PYSPARK not working

Hi
I am getting below error while launching pyspark. Pease lookinto this asap.

error: [Errno 111] Connection refused
ERROR:py4j.java_gateway:An error occurred while trying to connect to the Java server
Traceback (most recent call last):
File “/usr/hdp/2.5.0.0-1245/spark/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py”, line 690, in start
self.socket.connect((self.address, self.port))
File “/usr/lib64/python2.7/socket.py”, line 224, in meth
return getattr(self._sock,name)(*args)
error: [Errno 111] Connection refused
Traceback (most recent call last):
File “/usr/hdp/2.5.0.0-1245/spark/python/pyspark/shell.py”, line 43, in
sc = SparkContext(pyFiles=add_files)
File “/usr/hdp/2.5.0.0-1245/spark/python/pyspark/context.py”, line 115, in init
conf, jsc, profiler_cls)
File “/usr/hdp/2.5.0.0-1245/spark/python/pyspark/context.py”, line 172, in _do_init
self._jsc = jsc or self._initialize_context(self._conf._jconf)
File “/usr/hdp/2.5.0.0-1245/spark/python/pyspark/context.py”, line 235, in _initialize_context
return self._jvm.JavaSparkContext(jconf)
File “/usr/hdp/2.5.0.0-1245/spark/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py”, line 1062, in call
File “/usr/hdp/2.5.0.0-1245/spark/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py”, line 631, in send_command
File “/usr/hdp/2.5.0.0-1245/spark/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py”, line 624, in send_command
File “/usr/hdp/2.5.0.0-1245/spark/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py”, line 579, in _get_connection
File “/usr/hdp/2.5.0.0-1245/spark/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py”, line 585, in _create_connection
File “/usr/hdp/2.5.0.0-1245/spark/python/lib/py4j-0.9-src.zip/py4j/java_gateway.py”, line 697, in start
py4j.protocol.Py4JNetworkError: An error occurred while trying to connect to the Java server

Where are you getting this issue? Lab or in your environment?