Stop interrupting your server, and read the log;
You see where it says "database was not shut down normally!" and "Starting crash recovery."
It's trying to recover from a crash or an improper shutdown. Go further back in the log and you may see the original incident, but for now, the answer is to stop interrupting it and let it recover.
Once that happens, it will tell you, via the log, when it is ready to start accepting connections again... or if it's unable to recover, the log will tell you that crash recovery has failed, in no uncertain terms.
Don't use kill -9
unless you (a) really know what you are doing and (b) are prepared for further data corruption. That's a very heavy-handed approach and should not be used lightly, particularly when the server has already told you exactly what's going on.
http://dev.mysql.com/doc/refman/5.6/en/innodb-recovery.html