错误：在解析块映射时；预期<block end>，但在cassandra.yaml文件中找到BlockMappingStart

Question

我正在尝试在cento7 VPS服务器上执行Cassandra。但是，当我使用systemctl start cassandra命令行启动Cassandra时，日志中出现以下错误：

INFO  [main] 2020-07-03 12:45:23,116 YamlConfigurationLoader.java:89 - Configuration location: file:/etc/cassandra/default.conf/cassandra.yaml
ERROR [main] 2020-07-03 12:45:23,211 CassandraDaemon.java:774 - Exception encountered during startup: Invalid yaml: file:/etc/cassandra/default.conf/cassandra.yaml
 Error: while parsing a block mapping; expected <block end>, but found BlockMappingStart;  in 'reader', line 708, column 2:
     broadcast_rpc_address: 127.0.0.1
     ^

cassandra.yaml截图