centos 8 下面安装hadoop 2.7.4 编译时失败！An Ant BuildException has occured: exec returned: 2
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7:run (make) on project hadoop-common: An Ant BuildException has occured: exec returned: 2
[ERROR] around Ant part ...... @ 7:124 in /opt/hadoop-2.7.4-src/hadoop-common-project/hadoop-common/target/antrun/build-main.xml
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] Apache Software Foundation
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn -rf :hadoop-common
可参考：
“【绝对有效，从头开始自己一步一步测试的】CentOs 8.0 下安装Hadoop环境搭建”
【绝对有效，从头开始自己一步一步测试的】CentOs 8.0 下安装Hadoop环境搭建_一扣解千愁的博客-CSDN博客 CentOs 8.0 下安装Hadoop 在Linux系统下安装Hadoop环境具体流程：1. 首先安装java jdk1.8有两种方法： 安装Oracle的jdk（相对复杂）； 安装OpenJDK（相对简单，我安装的是这种）; 这两种jdk的区别，给个链接大家去看 https://www.php.cn/java-article-415831.... https://blog.csdn.net/qq_37344125/article/details/102838087
如有帮助，望及时采纳
