Question

我正在尝试解析html模板并使用itex库将其转换为pdf。它在staging和qa中正常工作但在生产中丢失了内存错误.Below是示例代码。

 String template = null;
  Document document = null;
  HTMLWorker htmlWorker;
  OutputStream outputStream = null;
  document = new Document();
  document.open();
  document.addTitle("SeatSeller Agent Invoice");
  document.addHeader("Content-Disposition", "attachment");
  document.addHeader("name", "redbusTicket");
  document.addHeader("filename", "test.pdf");
  document.addHeader("Content-Type", "application/pdf");
  document.addHeader("Content-ID", "test.pdf");
  document.addHeader("Content-Description", "SeatSellerInvoice.pdf");
  htmlWorker = new HTMLWorker(document);
  Handlebars handlebars = new Handlebars();
  String filePath = null;

    template = handlebars.compile("invoicepdftemplate").apply(creditInvoice);
    filePath = creditInvoice.getAccount().toString() + "_"
        + MMM_FORMATTER.format(creditInvoice.getDate())
        + YYYY_FORMATTER.format(creditInvoice.getDate()) + ".pdf";


  htmlWorker.parse(new StringReader(template));

  document.close();

  outputStream = new FileOutputStream(filePath);

  ITextRenderer iTextRenderer = new ITextRenderer();
  iTextRenderer.setDocumentFromString(template);
  iTextRenderer.layout();
  iTextRenderer.createPDF(outputStream);
  File fileToBeUploaded = new File(filePath);

下面是错误的堆栈跟踪 - ：

java.lang.OutOfMemoryError: Java heap space
    at com.lowagie.text.pdf.codec.PngImage.decodeIdat(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.pdf.codec.PngImage.getImage(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.pdf.codec.PngImage.getImage(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.pdf.codec.PngImage.getImage(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.Image.getInstance(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.Image.getInstance(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.html.simpleparser.HTMLWorker.startElement(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.xml.simpleparser.SimpleXMLParser.processTag(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.xml.simpleparser.SimpleXMLParser.go(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.xml.simpleparser.SimpleXMLParser.parse(Unknown Source) ~[itext-2.1.7.jar:na]
    at com.lowagie.text.html.simpleparser.HTMLWorker.parse(Unknown Source) ~[itext-2.1.7.jar:na]

是否存在任何内存泄漏或代码中的任何问题。生产机器内存为Xms-256 Xmx-365。任何人都可以帮忙

Answer 1

问题是我在我的html模板中使用了400KB大小的图像，并且生产机器的内存非常少。因此，在解析html文件时，它会丢失内存错误。

Answer 2

outputStream = new FileOutputStream（filePath）; 这里： - 你的代码中没有关闭outputStream。请检查一次或尝试使用资源。

https://docs.oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html

通过itext生成pdf时内存堆空间不足

2 个答案: