问题描述
我在 OSX 上安装了 Cassandra.尝试从/bin/运行 cqlsh 时，出现以下错误:
I installed Cassandra on OSX.When trying to run cqlsh from /bin/, I get the following error:
> Connection error: ('Unable to connect to any servers', {'127.0.0.1':
> ConnectionShutdown('Connection <AsyncoreConnection(4522252560)
> 127.0.0.1:9160 (closed)> is already closed',)})
我在安装 Cassandra 时遇到了困难，我使用了 brew install cassandra，从 datastax 安装了 DSE，并从 Apache 下载了一个二进制文件.
I had difficulty installing Cassandra, and had used brew install cassandra, installed DSE from datastax, and downloaded a binary from Apache.
推荐答案
我认为问题是由于之前的安装没有正确卸载.我的用户 .cassandra 目录有一些默认配置，这肯定是针对不同版本的，并且阻止了 cqlsh 启动.
I think the issue was the result of having a previous installation that wasn't properly uninstalled. My user .cassandra directory had some default configs, that must have been for a different version, and prevented cqlsh from starting.
rm -Rf ~/.cassandra
之后，我可以正常运行 cqlsh.
After that, I could run cqlsh properly.
$ bin/cqlsh
Connected to Test Cluster at 127.0.0.1:9042.
[cqlsh 5.0.1 | Cassandra 2.1.2 | CQL spec 3.2.0 | Native protocol v3]
Use HELP for help.
cqlsh>
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