复制插槽的PostgreSQL BDR问题_Postgresql_Database Replication_Postgresql 9.4_Multi Master Replication_Postgresql Bdr

复制插槽的PostgreSQL BDR问题

postgresql

复制插槽的PostgreSQL BDR问题,postgresql,database-replication,postgresql-9.4,multi-master-replication,postgresql-bdr,Postgresql,Database Replication,Postgresql 9.4,Multi Master Replication,Postgresql Bdr,如果可以的话，我想先写一个简短的问题摘要，然后再添加更多细节，使我的问题更加清晰：我有一个BDR组在生产环境中运行，复制在所有节点中都可以正常工作，但我在其中一个节点中遇到了复制插槽错误，我希望在不破坏任何其他内容的情况下修复该节点更多详情：我有一个三节点的BDR组运行在PostgreSQL 9.4上，两个节点使用RedHat7，另一个节点使用Centos7。数据库名称为“MCT” 从任何节点到其余节点的复制都能正常工作，但是所有节点的日志中都显示了复制插槽的问题：红帽子1： 2020

如果可以的话，我想先写一个简短的问题摘要，然后再添加更多细节，使我的问题更加清晰：

我有一个BDR组在生产环境中运行，复制在所有节点中都可以正常工作，但我在其中一个节点中遇到了复制插槽错误，我希望在不破坏任何其他内容的情况下修复该节点

更多详情：

我有一个三节点的BDR组运行在PostgreSQL 9.4上，两个节点使用RedHat7，另一个节点使用Centos7。数据库名称为“MCT”

从任何节点到其余节点的复制都能正常工作，但是

所有节点的日志中都显示了复制插槽的问题：

红帽子1：

2020-11-25 13:26:50.051 CET,"postgres","MCT",6607,"192.168.251.30:60463",5fbe4d8a.19cf,1,"idle",2020-11-25 13:26:50 CET,23/0,0,ERROR,55006,"replication slot ""bdr_263746_6182181726884158214_2_16389__"" is already active for pid 6097",,,,,,,,,"bdr (6182181726884158214,2,16389,):receive"

server_addr |lag_bytes|pid |application_name                           |client_addr   |state    |
------------|---------|----|-------------------------------------------|--------------|---------|
172.16.5.180|    21088|6131|bdr (6197060214704992943,2,224093,):receive|172.16.5.184  |streaming|
172.16.5.180|    14440|6097|bdr (6182181726884158214,2,16389,):receive |192.168.251.30|streaming|
172.16.5.180|     3616|6099|bdr (6182181726884158214,2,623638,):receive|192.168.251.30|streaming|

slot_name                                |plugin|slot_type|datoid|database|active|xmin|catalog_xmin|restart_lsn |
-----------------------------------------|------|---------|------|--------|------|----|------------|------------|
bdr_263746_6182181726884158214_2_16389__ |bdr   |logical  |263746|MCT     |true  |    |2466301995  |CE4/CDA614E8|
bdr_263746_6182181726884158214_2_623638__|bdr   |logical  |263746|MCT     |true  |    |2466301995  |CE4/CDA614E8|
bdr_263746_6197060214704992943_2_224093__|bdr   |logical  |263746|MCT     |true  |    |2466301995  |CE4/CDA614E8|

