求大神！当我运行maven clean install build是出现如下错误

Question

[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.bcd:test:war:0.0.1-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 20, column 21
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]

[INFO] ------------------------------------------------------------------------
[INFO] Building test Maven Webapp 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ test ---
[INFO] Downloading: http://192.168.3.251:8081/nexus/content/groups/public/org/sonatype/forge/forge-parent/5/forge-parent-5.pom
四月 14, 2017 8:04:20 上午 org.apache.maven.wagon.providers.http.httpclient.impl.execchain.RetryExec execute
信息: I/O exception (org.apache.maven.wagon.providers.http.httpclient.NoHttpResponseException) caught when processing request: The target server failed to respond
四月 14, 2017 8:04:20 上午 org.apache.maven.wagon.providers.http.httpclient.impl.execchain.RetryExec execute
信息: Retrying request

Answer 1

看看你maven环境变量有没有配置