title: Unable to start cassandra with this errors
body: <p>When I run cassandra get these errors. What is the problem?</p>
  
  <pre><code>WARN  06:01:00 Unable to lock JVM memory (ENOMEM). This can result in part of the JVM being swapped out, especially with mmapped I/O enabled. Increase RLIMIT_MEMLOCK or run Cassandra as root.
  INFO  06:01:00 JMX is enabled to receive remote connections on port: 9909
  WARN  06:01:00 OpenJDK is not recommended. Please upgrade to the newest Oracle Java release
  INFO  06:01:00 Initializing SIGAR library
  WARN  06:01:00 Cassandra server running in degraded mode. Is swap disabled? : false,  Address space adequate? : true,  nofile limit adequate? : true, nproc limit adequate? : false 
  </code></pre>