我昨天正常使用Cassandra，但是在安装maven并重新启动计算机后，启动CQLSH时出现此错误消息：
Connection error: ('Unable to connect to any servers', {'127.0.0.1': error(111, "Tried connecting to [('127.0.0.1', 9042)]. Last error: Connection refused")})
并且在启动此命令行时：
sudo cassandra -R
我有此错误消息：
Exception (org.apache.cassandra.exceptions.ConfigurationException) encountered during startup: Expecting URI in variable: [cassandra.config]. Found[cassandra.yaml]. Please prefix the file with [file:///] for local files and [file://<server>/] for remote files. If you are executing this from an external tool, it needs to set Config.setClientMode(true) to avoid loading configuration.
org.apache.cassandra.exceptions.ConfigurationException: Expecting URI in variable: [cassandra.config]. Found[cassandra.yaml]. Please prefix the file with [file:///] for local files and [file://<server>/] for remote files. If you are executing this from an external tool, it needs to set Config.setClientMode(true) to avoid loading configuration.
at org.apache.cassandra.config.YamlConfigurationLoader.getStorageConfigURL(YamlConfigurationLoader.java:80)
at org.apache.cassandra.config.YamlConfigurationLoader.loadConfig(YamlConfigurationLoader.java:100)
at org.apache.cassandra.config.DatabaseDescriptor.loadConfig(DatabaseDescriptor.java:268)
at org.apache.cassandra.config.DatabaseDescriptor.daemonInitialization(DatabaseDescriptor.java:147)
at org.apache.cassandra.config.DatabaseDescriptor.daemonInitialization(DatabaseDescriptor.java:132)
at org.apache.cassandra.service.CassandraDaemon.applyConfig(CassandraDaemon.java:665)
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:609)
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:732)
22:28:18.449 [main] ERROR o.a.c.service.CassandraDaemon - Exception encountered during startup
org.apache.cassandra.exceptions.ConfigurationException: Expecting URI in variable: [cassandra.config]. Found[cassandra.yaml]. Please prefix the file with [file:///] for local files and [file://<server>/] for remote files. If you are executing this from an external tool, it needs to set Config.setClientMode(true) to avoid loading configuration.
at org.apache.cassandra.config.YamlConfigurationLoader.getStorageConfigURL(YamlConfigurationLoader.java:80) ~[apache-cassandra-3.11.4.jar:3.11.4]
at org.apache.cassandra.config.YamlConfigurationLoader.loadConfig(YamlConfigurationLoader.java:100) ~[apache-cassandra-3.11.4.jar:3.11.4]
at org.apache.cassandra.config.DatabaseDescriptor.loadConfig(DatabaseDescriptor.java:268) ~[apache-cassandra-3.11.4.jar:3.11.4]
at org.apache.cassandra.config.DatabaseDescriptor.daemonInitialization(DatabaseDescriptor.java:147) ~[apache-cassandra-3.11.4.jar:3.11.4]
at org.apache.cassandra.config.DatabaseDescriptor.daemonInitialization(DatabaseDescriptor.java:132) ~[apache-cassandra-3.11.4.jar:3.11.4]
at org.apache.cassandra.service.CassandraDaemon.applyConfig(CassandraDaemon.java:665) [apache-cassandra-3.11.4.jar:3.11.4]
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:609) [apache-cassandra-3.11.4.jar:3.11.4]
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:732) [apache-cassandra-3.11.4.jar:3.11.4]
请问卡桑德拉怎么了？
我什至卸载了它，然后重新安装也没有成功。
[我怀疑Maven安装了另一个Java版本或其他东西……希望您能在这种情况下提供帮助。
Cassandra Version: 3.11.4
Java version:
openjdk version "1.8.0_222"
OpenJDK Runtime Environment (build 1.8.0_222-8u222-b10-1ubuntu1~16.04.1-b10)
OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)
OS:
Ubuntu 16.04
/ etc / cassandra / jvm.options