_sst.pid: No such file or directory
130821 20:12:07 [Note] WSREP: Prepared SST request: rsync|12.79.29.206:4444/rsync_sst
130821 20:12:07 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.
130821 20:12:07 [Note] WSREP: Assign initial position for certification: 44, protocol version: 2
130821 20:12:07 [Warning] WSREP: Failed to prepare for incremental state transfer: Local state UUID (00000000-0000-0000-0000-000000000000) does not match group state UUID (16a07f81-0a8b-11e3-0800-cbc8be9154ae): 1 (Operation not permitted)
at galera/src/replicator_str.cpp:prepare_for_IST():442. IST will be unavailable.
130821 20:12:07 [Note] WSREP: Node 1 (db4.example.com) requested state transfer from '*any*'. Selected 0 (db3.example.com)(SYNCED) as donor.
130821 20:12:07 [Note] WSREP: Shifting PRIMARY -> JOINER (TO: 44)
130821 20:12:07 [Note] WSREP: Requesting state transfer: success, donor: 0
130821 20:13:10 [Warning] WSREP: 0 (db3.example.com): State transfer to 1 (db4.example.com) failed: -1 (Operation not permitted)
130821 20:13:10 [ERROR] WSREP: gcs/src/gcs_group.c:gcs_group_handle_join_msg():719: Will never receive state. Need to abort.
130821 20:13:10 [Note] WSREP: gcomm: terminating thread
130821 20:13:10 [Note] WSREP: gcomm: joining thread
130821 20:13:10 [Note] WSREP: gcomm: closing backend
130821 20:13:11 [Note] WSREP: view(view_id(NON_PRIM,1694931b-0a8b-11e3-0800-11c89939f034,4) memb {
2ecb4dfa-0a8d-11e3-0800-d1d310d8d2ff,
} joined {
} left {
} partitioned {
1694931b-0a8b-11e3-0800-11c89939f034,
})
130821 20:13:11 [Note] WSREP: view((empty))
130821 20:13:11 [Note] WSREP: gcomm: closed
130821 20:13:11 [Note] WSREP: mysqld: Terminated.
Aborted
root@db4:~# Parent mysqld process (PID:4643) terminated unexpectedly.
/usr//bin/wsrep_sst_common: line 94: /dev/stderr: Permission denied
答案 0 :(得分：8)
在无休止的谷歌搜索后（没有结果），我们发现问题是rsync复制使用的端口4444在服务器之间关闭了。在防火墙上打开端口后（接受彼此的一切）一切正常。
该消息不是很具描述性。所以，如果你最终得到：
[Warning] WSREP: 0 (db3.example.com): State transfer to 1 (db4.example.com) failed: -1 (Operation not permitted)
这可能意味着您的复制设置很好，但连接本身无法正常工作。
修改
这也可能是一个问题，其中rsync守护程序没有正确停止，并且mariadb没有检测到它正在运行。它需要手动杀死以释放4444端口。
答案 1 :(得分：1)
检查服务器之间是否打开port 4444。如果它被防火墙阻止，那么你也会得到同样的错误。