code: public void deleteChannel(FileIOChannel.ID channel) throws IOException {
  		if (channel != null) {
  			if (channel.getPathFile().exists() && !channel.getPathFile().delete()) {
  				LOG.warn("IOManager failed to delete temporary file {}", channel.getPath());
  			}
  		}
  	}
docs: Deletes the file underlying the given channel. If the channel is still open, this
  call may fail.
  
  @param channel The channel to be deleted.
  @throws IOException Thrown if the deletion fails.