[BDR] Node Join Question
| От | Wayne E. Seguin |
|---|---|
| Тема | [BDR] Node Join Question |
| Дата | |
| Msg-id | CANf8RLvYXsLPxOHUcSvdBcVNkTmNiHKkMY2_ncer3egky+ac+g@mail.gmail.com обсуждение исходный текст |
| Ответы |
Re: [BDR] Node Join Question
Re: [BDR] Node Join Question |
| Список | pgsql-general |
To the wonderful BDR folks,
I have a 5 node pg+bdr cluster that I've spun up. I have verified that each node can connect via psql to each other node. I am having an issue creating the bdr group and having the nodes join each other.
The steps I am taking are as follows (I used pg compiled using getting started guide instructions):
1. initdb
2. start postgres
3. create database pgbdr
4. create extension btree_gist (actually I'm doing this on template1 for my purposes)
5. create extension bdr
6. on node 0 I am doing:
SELECT bdr.bdr_group_create(
local_node_name := 'pgbdr0',
node_external_dsn := 'host=10.244.2.2 port=5432 user=postgres dbname=pgbdr'
);
7. on nodes 1-4 I am doing (adjusted for the nodes IP):
SELECT bdr.bdr_group_join(
local_node_name := 'pgbdr1',
node_external_dsn := 'host=10.244.2.6 port=5432 user=postgres dbname=pgbdr',
join_using_dsn := 'host=10.244.2.2 port=5432 user=postgres dbname=pgbdr'
);
Sometimes this works and all nodes are joined, but it isn't consistent and I'm not sure at the moment how to debug why.
From the most recent attempt on node 0:
pgbdr=# SELECT * FROM bdr.bdr_nodes;
node_sysid | node_timeline | node_dboid | node_status | node_name | node_local_dsn | node_init_from_dsn
---------------------+---------------+------------+-------------+-----------+------------------------------------------------------+--------------------
6147857338297172162 | 1 | 16908 | r | rdpg0 | host=10.244.2.2 port=5432 user=postgres dbname=pgbdr |
(1 row)
From the most recent attempt on node 1:
pgbdr=# SELECT * FROM bdr.bdr_nodes;
node_sysid | node_timeline | node_dboid | node_status | node_name | node_local_dsn | node_init_from_d
sn
---------------------+---------------+------------+-------------+-----------+------------------------------------------------------+----------------------------------
--------------------
6147857345042854082 | 1 | 16908 | i | rdpg1 | host=10.244.2.6 port=5432 user=postgres dbname=pgbdr | host=10.244.2.2 port=5432 user=po
stgres dbname=pgbdr
(1 row)
I have pasted some relevant logs from node 0 further below.
Even if I use 'SELECT bdr.bdr_node_join_wait_for_ready();' it will usually just hang.
How can I debug why the nodes are not connecting to each other find out where they getting stuck trying to join?
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init DEBUG: 00000: received replication command: IDENTIFY_SYSTEM [171/773]
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init LOCATION: exec_replication_command, walsender.c:1291
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init DEBUG: 00000: received replication command: CREATE_REPLICATION_SLOT "bdr_16908_6147857345042854082_1_16908__"
LOGICAL bdr
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init LOCATION: exec_replication_command, walsender.c:1291
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init DEBUG: 00000: searching for logical decoding starting point, starting at 0/18E87A0
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init LOCATION: DecodingContextFindStartpoint, logical.c:469
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init LOG: 00000: logical decoding found consistent point at 0/18E87A0
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init DETAIL: There are no running transactions.
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init LOCATION: SnapBuildFindSnapshot, snapbuild.c:1271
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init LOG: 00000: exported logical decoding snapshot: "0000071E-1" with 0 transaction IDs
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init LOCATION: SnapBuildExportSnapshot, snapbuild.c:604
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init DEBUG: 00000: received replication command: IDENTIFY_SYSTEM
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOCATION: exec_replication_command, walsender.c:1291
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init DEBUG: 00000: received replication command: CREATE_REPLICATION_SLOT "bdr_16908_6147857344392790209_1_16908__"
LOGICAL bdr
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOCATION: exec_replication_command, walsender.c:1291
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init DEBUG: 00000: searching for logical decoding starting point, starting at 0/18EC970
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOCATION: DecodingContextFindStartpoint, logical.c:469
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOG: 00000: logical decoding found initial starting point at 0/18EC970
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init DETAIL: 1 transaction needs to finish.