红帽2：

2020-11-25 13:26:36.153 CET,,,2142,,5fbe48a5.85e,1015,,2020-11-25 13:05:57 CET,,0,LOG,00000,"proceso «background worker»: bdr (6182181726884158214,2,16389,)->bdr (6197060214704992943,2, (PID 12152) terminó con código de salida 1",,,,,,,,,""
2020-11-25 13:26:39.375 CET,,,2142,,5fbe48a5.85e,1016,,2020-11-25 13:05:57 CET,,0,LOG,00000,"iniciando el proceso «background worker» «bdr (6182181726884158214,2,16389,)->bdr (6363474972929529353,4,»",,,,,,,,,""
2020-11-25 13:26:39.389 CET,,,12154,,5fbe4d7f.2f7a,1,,2020-11-25 13:26:39 CET,14/0,0,FATAL,XX000,"could not send replication command ""START_REPLICATION SLOT ""bdr_263746_6182181726884158214_2_16389__"" LOGICAL CE4/BD6AF6A8 (pg_version '90410', pg_catversion '201409291', bdr_version '10002', bdr_variant 'BDR', min_bdr_version '700', sizeof_int '4', sizeof_long '8', sizeof_datum '8', maxalign '8', float4_byval '1', float8_byval '1', integer_datetimes '1', bigendian '0', db_encoding 'UTF8', replication_sets '""default""', db_encoding 'UTF8')"": ERROR:  replication slot ""bdr_263746_6182181726884158214_2_16389__"" is already active for pid 6097, sqlstate: 55006",,,,,,,,,"bdr (6182181726884158214,2,16389,): apply"
2020-11-25 13:26:39.390 CET,,,2142,,5fbe48a5.85e,1017,,2020-11-25 13:05:57 CET,,0,LOG,00000,"proceso «background worker»: bdr (6182181726884158214,2,16389,)->bdr (6363474972929529353,4, (PID 12154) terminó con código de salida 1",,,,,,,,,""
2020-11-25 13:26:41.155 CET,,,2142,,5fbe48a5.85e,1018,,2020-11-25 13:05:57 CET,,0,LOG,00000,"iniciando el proceso «background worker» «bdr (6182181726884158214,2,16389,)->bdr (6197060214704992943,2,»",,,,,,,,,""
2020-11-25 13:26:41.165 CET,,,12155,,5fbe4d81.2f7b,1,,2020-11-25 13:26:41 CET,14/0,0,FATAL,XX000,"could not send replication command ""START_REPLICATION SLOT ""bdr_224093_6182181726884158214_2_16389__"" LOGICAL 9B4/F020E568 (pg_version '90410', pg_catversion '201409291', bdr_version '10002', bdr_variant 'BDR', min_bdr_version '700', sizeof_int '4', sizeof_long '8', sizeof_datum '8', maxalign '8', float4_byval '1', float8_byval '1', integer_datetimes '1', bigendian '0', db_encoding 'UTF8', replication_sets '""default""', db_encoding 'UTF8')"": ERROR:  replication slot ""bdr_224093_6182181726884158214_2_16389__"" is already active for pid 2192

server_addr |lag_bytes|pid |application_name                           |client_addr   |state    |
------------|---------|----|-------------------------------------------|--------------|---------|
172.16.5.184|        0|2191|bdr (6182181726884158214,2,623638,):receive|192.168.251.30|streaming|
172.16.5.184|        0|2192|bdr (6182181726884158214,2,16389,):receive |192.168.251.30|streaming|
172.16.5.184|        0|2203|bdr (6363474972929529353,4,263746,):receive|172.16.5.180  |streaming|

slot_name                                |plugin|slot_type|datoid|database|active|xmin|catalog_xmin|restart_lsn |
-----------------------------------------|------|---------|------|--------|------|----|------------|------------|
bdr_224093_6182181726884158214_2_16389__ |bdr   |logical  |224093|MCT     |true  |    |1464775472  |9B4/FED0BCA8|
bdr_224093_6182181726884158214_2_623638__|bdr   |logical  |224093|MCT     |true  |    |1464775472  |9B4/FED0BCA8|
bdr_224093_6363474972929529353_4_263746__|bdr   |logical  |224093|MCT     |true  |    |1464775472  |9B4/FED0BCA8|

1世纪：

2020-11-25 13:26:56.208 CET,"postgres","MCT",2668,"192.168.251.30:55270",5fbe4d90.a6c,1,"idle",2020-11-25 13:26:56 CET,10/0,0,ERROR,55006,"replication slot ""bdr_224093_6182181726884158214_2_16389__"" is already active for pid 2192",,,,,,,,,"bdr (6182181726884158214,2,16389,):receive"

server_addr   |lag_bytes|pid |application_name                           |client_addr   |state    |
--------------|---------|----|-------------------------------------------|--------------|---------|
192.168.251.30|        0|4298|bdr (6182181726884158214,2,16389,):receive |192.168.251.30|streaming|
192.168.251.30|        0|5123|bdr (6197060214704992943,2,224093,):receive|172.16.5.184  |streaming|
192.168.251.30|        0|4313|bdr (6363474972929529353,4,263746,):receive|172.16.5.180  |streaming|

    slot_name                                |plugin|slot_type|datoid|database|active|xmin|catalog_xmin|restart_lsn |
    -----------------------------------------|------|---------|------|--------|------|----|------------|------------|
    bdr_623638_6363474972929529353_4_263746__|bdr   |logical  |623638|MCT     |true  |    |546376380   |85C/647FE110|
    bdr_623638_6182181726884158214_2_16389__ |bdr   |logical  |623638|MCT     |true  |    |546376380   |85C/647FE110|
    bdr_623638_6197060214704992943_2_224093__|bdr   |logical  |623638|MCT     |true  |    |546376380   |85C/647FE110|

