[webhdfs] When Getting the file using OP=OPEN with DN http address, ESTABLISHED sockets are growing.

As part of the reliable test,
Scenario:
Initially check the socket count. ---there are aroud 42 sockets are there.
open the file with DataNode http address using op=OPEN request parameter about 500 times in loop.
Wait for some time and check the socket count. — There are thousands of ESTABLISHED sockets are growing. ~2052

Here is the netstat result:

C:\Users\uma>netstat | grep 127.0.0.1 | grep ESTABLISHED |wc -l
2042
C:\Users\uma>netstat | grep 127.0.0.1 | grep ESTABLISHED |wc -l
2042
C:\Users\uma>netstat | grep 127.0.0.1 | grep ESTABLISHED |wc -l
2042
C:\Users\uma>netstat | grep 127.0.0.1 | grep ESTABLISHED |wc -l
2042
C:\Users\uma>netstat | grep 127.0.0.1 | grep ESTABLISHED |wc -l
2042
C:\Users\uma>netstat | grep 127.0.0.1 | grep ESTABLISHED |wc -l
2042
C:\Users\uma>netstat | grep 127.0.0.1 | grep ESTABLISHED |wc -l
2042
C:\Users\uma>netstat | grep 127.0.0.1 | grep ESTABLISHED |wc -l
2042
C:\Users\uma>netstat | grep 127.0.0.1 | grep ESTABLISHED |wc -l
2042

This count is not coming down.