Question

我已经安装了DataStax cassandra，它已在我的远程计算机上启动并运行。现在我尝试通过DataStax Devcenter连接，但它失败了。

在发布此问题之前，我已在此处阅读相同内容：DataStax Devcenter fails to connect to the remote cassandra database

我转到了cassandra.yaml conf文件，但start_native_transport: true选项不在我的文件中。我应该在哪里寻找它？我还将rpc_address更改为：0.0.0.0。

更新：

如果我将start_native_transport: true添加到我的cassandra.yaml中，它就会在Cassandra重新启动时崩溃。请参考下面的日志：

ERROR 17:48:32,626 Fatal configuration error error
Can't construct a java object for tag:yaml.org,2002:org.apache.cassandra.config.Config; exception=Cannot create property=start_native_transport for JavaBean=org.apache.cassandra.config.Config@ef28a30; Unable to find property 'start_native_transport' on class: org.apache.cassandra.config.Config
 in "<reader>", line 10, column 1:
    cluster_name: 'Test Cluster'
    ^

        at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:372)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:177)
        at org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:136)
        at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:122)
        at org.yaml.snakeyaml.Loader.load(Loader.java:52)
        at org.yaml.snakeyaml.Yaml.load(Yaml.java:166)
        at org.apache.cassandra.config.DatabaseDescriptor.loadYaml(DatabaseDescriptor.java:141)
        at org.apache.cassandra.config.DatabaseDescriptor.<clinit>(DatabaseDescriptor.java:116)
        at org.apache.cassandra.service.AbstractCassandraDaemon.setup(AbstractCassandraDaemon.java:124)
        at org.apache.cassandra.service.AbstractCassandraDaemon.activate(AbstractCassandraDaemon.java:389)
        at org.apache.cassandra.thrift.CassandraDaemon.main(CassandraDaemon.java:107)
Caused by: org.yaml.snakeyaml.error.YAMLException: Cannot create property=start_native_transport for JavaBean=org.apache.cassandra.config.Config@ef28a30; Unable to find property 'start_native_transport' on class: org.apache.cassandra.config.Config
        at org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.constructJavaBean2ndStep(Constructor.java:305)
        at org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.construct(Constructor.java:184)
        at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:370)
        ... 10 more
Caused by: org.yaml.snakeyaml.error.YAMLException: Unable to find property 'start_native_transport' on class: org.apache.cassandra.config.Config
        at org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.getProperty(Constructor.java:342)
        at org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.constructJavaBean2ndStep(Constructor.java:240)
        ... 12 more
null; Can't construct a java object for tag:yaml.org,2002:org.apache.cassandra.config.Config; exception=Cannot create property=start_native_transport for JavaBean=org.apache.cassandra.config.Config@ef28a30; Unable to find property 'start_native_transport' on class: org.apache.cassandra.config.Config
Invalid yaml; unable to start server.  See log for stacktrace.

感谢您的帮助！

Answer 1

start_native_transport: true

应该在cassandra.yaml中，如果它不存在那么你应该将它添加到cassandra.yaml并在重新启动Cassandra服务器后尝试

Answer 2

您使用的是什么版本的Cassandra？ DevCenter支持Cassandra版本＆gt; = 1.2
如果您仍然看到cassandra.yaml中的更改错误，您可以发布指向Gist的链接。但YAML格式非常简单，所以我想你会弄清楚。
如果您阅读了我的previous answer，您会发现需要将rpc_address设置为不同值，而不是0.0.0.0 。无论如何，最新版本的DevCenter（1.1.1）即使集群中的所有节点都将rpc_address设置为0.0.0.0也是可行的（作为旁注，我不会认为＆＃39;通常是一个很好的环境。）

Answer 3

DevCenter.ini没有java VM信息。添加以下VM信息有助于解决连接问题。

-vm
C:\Program Files (x86)\JDK64\1.8.0.74\jre\bin\java.exe

注意：上面的行表示来自JRE版本的适当的java.exe

DataStax Devcenter无法连接到远程cassandra db

3 个答案: