错误：无法连接到cassandra服务器。未配置表 [英] Error: unable to connect to cassandra server. Unconfigured table

问题描述

我正在尝试使用此简单代码通过python的cassandra-driver连接到在本地桌面上运行的cassandra。

I am trying to connect to cassandra, which is running on local desktop, via cassandra-driver for python using this simple code.

 from cassandra.cluster import Cluster
 cluster = Cluster()
 session = cluster.connect()

并显示此错误： NoHostAvailable：（'无法连接到任何服务器'，{'127.0.0.1'：InvalidRequest（u'code = 2200 [Invalid query] message = unconfigured table schema_keyspaces'，）}）

and getting this error: NoHostAvailable: ('Unable to connect to any servers', {'127.0.0.1': InvalidRequest(u'code=2200 [Invalid query] message="unconfigured table schema_keyspaces"',)})

从cassandra的日志中，我看到它是如何建立连接的，但是会出现以下错误：

From the logs of cassandra, I see how it does establish connection, but it gets this errors:

DEBUG 05:51:00 Responding: ERROR INVALID: unconfigured table schema_columnfamilies, v=4
DEBUG 05:51:00 Responding: ERROR INVALID: unconfigured table schema_usertypes, v=4
DEBUG 05:51:00 Responding: ERROR INVALID: unconfigured table schema_columns, v=4
DEBUG 05:51:00 Responding: ERROR INVALID: unconfigured table schema_functions, v=4
DEBUG 05:51:00 Responding: ERROR INVALID: unconfigured table schema_aggregates, v=4
DEBUG 05:51:00 Responding: ERROR INVALID: unconfigured table schema_triggers, v=4

对于使用未配置表解决此问题的任何帮助，将不胜感激。

Any help to solve this problem with unconfigured tables will be appreciated.

推荐答案

您是否可能使用驱动程序连接到Cassandra 3.0.0-alpha1？如果是这样，则需要运行通过此提交安装的驱动程序：

Are you possibly using the driver to connect to Cassandra 3.0.0-alpha1? If so, you'd need to be running the driver installed from this commit:

https://github.com/datastax/python-driver/tree/1a480f196ade42798596f5257d2cbeffcadf154f

或者：

• 如果您只是在进行实验，那么今天发布的驱动程序可以与所有Cassandra 1.2-2.2.0版一起使用



• DataStax已准备好与Cassandra 3.0.0-alpha1一起使用的3.0.0a1版本驱动程序，它将很快在pypi中提供。

按如下所示安装3.0.0 alpha版本的驱动程序：

install the 3.0.0 alpha version of the driver as follows:

pip install --pre cassandra-driver

pip install --pre cassandra-driver

pip install --pre --upgrade cassandra-driver

pip install --pre --upgrade cassandra-driver

这篇关于错误：无法连接到cassandra服务器。未配置表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！