title: Restart instance cassandra - commitlog, saved cache warnings?
body: <p>I'm seeing these messages on node restart.  What do they mean?</p>
  
  <pre><code>INFO  [main] 2019-08-01 23:21:16,645 ViewManager.java:137 - Not submitting build tasks for views in keyspace system_traces as storage service is not initialized
  INFO  [pool-3-thread-1] 2019-08-01 23:21:16,646 AutoSavingCache.java:198 - reading saved cache apache-cassandra-3.11.3/bin/../data/saved_caches/KeyCache-e.db
  INFO  [pool-3-thread-1] 2019-08-01 23:21:16,678 AutoSavingCache.java:263 - Harmless error reading saved cache /home/cassadmin/apache-cassandra-3.11.3/bin/../data/saved_caches/KeyCache-e.db
  INFO  [pool-3-thread-1] 2019-08-01 23:21:16,679 AutoSavingCache.java:174 - Completed loading (33 ms; 41 keys) KeyCache cache
  INFO  [main] 2019-08-01 23:21:16,706 CommitLogReader.java:105 - Skipping playback of empty log: CommitLog-6-1557227264256.log
  INFO  [main] 2019-08-01 23:21:17,360 CommitLog.java:159 - Log replay complete, 12 replayed mutations –
  INFO  [main] 2019-08-01 23:21:17,364 StorageService.java:600 - Populating token metadata from system tables
  
  </code></pre>