It shows below error when run command to access tweets .Actually it is working fine for me couple of days ago now its creates such errors kindly me to get rid that situation… 
2016-05-10 19:38:09,638 (Twitter Stream consumer-1[Establishing
connection]) [DEBUG -
twitter4j.internal.logging.SLF4JLogger.debug(SLF4JLogger.java:67)]
connection: close
2016-05-10 19:38:09,640 (Twitter Stream
consumer-1[Establishing connection]) [DEBUG -
twitter4j.internal.logging.SLF4JLogger.debug(SLF4JLogger.java:67)]
Unknown URL. See Twitter Streaming API documentation at http://dev.twitter.com/pages/streaming_api
2016-05-10
19:41:11,961 (Twitter Stream consumer-1[Establishing connection]) [INFO