alibaba/easyexcel

根据原文件作为模板写入数据生成新的文件占用内存很大OOM

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#3,858 opened on Jul 1, 2024

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Description

建议先去看文档

快速开始 、常见问题

异常代码

   ExcelWriter excelWriter = EasyExcel.write(outputStream).withTemplate(byteArrayInputStream).build();

异常提示

java.lang.OutOfMemoryError: Java heap space Wrapped by: com.alibaba.excel.exception.ExcelGenerateException: java.lang.OutOfMemoryError: Java heap space at com.alibaba.excel.write.ExcelBuilderImpl.(ExcelBuilderImpl.java:41) at com.alibaba.excel.ExcelWriter.(ExcelWriter.java:47) at com.alibaba.excel.write.builder.ExcelWriterBuilder.build(ExcelWriterBuilder.java:130)

"org.apache.poi.xssf.usermodel.XSSFWorkbook", loaded by "org.springframework.boot.loader.LaunchedURLClassLoader@0xe0000000", which occupies 702,261,008 (83.36%) bytes.

问题描述

Contributor guide

Research direction
Investigate the withTemplate method in EasyExcel to understand how the template is loaded into memory. Look for ways to stream the template or use lazy loading to reduce memory usage.
Tech stack
java
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Java
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70