如果我运行此查询：

select
    pg_catalog.inet_server_addr() as server_addr,
    pg_xlog_location_diff(pg_current_xlog_insert_location(),
    flush_location)::int8 as lag_bytes,
    pid,
    application_name,
    client_addr,
    state
from
    pg_stat_replication;

select
    slot_name,
    plugin,
    slot_type,
    datoid,
    "database",
    active,
    xmin,
    catalog_xmin,
    restart_lsn
from
    pg_catalog.pg_replication_slots;

我得到了这样的结果：

红帽子1：

2020-11-25 13:26:50.051 CET,"postgres","MCT",6607,"192.168.251.30:60463",5fbe4d8a.19cf,1,"idle",2020-11-25 13:26:50 CET,23/0,0,ERROR,55006,"replication slot ""bdr_263746_6182181726884158214_2_16389__"" is already active for pid 6097",,,,,,,,,"bdr (6182181726884158214,2,16389,):receive"

server_addr |lag_bytes|pid |application_name                           |client_addr   |state    |
------------|---------|----|-------------------------------------------|--------------|---------|
172.16.5.180|    21088|6131|bdr (6197060214704992943,2,224093,):receive|172.16.5.184  |streaming|
172.16.5.180|    14440|6097|bdr (6182181726884158214,2,16389,):receive |192.168.251.30|streaming|
172.16.5.180|     3616|6099|bdr (6182181726884158214,2,623638,):receive|192.168.251.30|streaming|

slot_name                                |plugin|slot_type|datoid|database|active|xmin|catalog_xmin|restart_lsn |
-----------------------------------------|------|---------|------|--------|------|----|------------|------------|
bdr_263746_6182181726884158214_2_16389__ |bdr   |logical  |263746|MCT     |true  |    |2466301995  |CE4/CDA614E8|
bdr_263746_6182181726884158214_2_623638__|bdr   |logical  |263746|MCT     |true  |    |2466301995  |CE4/CDA614E8|
bdr_263746_6197060214704992943_2_224093__|bdr   |logical  |263746|MCT     |true  |    |2466301995  |CE4/CDA614E8|

