来自python的pg8000 postgres连接问题

Question

我很难在新系统上连接到数据库。Python的版本是相同的。下面是DB的连接字符串，您将看到错误消息的更改，但我无法确定为什么当连接字符串正确时，我会得到以下错误：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/pg8000/__init__.py", line 148, in connect
    user, host, unix_sock, port, database, password, socket_timeout, ssl)
  File "/usr/local/lib/python2.7/dist-packages/pg8000/core.py", line 1157, in __init__
    raise exc_info()[1]
TypeError: cannot concatenate 'str' and 'int' objects

以下是正确的连接字符串：

conn = DBAPI.connect(host='sql2', user='XXX', password='XX', database='XX', socket_timeout=100, port=5432)

当我转变成不正确的东西时：

conn = DBAPI.connect(host='sql2', user='XXX', password='XX', database='XX', socket_timeout=100, port=100)

以及以下错误消息：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/mnt/opt/Centos5.8/python-2.7.4_scipy0.13/lib/python2.7/site-packages/pg8000/__init__.py", line 148, in connect
    user, host, unix_sock, port, database, password, socket_timeout, ssl)
  File "/mnt/opt/Centos5.8/python-2.7.4_scipy0.13/lib/python2.7/site-packages/pg8000/core.py", line 854, in __init__
    raise InterfaceError("communication error", exc_info()[1])
pg8000.errors.InterfaceError: ('communication error', error(111, 'Connection refused'))

我不知道这条错误信息是从哪里来的--似乎是比扎尔。我试过：

在str()中封装字符串放置u'ss'移除端口、添加套接字超时等.

当我查看来自core.py的pg8000代码时，如果您追踪它，它似乎来自于身份验证错误。我认为这个错误(int和str)可能会掩盖身份验证错误。

讯息码

AUTHENTICATION_REQUEST = b("R")

Answer 1

这是一个pg8000中的bug。是修正于in 8000-1.9.11。错误是报告pg8000在试图对数据库进行身份验证时遇到的错误。