我有一个Postgres BDR集群，有3个节点“Ready”和3个节点“Parted”。
如果我SELECT * FROM bdr.bdr_nodes，则会显示以下信息：
-[ RECORD 1 ]------+-------------------------
node_sysid | 6153716379158074503
node_timeline | 1
node_dboid | 16385
node_status | r
node_name | node3
node_local_dsn | host=x.x.x.241 [...]
node_init_from_dsn | host=x.x.x.47 [...]
-[ RECORD 2 ]------+-------------------------
node_sysid | 6153716914784688297
node_timeline | 1
node_dboid | 16385
node_status | r
node_name | node2
node_local_dsn | host=x.x.x.5 [...]
node_init_from_dsn | host=x.x.x.47 [...]
-[ RECORD 3 ]------+-------------------------
node_sysid | 6170758438846557459
node_timeline | 1
node_dboid | 16384
node_status | r
node_name | node4
node_local_dsn | host=x.x.x.128 [...]
node_init_from_dsn | host=x.x.x.47 [...]
-[ RECORD 4 ]------+-------------------------
node_sysid | 6153716402564903569
node_timeline | 1
node_dboid | 16385
node_status | k
node_name | node1
node_local_dsn | host=x.x.x.47 [...]
node_init_from_dsn |
-[ RECORD 5 ]------+-------------------------
node_sysid | 6170830020100809103
node_timeline | 1
node_dboid | 16385
node_status | k
node_name | node6
node_local_dsn | host=x.x.x.48 [...]
node_init_from_dsn | host=x.x.x.241 [...]
-[ RECORD 6 ]------+-------------------------
node_sysid | 6170839982079996801
node_timeline | 1
node_dboid | 16385
node_status | c
node_name | node8
node_local_dsn | host=x.x.x.142 [...]
node_init_from_dsn | host=x.x.x.241 [...]
-[ RECORD 7 ]------+-------------------------
node_sysid | 6170833985333433816
node_timeline | 1
node_dboid | 16385
node_status | k
node_name | node7
node_local_dsn | host=x.x.x.48 [...]
node_init_from_dsn | host=x.x.x.241 [...]
我正在尝试加入node8。但它不会发生。错误如下：
d= p=5521 a=ERROR: 08006: could not connect to the primary server: could not connect to server: Connection timed out
Is the server running on host "x.x.x.48" and accepting
TCP/IP connections on port 5432?
d= p=5521 a=DETAIL: Connection string is 'host=x.x.x.48 [...]'
该错误意味着它正在尝试连接到已被杀死或删除的节点。为什么尝试连接到被杀死或删除的节点？我该如何解决这种情况？
以下命令用于加入node8
SELECT bdr.bdr_group_join(
local_node_name := 'node8',
node_external_dsn := 'host=x.x.x.142 [...]',
join_using_dsn := 'host=x.x.x.241 [...]'
);
根据this instructions（Debian Wheezy）安装了BDR：
curl -sSL https://manageacloud.com/api/cm/configuration/postgresql-bdr/debian/manageacloud-production-script.sh | bash
表bdr.bdr_connections：
-[ RECORD 1 ]----------+---------------------
conn_sysid | 6170839982079996801
conn_timeline | 1
conn_dboid | 16385
conn_origin_sysid | 0
conn_origin_timeline | 0
conn_origin_dboid | 0
conn_is_unidirectional | f
conn_dsn | host=x.x.x.142 [...]
conn_apply_delay |
conn_replication_sets | {default}
-[ RECORD 2 ]----------+----------------------
conn_sysid | 6153716402564903569
conn_timeline | 1
conn_dboid | 16385
conn_origin_sysid | 0
conn_origin_timeline | 0
conn_origin_dboid | 0
conn_is_unidirectional | f
conn_dsn | host=x.x.x.47 [...]
conn_apply_delay |
conn_replication_sets | {default}
-[ RECORD 3 ]----------+-----------------------
conn_sysid | 6153716379158074503
conn_timeline | 1
conn_dboid | 16385
conn_origin_sysid | 0
conn_origin_timeline | 0
conn_origin_dboid | 0
conn_is_unidirectional | f
conn_dsn | host=x.x.x.241 [...]
conn_apply_delay |
conn_replication_sets | {default}
-[ RECORD 4 ]----------+-----------------------
conn_sysid | 6153716914784688297
conn_timeline | 1
conn_dboid | 16385
conn_origin_sysid | 0
conn_origin_timeline | 0
conn_origin_dboid | 0
conn_is_unidirectional | f
conn_dsn | host=x.x.x.5 [...]
conn_apply_delay |
conn_replication_sets | {default}
-[ RECORD 5 ]----------+-----------------------
conn_sysid | 6170758438846557459
conn_timeline | 1
conn_dboid | 16384
conn_origin_sysid | 0
conn_origin_timeline | 0
conn_origin_dboid | 0
conn_is_unidirectional | f
conn_dsn | host=x.x.x.128 [...]
conn_apply_delay |
conn_replication_sets | {default}
版本：
# SELECT bdr.bdr_version();
bdr_version
-------------------
0.9.1-2015-05-26-
(1 row)
答案 0 :(得分：2)
这是BDR中的一个错误。我刚刚在body树的本地副本中修复了它，并在我在本地测试后将更改推送到bdr-plugin/next以包含在0.9.3中。
问题在于，作为节点连接的一部分，我们在基于对等体的插槽创建期间基于bdr-plugin/REL0_9_STABLE过滤掉了bdr.bdr_connections行。
删除没有相应bdr.bdr_nodes.state条目的任何bdr.bdr_connections条目，或bdr.bdr_nodes条目bdr.bdr_nodes在0.9.2及更早版本中解决此问题的方法是安全的