I have problems starting Cassandra. The follow is my terminal output when I try to issue a start command:
root@gestion:~# cassandra -f
Exception in
See https://issues.apache.org/jira/browse/CASSANDRA-2383 for some discussion of the log4j initialization.
"Couldn't figure out log4j configuration" means that Cassandra couldn't convert your -Dlog4j.configuration property to a valid log4j config filename. It doesn't mean there's an error in the log4j config file itself.