java - Android - HttpUrlConnection is not closing. Eventually results to SocketException

Question

I am encountering some problems with the HttpUrlConnection in devices running Jellybean (4.1 - 4.3) wherein connections are not closed and results to a SocketException "Too many open files" after executing a number of times.

I do call HttpUrlConnection.disconnect() and am closing all the Inputstream, Outputstream, Reader and Writers in a finally block.

Going to adb shell and executing a netstat shows all the connections created by the application are left in CLOSE_WAIT state.

InputStream inputStream = httpUrlConnection.getInputStream();

// After calling inputStream.read() then the problem occurs. I think the 
// inputstream doesn't get closed even after calling close in a finally block. 
// The InputStream is a ChunkedInputStream if that helps.

I have tried other devices running on 2.3.3, 4.0.3 and 4.4 and did not encounter this issue.

Is there another way that I can manually close the connections?

Answer 1

I finally found a workaround. It seems that Jellybean is having an issue on "Keep-Alive" connections. I just added Connection=Close to my request header and now all is working. Doing a netstat, I see that the connections are now being closed and I no longer get the SocketException due to "Too many open files".