If using the FileSystem API directly, is there any side effect i the
FileSystem instances (normally HDFS ones) are not being closed? Like
open sockets, open file handles, memory leaks, etc.
I'm using it from continuously running applications (webapps) so I
want to ensure I won't have any issue.
Normal usage pattern is getting a FileSystem instance using a JobConf,
doing something and then dropping the FS instance.