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Accepted
Luan Huynh
Asked: 2015-03-06 18:06:08 +0800 CST

Pgpool II：无法读取两个网络接口之间的消息长度

  • 772

启动日志文件：

2015-03-06 01:57:56: pid 2760: LOG:  Setting up socket for 0.0.0.0:9999
2015-03-06 01:57:56: pid 2760: LOG:  Setting up socket for :::9999
2015-03-06 01:57:56: pid 2760: LOG:  pgpool-II successfully started. version 3.4.
0 (tataraboshi)
2015-03-06 01:57:56: pid 2760: LOG:  find_primary_node: checking backend no 0
2015-03-06 01:57:56: pid 2760: LOG:  find_primary_node: primary node id is 0
2015-03-06 01:58:02: pid 2792: ERROR:  unable to read message length
2015-03-06 01:58:02: pid 2792: DETAIL:  message length (8) in slot 1 does not mat
ch with slot 0(12)

调试日志文件：

2015-03-06 01:55:07: pid 2680: LOG:  find_primary_node: primary node id is 0
2015-03-06 01:55:42: pid 2712: DEBUG:  I am 2712 accept fd 6
2015-03-06 01:55:42: pid 2712: DEBUG:  reading startup packet
2015-03-06 01:55:42: pid 2712: DETAIL:  Protocol Major: 1234 Minor: 5679 database
:  user: 
2015-03-06 01:55:42: pid 2712: DEBUG:  selecting backend connection
2015-03-06 01:55:42: pid 2712: DETAIL:  SSLRequest from client
2015-03-06 01:55:42: pid 2712: DEBUG:  reading startup packet
2015-03-06 01:55:42: pid 2712: DETAIL:  application_name: psql
2015-03-06 01:55:42: pid 2712: DEBUG:  reading startup packet
2015-03-06 01:55:42: pid 2712: DETAIL:  Protocol Major: 3 Minor: 0 database: post
gres user: enterprisedb
2015-03-06 01:55:42: pid 2712: DEBUG:  creating new connection to backend
2015-03-06 01:55:42: pid 2712: DETAIL:  connecting 0 backend
2015-03-06 01:55:42: pid 2712: DEBUG:  creating new connection to backend
2015-03-06 01:55:42: pid 2712: DETAIL:  connecting 1 backend
2015-03-06 01:55:42: pid 2712: DEBUG:  reading message length
2015-03-06 01:55:42: pid 2712: DETAIL:  slot: 0 length: 12
2015-03-06 01:55:42: pid 2712: DEBUG:  reading message length
2015-03-06 01:55:42: pid 2712: DETAIL:  slot: 1 length: 8
2015-03-06 01:55:42: pid 2712: ERROR:  unable to read message length
2015-03-06 01:55:42: pid 2712: DETAIL:  message length (8) in slot 1 does not mat
ch with slot 0(12)

psql 命令：

[enterprisedb@testing_ppas93]$ psql -h localhost -p 9999 -d postgres
psql: server closed the connection unexpectedly
        This probably means the server terminated abnormally
        before or while processing the request

我使用 pgpool II 来控制两台服务器之间的故障转移事件（谷歌云上的主服务器，我本地的从属服务器，centos x64，数据库：Postgres Plus Advanced Server 9.3）。当我尝试通过端口 9999 (example: psql -h localhost -p 9999 -d postgres) 连接我的数据库时，pgpool 会引发错误

错误：无法读取消息长度

postgresql pgpool

1 个回答

  1. Best Answer

    关于上面的错误，由于 pgpool 和从服务器之间的连接，如果我将pgpool 主机的从属pg_hba.conf从 md5 更改为 trust，它工作正常。

    两种修复方法：

    1. ssh配置包括：pgpool、slave、master。
    2. 在pg_hba.conf中为 pgpool设置信任方法。
    • 2

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