---
title: 方案实现
description: "| 项目 | 版本 |"
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---
# 方案实现

#### 软件版本

| 项目 | 版本 |
| --- | --- |
| Hadoop | apache hadoop\-2.7.2 |


#### 代码实现

实现该功能，需修改Hadoop源码中的FSDownload.java文件。

FSDownload.java原始代码请参见获取链接(https://github.com/apache/hadoop/blob/rel/release-3.2.0/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/FSDownload.java)。


1. 修改“hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/FSDownload.java”文件，新增aarch64PyMix(File dst)方法，该方法实现在Arm平台上将解压文件改名。
  1 2 3 4 5 6 7 8 9 10 11 12 13 private void aarch64PyMix(File dst) { String dstPath = dst.getAbsolutePath(); String fileFullName = dst.getName(); String fileName = fileFullName.substring(0,fileFullName.length() - 4); String orgDirName = dstPath + File.separator + fileName; String aarch64DirName = dstPath + File.separator + fileName + "_aarch64"; File orgFile = new File(orgDirName); File aarch64File = new File(aarch64DirName); if (orgFile.exists() && aarch64File.exists() && "aarch64".equals(System.getProperty("os.arch"))) { orgFile.renameTo(new File(orgDirName + "_bak")); aarch64File.renameTo(new File(orgDirName)); } }

2. 在“hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/FSDownload.java”文件中，zip在unpack方法中的ARCHIVE条件下解压后，并增加对aarch64PyMix方法的调用，如以下加粗内容所示。

```
case ARCHIVE:
} else if (lowerDst.endsWith(".zip")) {
FileUtil.unZip(localrsrc, dst);
aarch64PyMix(dst);
} else if (lowerDst.endsWith(".tar.gz")) ||
```