解决Nexus3.xx版本的内存问题(1核1G内存不行，内存必须得2G，亲测有效)

墨蓝 2022-02-24 09:00 1389阅读 0赞

## 解决Nexus3.xx版本的内存问题 ##

> 楼主买了个1核1G的云服务器，准备搭建一个私服用一用，谁知竟然启动报错。

查看运行状态  
说的很清楚，说我的内存不足。

ubuntu@10-9-17-59:~/Develop/Nexus/nexus-3.15.2-01/bin$ ./nexus status
    Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00007f046d000000, 2555904, 1) failed; error='Cannot allocate memory' (errno=12)
    #
    # There is insufficient memory for the Java Runtime Environment to continue.
    # Native memory allocation (mmap) failed to map 2555904 bytes for committing reserved memory.
    # An error report file with more information is saved as:
    # /home/ubuntu/Develop/Nexus/nexus-3.15.2-01/hs_err_pid1819.log

### 一、解决办法 ###

#### 1.查看怎么修改 ####

修改Nexus 的内存配置

[Nexus官方给出的修改方案][Nexus]

![修改运行内存][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70]

#### 2.找到目标文件 ####

ubuntu@10-9-17-59:~/Develop/Nexus/nexus-3.15.2-01/bin$ ls
    contrib  nexus  nexus.rc  nexus.vmoptions
    ubuntu@10-9-17-59:~/Develop/Nexus/nexus-3.15.2-01/bin$

![目标文件][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70 1]

#### 3.编辑它 ####

-Xms128M
    -Xmx128M
    -XX:MaxDirectMemorySize=256M

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70 2]

#### 4.启动 ####

经过测试1核1G是启动成功不了的，纵使修改了，也没办法，必须得2G内存。

报错：

2019-04-03 16:45:53,865+0800 WARN  [jetty-main-1] *SYSTEM org.eclipse.jetty.webapp.WebAppContext - Failed startup of context o.e.j.w.WebAppContext@56eef120{Sonatype Nexus,/,file:///home/ubuntu/Develop/Nexus/nexus-3.15.2-01/public/,UNAVAILABLE}
    java.lang.OutOfMemoryError: Java heap space
    	at org.apache.felix.resolver.util.CandidateSelector.copy(CandidateSelector.java:45)
    	at org.apache.felix.resolver.util.OpenHashMapList.deepClone(OpenHashMapList.java:39)
    	at org.apache.felix.resolver.Candidates.copy(Candidates.java:1143)
    	at org.apache.felix.resolver.Candidates.permutate(Candidates.java:1196)
    	at org.apache.felix.resolver.ResolverImpl$ResolveSession.permutateIfNeeded(ResolverImpl.java:134)
    	at org.apache.felix.resolver.Candidates.checkSubstitutes(Candidates.java:344)
    	at org.apache.felix.resolver.ResolverImpl.checkConsistency(ResolverImpl.java:562)
    	at org.apache.felix.resolver.ResolverImpl.findValidCandidates(ResolverImpl.java:530)
    	at org.apache.felix.resolver.ResolverImpl.doResolve(ResolverImpl.java:393)
    	at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:375)
    	at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:368)
    	at org.apache.karaf.features.internal.region.SubsystemResolver.resolve(SubsystemResolver.java:216)
    	at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:263)
    	at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1176)
    	at org.apache.karaf.features.internal.service.FeaturesServiceImpl$1.call(FeaturesServiceImpl.java:1074)
    	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    	at java.lang.Thread.run(Thread.java:748)

### 2核2G完美运行 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70 3]

访问它：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70 4]

[Nexus]: https://help.sonatype.com/repomanager3/installation/configuring-the-runtime-environment
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70]: /images/20220224/9c6c09dbd66f4d6f95efd5710d0b4224.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70 1]: /images/20220224/6517f5a16619421890f99717df784853.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70 2]: /images/20220224/e46750101c8a44da9bf15d5f00f38554.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70 3]: /images/20220224/3673d58cf7c342aab979b3cb3bb6e42f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dkMjAxNDYxMA_size_16_color_FFFFFF_t_70 4]: /images/20220224/abba1e364ae34e66bd44c8c35fac1dc9.png