presto-hive/src/main/java/io/prestosql/plugin/hive/s3/PrestoS3FileSystem.java/PrestoS3InputStream/closeStream
class PrestoS3InputStream:        private void closeStream()
        {
            if (in != null) {
                abortStream(in);
                in = null;
                STATS.connectionReleased();
            }
        }