UnknownHostException 错误，构建 java grpc 示例 [英] UnknownHostException error, building java grpc example
问题描述
我正在关注 这个 grpc 教程 和我什至无法通过第一步.第一步是git clone项目然后运行
I am following this grpc tutorial and I haven't even been able to make it through the first step. The first step is to git clone the project and then run
cd examples
./gradlew installDist
我被这个堆栈跟踪击中了
I am hit with this stack trace
Downloading https://services.gradle.org/distributions/gradle-2.13-bin.zip
Exception in thread "main" java.net.UnknownHostException: services.gradle.org
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:668)
at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:173)
at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at org.gradle.wrapper.Download.downloadInternal(Download.java:58)
at org.gradle.wrapper.Download.download(Download.java:44)
at org.gradle.wrapper.Install$1.call(Install.java:61)
at org.gradle.wrapper.Install$1.call(Install.java:48)
at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
at org.gradle.wrapper.Install.createDist(Install.java:48)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:128)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
我认为这是一个代理问题，所以我从 这篇文章 并打开文件
I thought that was a proxy issue, so I took some inspiration from this post and opened up the file
gradle/wrapper/gradle-wrapper.properties
并添加行
systemProp.http.proxyHost=<my proxy>
systemProp.http.proxyPort=<my port>
我也用这个替换了 distributionUrl 行
I also replaced distributionUrl line with this
distributionUrl=http://services.gradle.org/distributions/gradle-2.13-bin.zip
也就是我切换了https --> http.
That is, I switched https --> http.
在这一切之后，我仍然得到相同的堆栈跟踪.
After all of this, I am still getting the same stack trace.
有人有什么建议吗?
我添加了一个
gradle.properties
主目录中的文件，并添加字段
file in the home directory, and added the fields
systemProp.http.proxyHost
systemProd.http.proxyPort
和
systemProp.https.proxyHost
systemProp.https.proxyPort
但我仍然遇到与以前相同的错误.然而，构建脚本似乎停在这一行
but I still got the same error as before. HOWEVER, the build script appeared to stall on this line
Downloading https://services.gradle.org/distributions/gradle-2.13-bin.zip
大约 10 秒左右，在失败之前.所以……进步了吗?
For about 10 seconds or so, before failing. So... progress?
推荐答案
我遇到了同样的问题，2个小时后终于找到了这个解决方案...
I had the same problem and finally found this solution after 2 hours...
转到项目中的 gradlew.bat 文件并更改 DEFAULT_JVM_OPTS 变量如下:
Go to the file gradlew.bat in your project and change DEFAULT_JVM_OPTS variable as below:
set DEFAULT_JVM_OPTS=-Dhttp.proxyHost=YOUR_HOST -Dhttp.proxyPort=PORT -Dhttp.proxyUser=USERNAME -Dhttp.proxyPassword=PASSWORD -Dhttps.proxyHost=YOUR_HOST -Dhttps.proxyPort=PORT -Dhttps.proxyUser=USERNAME -Dhttps.proxyPassword=PASSWORD
然后运行gradlew clean build.
这篇关于UnknownHostException 错误，构建 java grpc 示例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
