This error is caused by a failed previous installation and the data_file_directories, commitlog_directories and saved_caches_directories are not deleted.
INFO 22:05:47 Initializing system.schema_functions INFO 22:05:47 Initializing system.schema_aggregates INFO 22:05:47 Not submitting build tasks for views in keyspace system as storage service is not initialized ERROR 22:05:48 Cannot start node if snitch's data center (dc1) differs from previous data center (datacenter1). Please fix the snitch configuration, decommission and rebootstrap this node or use the flag -Dcassandra.ignore_dc=true. [bigdata@orcl1 bin]$
[bigdata@orcl1 cassandra]$ ls commitlog data saved_caches [bigdata@orcl1 cassandra]$ cd commitlog/ [bigdata@orcl1 commitlog]$ ls CommitLog-6-1469829020867.log CommitLog-6-1469829020868.log CommitLog-6-1469829947469.log [bigdata@orcl1 commitlog]$ rm * [bigdata@orcl1 commitlog]$ cd ../data/ [bigdata@orcl1 data]$ ls system system_auth system_distributed system_schema system_traces [bigdata@orcl1 data]$ rm * rm: cannot remove `system': Is a directory rm: cannot remove `system_auth': Is a directory rm: cannot remove `system_distributed': Is a directory rm: cannot remove `system_schema': Is a directory rm: cannot remove `system_traces': Is a directory [bigdata@orcl1 data]$ rm -rf * [bigdata@orcl1 data]$ cd .. [bigdata@orcl1 cassandra]$ ls commitlog data saved_caches [bigdata@orcl1 cassandra]$ cd saved_caches/ [bigdata@orcl1 saved_caches]$ ls [bigdata@orcl1 saved_caches]$ cd ..
