java.lang.OutOfMemoryError：jasper报告中的Java堆空间 [英] java.lang.OutOfMemoryError: Java heap space in jasper report

问题描述

当我以doc格式导出内容时，我得到java堆空间错误，

When i export content in doc format then i get java heap space error,

java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOf(Unknown Source)
    at java.io.ByteArrayOutputStream.write(Unknown Source)
    at sun.nio.cs.StreamEncoder.writeBytes(Unknown Source)
    at sun.nio.cs.StreamEncoder.implWrite(Unknown Source)
    at sun.nio.cs.StreamEncoder.write(Unknown Source)
    at sun.nio.cs.StreamEncoder.write(Unknown Source)
    at java.io.OutputStreamWriter.write(Unknown Source)
    at java.io.Writer.write(Unknown Source)

推荐答案

最佳添加

-XX:+HeapDumpOnOutOfMemoryError

每当发生OutOfMemoryError时创建heapdump，然后分析堆转储例如 Eclipse Memory Analyzer ，它将显示对象的数量，通常可以清楚地识别导致OutOfMemory错误的对象。

to create heapdump whenever an OutOfMemoryError occurrs, and then analyse the heap dump with e.g. Eclipse Memory Analyzer which will show you the amount of objects and usually clearly identifies the objects causing the OutOfMemory Error.

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