Gradle 构建失败 [无法解析配置 ':compile' 的所有依赖项。]

Question

I am trying for so many days to resolve this exception, followed many blogs and couldn't find solution. when I run a bundle.gradle by giving jettyRun as command

I am getting an exception 



    **FAILURE: Build failed with an exception.

        * What went wrong:
        Could not resolve all dependencies for configuration ':compile'.
        > Could not resolve javax.servlet:servlet-api:2.5.
          Required by:
              :1-SimpleServlet:unspecified
           > Could not GET 'http://repo1.maven.org/maven2/javax/servlet/servlet-api/2.5/servlet-api-2.5.pom'.
              > Connection to http://repo1.maven.org refused
        > Could not resolve org.apache.commons:commons-io:1.3.2.
          Required by:
              :1-SimpleServlet:unspecified
           > Could not GET 'http://repo1.maven.org/maven2/org/apache/commons/commons-io/1.3.2/commons-io-1.3.2.pom'.
              > Connection to http://repo1.maven.org refused**

Answer 1

The real error is this:

Connection to http://repo1.maven.org refused

Gradle needs to download the dependencies listed in the error message to be able to compile the project.

You're probably behind a firewall or your Internet connection isn't working. You need to make sure Gradle can access http://repo1.maven.org .

Note: Maven Central ( http://repo1.maven.org ) can be accessed with a browser. If you see the message "Browsing for this directory has been disabled" that means your browser could connect to the server (the error is a special message my Maven Central, not a standard HTTP error message).

If you see this but Maven or Gradle fail, then you need to check your browser's/OS's proxy settings and configure your tool accordingly.

Related:

• How do I use Maven through a proxy?
• Gradle proxy configuration

Answer 2

将--refresh-dependencies开关与gradle一起使用，可以帮助我解决此问题。

Answer 3

@Aaron Digulla said I have firewall problem.

I was having problem with GSON dependency , (hope it will solve other dependecy problems also) and this answer solved the problem. Stack Overflow Could not resolve all dependencies for configuration ':classpath'

@Kangars post : This is what i have in my gradle.build for build script and allprojects

buildscript {
repositories {
    jcenter {
        url "http://jcenter.bintray.com/"
    }
  }
}

allprojects {
repositories {
    jcenter {
        url "http://jcenter.bintray.com/"
    }
  }
}

Answer 4

This is because of slow internet connection or you haven't configure proxy settings correctly. Gradle needs to download some dependencies , if it cant access the repository it fires this error. All you have to do is check your internet connection and make sure gradle can access the maven repository.

Answer 5

It looks like you don't have a working internet connection or haven't configured your proxy/firewall. Please check if you can access repo1.maven.org from commandline or a browser.

Answer 6

I used the steps below to fix it.

1. Go to command prompt and set the java opts.

    SET JAVA_OPTS=-Dhttp.proxyHost=your_proxy_server_name -Dhttp.proxyPort=your_proxy_port -Dhttp.nonProxyHosts=127.0.0.1 

2. Then build your Gradle application and all the connection refused errors no longer appear.

   gradle clean build distZip

Answer 7

就我而言，当我将gradle版本从4.6更改为4.7时，问题得以解决。

Answer 8

The root cause Connection to http://repo1.maven.org refused indicates that the build is failing as gradle is not able to fetch some dependencies from the repository.

Here is a list of causes and corresponding resolutions you might want to try:

1. Internet connectivity issues - Have a good internet speed and connectivity
2. Firewall (system or third party) - Ensure firewall is not blocking access to the repository
3. Working behind a proxy - Gradle proxy configuration
4. Firewall or some random application meddling with proxy application ¹ - Kill the process meddling with the proxy application
5. The proxy application causes certificate problems ² - Import proxy application's certificate

References:

1. Telerik forum's answer on how to fix internet connectivity issue while using Fiddler
2. Telerik forum's answer on secure connection issue while using Fiddler

Answer 9

For my case it was a poor connection issue so the IDE couldn't get resources online