红帽2：

2020-11-25 13:26:36.153 CET,,,2142,,5fbe48a5.85e,1015,,2020-11-25 13:05:57 CET,,0,LOG,00000,"proceso «background worker»: bdr (6182181726884158214,2,16389,)->bdr (6197060214704992943,2, (PID 12152) terminó con código de salida 1",,,,,,,,,""
2020-11-25 13:26:39.375 CET,,,2142,,5fbe48a5.85e,1016,,2020-11-25 13:05:57 CET,,0,LOG,00000,"iniciando el proceso «background worker» «bdr (6182181726884158214,2,16389,)->bdr (6363474972929529353,4,»",,,,,,,,,""
2020-11-25 13:26:39.389 CET,,,12154,,5fbe4d7f.2f7a,1,,2020-11-25 13:26:39 CET,14/0,0,FATAL,XX000,"could not send replication command ""START_REPLICATION SLOT ""bdr_263746_6182181726884158214_2_16389__"" LOGICAL CE4/BD6AF6A8 (pg_version '90410', pg_catversion '201409291', bdr_version '10002', bdr_variant 'BDR', min_bdr_version '700', sizeof_int '4', sizeof_long '8', sizeof_datum '8', maxalign '8', float4_byval '1', float8_byval '1', integer_datetimes '1', bigendian '0', db_encoding 'UTF8', replication_sets '""default""', db_encoding 'UTF8')"": ERROR:  replication slot ""bdr_263746_6182181726884158214_2_16389__"" is already active for pid 6097, sqlstate: 55006",,,,,,,,,"bdr (6182181726884158214,2,16389,): apply"
2020-11-25 13:26:39.390 CET,,,2142,,5fbe48a5.85e,1017,,2020-11-25 13:05:57 CET,,0,LOG,00000,"proceso «background worker»: bdr (6182181726884158214,2,16389,)->bdr (6363474972929529353,4, (PID 12154) terminó con código de salida 1",,,,,,,,,""
2020-11-25 13:26:41.155 CET,,,2142,,5fbe48a5.85e,1018,,2020-11-25 13:05:57 CET,,0,LOG,00000,"iniciando el proceso «background worker» «bdr (6182181726884158214,2,16389,)->bdr (6197060214704992943,2,»",,,,,,,,,""
2020-11-25 13:26:41.165 CET,,,12155,,5fbe4d81.2f7b,1,,2020-11-25 13:26:41 CET,14/0,0,FATAL,XX000,"could not send replication command ""START_REPLICATION SLOT ""bdr_224093_6182181726884158214_2_16389__"" LOGICAL 9B4/F020E568 (pg_version '90410', pg_catversion '201409291', bdr_version '10002', bdr_variant 'BDR', min_bdr_version '700', sizeof_int '4', sizeof_long '8', sizeof_datum '8', maxalign '8', float4_byval '1', float8_byval '1', integer_datetimes '1', bigendian '0', db_encoding 'UTF8', replication_sets '""default""', db_encoding 'UTF8')"": ERROR:  replication slot ""bdr_224093_6182181726884158214_2_16389__"" is already active for pid 2192

server_addr |lag_bytes|pid |application_name                           |client_addr   |state    |
------------|---------|----|-------------------------------------------|--------------|---------|
172.16.5.184|        0|2191|bdr (6182181726884158214,2,623638,):receive|192.168.251.30|streaming|
172.16.5.184|        0|2192|bdr (6182181726884158214,2,16389,):receive |192.168.251.30|streaming|
172.16.5.184|        0|2203|bdr (6363474972929529353,4,263746,):receive|172.16.5.180  |streaming|

slot_name                                |plugin|slot_type|datoid|database|active|xmin|catalog_xmin|restart_lsn |
-----------------------------------------|------|---------|------|--------|------|----|------------|------------|
bdr_224093_6182181726884158214_2_16389__ |bdr   |logical  |224093|MCT     |true  |    |1464775472  |9B4/FED0BCA8|
bdr_224093_6182181726884158214_2_623638__|bdr   |logical  |224093|MCT     |true  |    |1464775472  |9B4/FED0BCA8|
bdr_224093_6363474972929529353_4_263746__|bdr   |logical  |224093|MCT     |true  |    |1464775472  |9B4/FED0BCA8|

1世纪：

2020-11-25 13:26:56.208 CET,"postgres","MCT",2668,"192.168.251.30:55270",5fbe4d90.a6c,1,"idle",2020-11-25 13:26:56 CET,10/0,0,ERROR,55006,"replication slot ""bdr_224093_6182181726884158214_2_16389__"" is already active for pid 2192",,,,,,,,,"bdr (6182181726884158214,2,16389,):receive"

server_addr   |lag_bytes|pid |application_name                           |client_addr   |state    |
--------------|---------|----|-------------------------------------------|--------------|---------|
192.168.251.30|        0|4298|bdr (6182181726884158214,2,16389,):receive |192.168.251.30|streaming|
192.168.251.30|        0|5123|bdr (6197060214704992943,2,224093,):receive|172.16.5.184  |streaming|
192.168.251.30|        0|4313|bdr (6363474972929529353,4,263746,):receive|172.16.5.180  |streaming|

    slot_name                                |plugin|slot_type|datoid|database|active|xmin|catalog_xmin|restart_lsn |
    -----------------------------------------|------|---------|------|--------|------|----|------------|------------|
    bdr_623638_6363474972929529353_4_263746__|bdr   |logical  |623638|MCT     |true  |    |546376380   |85C/647FE110|
    bdr_623638_6182181726884158214_2_16389__ |bdr   |logical  |623638|MCT     |true  |    |546376380   |85C/647FE110|
    bdr_623638_6197060214704992943_2_224093__|bdr   |logical  |623638|MCT     |true  |    |546376380   |85C/647FE110|

