JSP Tag Pooling Memory Leak

public class AverageFileSize extends SimpleTagSupport {

    private boolean humanReadable;
    private List<AttachedFile> fileList;

    public AverageFileSize(List<AttachedFile> fileList) {
        this.humanReadable = false;
        this.fileList = fileList;
    }

    public AverageFileSize(boolean humanReadable, List<AttachedFile> fileList) {
        this.humanReadable = humanReadable;
        this.fileList = fileList;
    }

    @Override
    public void doTag() throws JspException, IOException {

        long fileSizeAvg = 0;
        for (AttachedFile f : fileList) {
            fileSizeAvg += f.getSize();
        }

        fileSizeAvg /= fileList.size();

        try {
            String fileSize = humanReadable ? getPrettyFileSize(fileSizeAvg) : Long.toString(fileSizeAvg) + "B";
            getJspContext().getOut().write(fileSize);
        } catch (IOException e) {
            throw new SkipPageException(e);
        }
    }

    private String getPrettyFileSize(long sizeInBytes) {
        String prettyFileSize = "";

        /**
         * Logic for formatting to human readable
         */

        return prettyFileSize;
    }
}