我使用 Cassandra 2.1.13作为 C* 实际启动时某些执行的一部分，当 C* 启动过程未完成时，在此操作的中间，计算机重新启动。奇怪的是，C*配置文件cassandra.yaml在稍后检查时被清空，并出现以下异常。
是因为清空的 conf 文件 cassandra.yaml 没有内容还是以下异常导致清空 cassandra.yaml 文件？
ERROR [main] DatabaseDescriptor.java:147 - Fatal error during configuration loading
java.lang.NullPointerException: null
at java.util.TreeMap.putAll(TreeMap.java:313) ~[na:1.8.0_172]
at java.util.TreeMap.<init>(TreeMap.java:185) ~[na:1.8.0_172]
at org.apache.cassandra.config.YamlConfigurationLoader.logConfig(YamlConfigurationLoader.java:126) ~[apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.config.YamlConfigurationLoader.loadConfig(YamlConfigurationLoader.java:104) ~[apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.config.YamlConfigurationLoader.loadConfig(YamlConfigurationLoader.java:84) ~[apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.config.DatabaseDescriptor.loadConfig(DatabaseDescriptor.java:161) ~[apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.config.DatabaseDescriptor.<clinit>(DatabaseDescriptor.java:136) ~[apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:168) [apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:564) [apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:653) [apache-cassandra-2.1.13.jar:2.1.13]
ERROR [main] CassandraDaemon.java:581 - Exception encountered during startup
java.lang.ExceptionInInitializerError: null
at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:168) [apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:564) [apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:653) [apache-cassandra-2.1.13.jar:2.1.13]
Caused by: java.lang.NullPointerException: null
at org.apache.cassandra.config.DatabaseDescriptor.getDiskFailurePolicy(DatabaseDescriptor.java:1347) ~[apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.utils.JVMStabilityInspector.inspectThrowable(JVMStabilityInspector.java:58) ~[apache-cassandra-2.1.13.jar:2.1.13]
at org.apache.cassandra.config.DatabaseDescriptor.<clinit>(DatabaseDescriptor.java:149) ~[apache-cassandra-2.1.13.jar:2.1.13]
... 3 common frames omitted
任何人都可以帮助我找到此问题的根本原因吗？如果您需要更多详细信息，请告诉我。
谢谢！
您是否从未从标准配置文件验证过 cassandra.yaml filr，没有任何更改？ 似乎有一些语法错误。