此查询：

select
    pg_catalog.inet_server_addr() as server_addr,
    pg_xlog_location_diff(pg_current_xlog_insert_location(),
    flush_location)::int8 as lag_bytes,
    pid,
    application_name,
    client_addr,
    state
from
    pg_stat_replication;

select
    slot_name,
    plugin,
    slot_type,
    datoid,
    "database",
    active,
    xmin,
    catalog_xmin,
    restart_lsn
from
    pg_catalog.pg_replication_slots;

红帽子1：

2020-11-25 13:26:50.051 CET,"postgres","MCT",6607,"192.168.251.30:60463",5fbe4d8a.19cf,1,"idle",2020-11-25 13:26:50 CET,23/0,0,ERROR,55006,"replication slot ""bdr_263746_6182181726884158214_2_16389__"" is already active for pid 6097",,,,,,,,,"bdr (6182181726884158214,2,16389,):receive"

server_addr |lag_bytes|pid |application_name                           |client_addr   |state    |
------------|---------|----|-------------------------------------------|--------------|---------|
172.16.5.180|    21088|6131|bdr (6197060214704992943,2,224093,):receive|172.16.5.184  |streaming|
172.16.5.180|    14440|6097|bdr (6182181726884158214,2,16389,):receive |192.168.251.30|streaming|
172.16.5.180|     3616|6099|bdr (6182181726884158214,2,623638,):receive|192.168.251.30|streaming|

slot_name                                |plugin|slot_type|datoid|database|active|xmin|catalog_xmin|restart_lsn |
-----------------------------------------|------|---------|------|--------|------|----|------------|------------|
bdr_263746_6182181726884158214_2_16389__ |bdr   |logical  |263746|MCT     |true  |    |2466301995  |CE4/CDA614E8|
bdr_263746_6182181726884158214_2_623638__|bdr   |logical  |263746|MCT     |true  |    |2466301995  |CE4/CDA614E8|
bdr_263746_6197060214704992943_2_224093__|bdr   |logical  |263746|MCT     |true  |    |2466301995  |CE4/CDA614E8|

红帽2：

2020-11-25 13:26:36.153 CET,,,2142,,5fbe48a5.85e,1015,,2020-11-25 13:05:57 CET,,0,LOG,00000,"proceso «background worker»: bdr (6182181726884158214,2,16389,)->bdr (6197060214704992943,2, (PID 12152) terminó con código de salida 1",,,,,,,,,""
2020-11-25 13:26:39.375 CET,,,2142,,5fbe48a5.85e,1016,,2020-11-25 13:05:57 CET,,0,LOG,00000,"iniciando el proceso «background worker» «bdr (6182181726884158214,2,16389,)->bdr (6363474972929529353,4,»",,,,,,,,,""
2020-11-25 13:26:39.389 CET,,,12154,,5fbe4d7f.2f7a,1,,2020-11-25 13:26:39 CET,14/0,0,FATAL,XX000,"could not send replication command ""START_REPLICATION SLOT ""bdr_263746_6182181726884158214_2_16389__"" LOGICAL CE4/BD6AF6A8 (pg_version '90410', pg_catversion '201409291', bdr_version '10002', bdr_variant 'BDR', min_bdr_version '700', sizeof_int '4', sizeof_long '8', sizeof_datum '8', maxalign '8', float4_byval '1', float8_byval '1', integer_datetimes '1', bigendian '0', db_encoding 'UTF8', replication_sets '""default""', db_encoding 'UTF8')"": ERROR:  replication slot ""bdr_263746_6182181726884158214_2_16389__"" is already active for pid 6097, sqlstate: 55006",,,,,,,,,"bdr (6182181726884158214,2,16389,): apply"
2020-11-25 13:26:39.390 CET,,,2142,,5fbe48a5.85e,1017,,2020-11-25 13:05:57 CET,,0,LOG,00000,"proceso «background worker»: bdr (6182181726884158214,2,16389,)->bdr (6363474972929529353,4, (PID 12154) terminó con código de salida 1",,,,,,,,,""
2020-11-25 13:26:41.155 CET,,,2142,,5fbe48a5.85e,1018,,2020-11-25 13:05:57 CET,,0,LOG,00000,"iniciando el proceso «background worker» «bdr (6182181726884158214,2,16389,)->bdr (6197060214704992943,2,»",,,,,,,,,""
2020-11-25 13:26:41.165 CET,,,12155,,5fbe4d81.2f7b,1,,2020-11-25 13:26:41 CET,14/0,0,FATAL,XX000,"could not send replication command ""START_REPLICATION SLOT ""bdr_224093_6182181726884158214_2_16389__"" LOGICAL 9B4/F020E568 (pg_version '90410', pg_catversion '201409291', bdr_version '10002', bdr_variant 'BDR', min_bdr_version '700', sizeof_int '4', sizeof_long '8', sizeof_datum '8', maxalign '8', float4_byval '1', float8_byval '1', integer_datetimes '1', bigendian '0', db_encoding 'UTF8', replication_sets '""default""', db_encoding 'UTF8')"": ERROR:  replication slot ""bdr_224093_6182181726884158214_2_16389__"" is already active for pid 2192

