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Posted to issues@commons.apache.org by "wangrubao (JIRA)" <ji...@apache.org> on 2019/08/13 02:15:00 UTC

[jira] [Comment Edited] (LANG-1472) SystemUtils.getHostName()获取系统hostname为null

    [ https://issues.apache.org/jira/browse/LANG-1472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16905730#comment-16905730 ] 

wangrubao edited comment on LANG-1472 at 8/13/19 2:14 AM:
----------------------------------------------------------

*operating system* :
 LSB Version: core-9.20160110ubuntu0.2-amd64:core-9.20160110ubuntu0.2-noarch:security-9.20160110ubuntu0.2-amd64:security-9.20160110ubuntu0.2-noarch
 Distributor ID: Ubuntu
 Description: Ubuntu 16.04.4 LTS
 Release: 16.04
 Codename: xenial

*java* : 

java version "1.8.0_191"
 Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
 Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)

*mysql* : 

mysql Ver 14.14 Distrib 5.7.24, for Linux (x86_64) using EditLine wrapper

*maven* : 

apache-maven-3.6.1\


was (Author: violetkiss):
*operating system* :
LSB Version: core-9.20160110ubuntu0.2-amd64:core-9.20160110ubuntu0.2-noarch:security-9.20160110ubuntu0.2-amd64:security-9.20160110ubuntu0.2-noarch
Distributor ID: Ubuntu
Description: Ubuntu 16.04.4 LTS
Release: 16.04
Codename: xenial

*java* : 

java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)

*mysql* : 

mysql Ver 14.14 Distrib 5.7.24, for Linux (x86_64) using EditLine wrapper

 

> SystemUtils.getHostName()获取系统hostname为null
> ------------------------------------------
>
>                 Key: LANG-1472
>                 URL: https://issues.apache.org/jira/browse/LANG-1472
>             Project: Commons Lang
>          Issue Type: Bug
>          Components: lang.*
>    Affects Versions: 3.9
>         Environment: * 操作系统：阿里云提供的Ubuntu 16.04
> root@iZwz99ibpdra8w3j3jcbw7Z:~# hostname
> iZwz99ibpdra8w3j3jcbw7Z
> root@iZwz99ibpdra8w3j3jcbw7Z:~# echo $HOSTNAME
> iZwz99ibpdra8w3j3jcbw7Z
>  * 语言：Java 8
> root@iZwz99ibpdra8w3j3jcbw7Z:~# java -version
> java version "1.8.0_191"
> Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
> Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)
>            Reporter: wangrubao
>            Priority: Critical
>         Attachments: SnowflakeIdWorker.java, error.png, pom.xml
>
>
> SpringBoot 项目获取系统 hostname 为 null 导致 java.lang.NullPointerException 。
> 部分代码：
>    private static Long getDataCenterId(){
>         int[] ints = StringUtils.toCodePoints(SystemUtils.getHostName());
>         int sums = 0;
>         for (int i: ints) {
>             sums += i;
>         }
>         return (long)(sums % 32);
>     }



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