问题叙述性说明
通过运行“mvn clean deploy” 命令 将 Maven 项目公布 Nexus 当PW。举例控制台输出以下警告消息：
[INFO] Downloaded: dav:http://maven.mysite.com/content/repositories/snapshots/${groupId}/${artifactId}/${version}/maven-metadata.xml (2 KB at 10.5 KB/sec)
[INFO] Uploading: http://maven.mysite.com/content/repositories/snapshots/${groupId}/${artifactId}/${version}/${artifactId}-xxx.jar
2015-3-19 10:20:47 org.apache.commons.httpclient.HttpMethodBase processResponseHeaders
警告: Cookie rejected: "$Version=0; rememberMe=deleteMe; $Path=/nexus". Illegal path attribute "/nexus". Path of origin: "/content/"
2015-3-19 10:20:47 org.apache.commons.httpclient.HttpMethodBase processResponseHeaders
警告: Cookie rejected: "$Version=0; rememberMe=deleteMe; $Path=/nexus". Illegal path attribute "/nexus". Path of origin: "/content/repositories/"
2015-3-19 10:20:47 org.apache.commons.httpclient.HttpMethodBase processResponseHeaders
警告: Cookie rejected: "$Version=0; rememberMe=deleteMe; $Path=/nexus". Illegal path attribute "/nexus". Path of origin: "/content/repositories/snapshots/"
2015-3-19 10:20:47 org.apache.commons.httpclient.HttpMethodBase processResponseHeaders
警告: Cookie rejected: "$Version=0; rememberMe=deleteMe; $Path=/nexus". Illegal path attribute "/nexus". Path of origin: "/content/repositories/snapshots/${groupId}/"
2015-3-19 10:20:47 org.apache.commons.httpclient.HttpMethodBase processResponseHeaders
警告: Cookie rejected: "$Version=0; rememberMe=deleteMe; $Path=/nexus". Illegal path attribute "/nexus". Path of origin: "/content/repositories/snapshots/${groupId}/${artifactId}/"
2015-3-19 10:20:47 org.apache.commons.httpclient.HttpMethodBase processResponseHeaders
警告: Cookie rejected: "$Version=0; rememberMe=deleteMe; $Path=/nexus". Illegal path attribute "/nexus". Path of origin: "/content/repositories/snapshots/${groupId}/${artifactId}/${version}/"
2015-3-19 10:20:47 org.apache.commons.httpclient.HttpMethodBase processResponseHeaders
警告: Cookie rejected: "$Version=0; rememberMe=deleteMe; $Path=/nexus". Illegal path attribute "/nexus". Path of origin: "/content/repositories/snapshots/${groupId}/${artifactId}/${version}/${artifactId}-xxx.jar"
…… ……
[INFO] Uploaded: http://maven.mysite.com/content/repositories/snapshots/${groupId}/${artifactId}/${version}/${artifactId}-3.0.4-20150319.022040-25.jar (60 KB at 76.6 KB/sec)
系统环境
私服是搭建在一台 Windows Server 2008 的阿里云server上，Nexus 的版本号为 2.8.1，通过 Ngnix 1.7.10 进行反向代理（http://maven.mysite.com/ 直接指向 http://127.0.0.1:8081/nexus）。
开发机是 Windows 7，使用 Maven 版本号为 3.0.4。
问题分析
依据控制台输出的警告信息可知，这是 cookie 的 path 属性不一致，须要 path=/nexus 下的 cookie，而如今相应的路径 /content/repositories/snapshots/${groupId}/${artifactId}/${version}/ 中并不包括 /nexus 这一级。
依据这个推断，于是我将 snapshots 的 URL 由 http://maven.gboat.xyz/content/repositories/snapshots
改为 http://maven.gboat.xyz:8081/nexus/content/repositories/snapshots，然后又一次运行 mvn clean deploy 公布 jar 包到私服，这一次的公布过程中果然没有出现不论什么警告信息。
由于改动之后的这个 URL 是没有通过 Nginx 作代理进行转发的，所以。如今已经能够确定问题是出在 Nginx 的代理配置这一块了。
解决方式
问题产生的原因已经找到了。接下来就是依据问题原因寻找相应的解决方式了。
经过查阅资料得知。仅仅须要在 Nginx 的代理配置中添加 cookie 的 path 映射关系就可以。官方文档请參见：ngx_http_proxy_module
模块中的 proxy_cookie_path，改动后的配置例如以下：
# Maven
server {
listen 80;
server_name maven.mysite.com; location / {
proxy_pass http://127.0.0.1:18081/nexus/;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Upgrade $http_upgrade;
proxy_cookie_path /nexus /;
…… ……
}
location ~ ^/nexus/(.*)$ {
return 301 /$1;
}
}
另外，假设您是使用的 Apathe 做反向代理。那应该通过 ProxyPassReverseCookiePath 进行配置，如：
ProxyPassReverseCookiePath /nexus /
參考资料：http://books.sonatype.com/nexus-book/reference/install-sect-proxy.html
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