server_addr |lag_bytes|pid |application_name                           |client_addr   |state    |
------------|---------|----|-------------------------------------------|--------------|---------|
172.16.5.184|        0|2191|bdr (6182181726884158214,2,623638,):receive|192.168.251.30|streaming|
172.16.5.184|        0|2192|bdr (6182181726884158214,2,16389,):receive |192.168.251.30|streaming|
172.16.5.184|        0|2203|bdr (6363474972929529353,4,263746,):receive|172.16.5.180  |streaming|

slot_name                                |plugin|slot_type|datoid|database|active|xmin|catalog_xmin|restart_lsn |
-----------------------------------------|------|---------|------|--------|------|----|------------|------------|
bdr_224093_6182181726884158214_2_16389__ |bdr   |logical  |224093|MCT     |true  |    |1464775472  |9B4/FED0BCA8|
bdr_224093_6182181726884158214_2_623638__|bdr   |logical  |224093|MCT     |true  |    |1464775472  |9B4/FED0BCA8|
bdr_224093_6363474972929529353_4_263746__|bdr   |logical  |224093|MCT     |true  |    |1464775472  |9B4/FED0BCA8|

1世纪：

2020-11-25 13:26:56.208 CET,"postgres","MCT",2668,"192.168.251.30:55270",5fbe4d90.a6c,1,"idle",2020-11-25 13:26:56 CET,10/0,0,ERROR,55006,"replication slot ""bdr_224093_6182181726884158214_2_16389__"" is already active for pid 2192",,,,,,,,,"bdr (6182181726884158214,2,16389,):receive"

server_addr   |lag_bytes|pid |application_name                           |client_addr   |state    |
--------------|---------|----|-------------------------------------------|--------------|---------|
192.168.251.30|        0|4298|bdr (6182181726884158214,2,16389,):receive |192.168.251.30|streaming|
192.168.251.30|        0|5123|bdr (6197060214704992943,2,224093,):receive|172.16.5.184  |streaming|
192.168.251.30|        0|4313|bdr (6363474972929529353,4,263746,):receive|172.16.5.180  |streaming|

    slot_name                                |plugin|slot_type|datoid|database|active|xmin|catalog_xmin|restart_lsn |
    -----------------------------------------|------|---------|------|--------|------|----|------------|------------|
    bdr_623638_6363474972929529353_4_263746__|bdr   |logical  |623638|MCT     |true  |    |546376380   |85C/647FE110|
    bdr_623638_6182181726884158214_2_16389__ |bdr   |logical  |623638|MCT     |true  |    |546376380   |85C/647FE110|
    bdr_623638_6197060214704992943_2_224093__|bdr   |logical  |623638|MCT     |true  |    |546376380   |85C/647FE110|

因此，我想知道如何在不破坏BDR中目前正在生产的任何内容的情况下消除该错误

有什么想法吗

提前谢谢你

根本问题是REDHAT_2节点中的第二个名为“OLD”的DB，它试图与所有节点中的“MCT”同步，并获得复制插槽的所有权，因此真正的“MCT”节点无法真正打开连接

在“旧”数据库中关闭BDR并重新启动PSQL解决了这个问题。谢谢