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOCATION: SnapBuildFindSnapshot, snapbuild.c:1338
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init DEBUG: 00000: received replication command: IDENTIFY_SYSTEM
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOCATION: exec_replication_command, walsender.c:1291
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init DEBUG: 00000: received replication command: CREATE_REPLICATION_SLOT "bdr_16908_6147857340000055490_1_16908__"
LOGICAL bdr
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOCATION: exec_replication_command, walsender.c:1291
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init LOG: 08006: unexpected EOF on client connection with an open transaction
d=pgbdr p=412 a=bdr (6147857345042854082,1,16908,):init LOCATION: SocketBackend, postgres.c:344
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init DEBUG: 00000: searching for logical decoding starting point, starting at 0/18EC9F0
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOCATION: DecodingContextFindStartpoint, logical.c:469
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOG: 00000: logical decoding found initial starting point at 0/18EC9F0
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init DETAIL: 1 transaction needs to finish.
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOCATION: SnapBuildFindSnapshot, snapbuild.c:1338
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOG: 00000: logical decoding found consistent point at 0/18ECA30
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init DETAIL: Transaction ID 1822 finished; no more running transactions.
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOCATION: SnapBuildEndTxn, snapbuild.c:907
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOG: 00000: logical decoding found consistent point at 0/18ECA30
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init DETAIL: Transaction ID 1822 finished; no more running transactions.
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOCATION: SnapBuildEndTxn, snapbuild.c:907
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOG: 00000: exported logical decoding snapshot: "00000720-1" with 0 transaction IDs
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOCATION: SnapBuildExportSnapshot, snapbuild.c:604
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOG: 00000: exported logical decoding snapshot: "0000071F-1" with 1 transaction ID
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOCATION: SnapBuildExportSnapshot, snapbuild.c:604
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init DEBUG: 00000: received replication command: IDENTIFY_SYSTEM
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOCATION: exec_replication_command, walsender.c:1291
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init DEBUG: 00000: received replication command: CREATE_REPLICATION_SLOT "bdr_16908_6147857340923527359_1_16908__"
LOGICAL bdr
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOCATION: exec_replication_command, walsender.c:1291
d= p=392 a=DEBUG: 00000: started 0 elections
d= p=392 a=LOCATION: bdr_sequencer_start_elections, bdr_seq.c:688
d= p=392 a=DEBUG: 00000: started 0 votes
d= p=392 a=LOCATION: bdr_sequencer_vote, bdr_seq.c:629
d= p=392 a=DEBUG: 00000: tallied 0 elections
d= p=392 a=LOCATION: bdr_sequencer_tally, bdr_seq.c:755
d= p=392 a=DEBUG: 00000: checked 0 sequences for filling
d= p=392 a=LOCATION: bdr_sequencer_fill_sequences, bdr_seq.c:1034
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOG: 08006: unexpected EOF on client connection with an open transaction
d=pgbdr p=422 a=bdr (6147857340000055490,1,16908,):init LOCATION: SocketBackend, postgres.c:344
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOG: 08006: unexpected EOF on client connection with an open transaction
d=pgbdr p=417 a=bdr (6147857344392790209,1,16908,):init LOCATION: SocketBackend, postgres.c:344
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init DEBUG: 00000: searching for logical decoding starting point, starting at 0/18ECA60
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOCATION: DecodingContextFindStartpoint, logical.c:469
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOG: 00000: logical decoding found initial starting point at 0/18ECA60
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init DETAIL: 2 transactions need to finish.
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOCATION: SnapBuildFindSnapshot, snapbuild.c:1338
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOG: 00000: logical decoding found consistent point at 0/18ECAD0
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init DETAIL: Transaction ID 1823 finished; no more running transactions.
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOCATION: SnapBuildEndTxn, snapbuild.c:907
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOG: 00000: exported logical decoding snapshot: "00000721-1" with 0 transaction IDs
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOCATION: SnapBuildExportSnapshot, snapbuild.c:604
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOG: 08006: unexpected EOF on client connection with an open transaction
d=pgbdr p=426 a=bdr (6147857340923527359,1,16908,):init LOCATION: SocketBackend, postgres.c:344
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