odluser@sai-odlcontroller:~/l2switch/distribution/karaf/target/assembly/bin$ ./karaf debug
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0
Listening for transport dt_socket at address: 5005

________ ________ .__ .__ .__ __
_____ \ ______ ____ ____ ______ \ _____ __..| | || ____ | |_/ |
/ |
____ _/ __ \ / \ | |
__ \< | || | | |/ ___| | \ __\
/ | \ |> > ___/| | | ` \/ __
___ || || / /_/ > Y \ |
_______ / _/ __ >__| /______ (____ / ___||__/__ /|__| /_|
\/|_| \/ \/ \/ \/\/ /____/ \/

Hit '<tab>' for a list of available commands
and '[cmd] --help' for help on a specific command.
Hit '<ctrl-d>' or type 'system:shutdown' or 'logout' to shutdown OpenDaylight.

opendaylight-user@root>log:tail
Error executing command: java.lang.NullPointerException
(reverse-i-search)`ui': ^C
opendaylight-user@root>feature:list
Error executing command: java.lang.NullPointerException
opendaylight-user@root>