创建键空间时出现 TTransportException答案

【问题标题】：TTransportException when creating keyspace创建键空间时出现 TTransportException
【发布时间】：2013-03-11 00:48:01
【问题描述】：

我正在使用cassandra-cli -h localhost 创建键空间。

我试过这个命令：create keyspace reddit with strategy_options = [{replication_factor:1}]; 和这个：create keyspace reddit with strategy_options = {replication_factor:1};，但我得到的只是这个：

org.apache.thrift.transport.TTransportException

我在 ArchLinux（由 AUR 构建）上尝试了 Cassandra 1.1.6 和 1.2.2。（我正在使用 systemctl start cassandra 运行 Cassandra）。

另外，当我尝试use reddit; 在创建键空间之前返回Keyspace 'reddit' not found.，但在尝试创建键空间后它返回Login failure. Did you specify 'keyspace', 'username' and 'password'?。

编辑：忘了提，但是create keyspace test; 工作得很好，但是当我使用replication_factor 创建键空间时，它会抛出异常。

【问题讨论】：

标签： nosql cassandra

【解决方案1】：

使用此查询解决：

create keyspace reddit with placement_strategy = 'org.apache.cassandra.locator.SimpleStrategy' and strategy_options = [{replication_factor:1}];

我是通过阅读 /var/log/cassandra/system.log 来到这里的：

CustomTThreadPoolServer.java (line 217) Error occurred during processing of message.
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at org.apache.cassandra.locator.AbstractReplicationStrategy.createReplicationStrategy(AbstractReplicationStrategy.java:230)
        at org.apache.cassandra.thrift.CassandraServer.system_add_keyspace(CassandraServer.java:1342)
        at org.apache.cassandra.thrift.Cassandra$Processor$system_add_keyspace.getResult(Cassandra.java:3960)
        at org.apache.cassandra.thrift.Cassandra$Processor$system_add_keyspace.getResult(Cassandra.java:3948)
        at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:32)
        at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:34)
        at org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:199)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
        at org.apache.cassandra.locator.AbstractReplicationStrategy.createReplicationStrategy(AbstractReplicationStrategy.java:226)
        ... 9 more
Caused by: org.apache.cassandra.exceptions.ConfigurationException: replication_factor is an option for SimpleStrategy, not NetworkTopologyStrategy
        at org.apache.cassandra.locator.NetworkTopologyStrategy.<init>(NetworkTopologyStrategy.java:66)
        ... 14 more

【讨论】：