Repositories in gradle project were not indexed

Question

I'm trying to synchronize a gradle project with some dependences to Spring Boot and Maven, but there is an error that indicates the following repositories used in the project are not indexed yet:

Unindexed remote maven repositories found.

The following repositories used in your gradle projects were not indexed yet:

http://repo.spring.io/milestone

http://repo.spring.io/snapshot

https://repo1.maven.org/maven2

https://plugins.gradle.org/m2

If you want to use dependency completion for these repositories artifacts, Open Repositories List, select required repositories and press "Update" button.

Then I'm trying to update the remote repositories manually, but I'm getting an error while I trying to do.

Any know what can I do to resolve the issue?

I'm using IntelliJ IDEA 2017.1.6 and the gradle version is 2.2, I leave the build.gradle file of the project with the dependencies that I use.

group 'com.scl.boot'
version '0.5'

    apply plugin: 'java'
    apply plugin: 'groovy'
    apply plugin: 'war'
    apply plugin: 'spring-boot'
    apply plugin: 'org.sonarqube'
    apply plugin: 'com.bmuschko.cargo'

sourceCompatibility = JavaVersion.VERSION_1_7
targetCompatibility = JavaVersion.VERSION_1_7

    buildscript {
        repositories {
            jcenter()
            maven { url 'http://repo.spring.io/snapshot' }
            maven { url 'http://repo.spring.io/milestone' }
            maven { url 'https://plugins.gradle.org/m2/'}
        }
        dependencies {
            classpath 'org.springframework.boot:spring-boot-gradle-plugin:1.2.7.RELEASE'
            classpath 'org.sonarqube.gradle:gradle-sonarqube-plugin:1.1'
            classpath 'com.bmuschko:gradle-cargo-plugin:2.2.1'
        }
    }

    repositories {
        maven { url 'http://repo.spring.io/snapshot' }
        maven { url 'http://repo.spring.io/milestone' }
        mavenCentral()
        jcenter()
    }

    dependencies {
        
        compile 'org.springframework.boot:spring-boot-starter-web'
        compile 'org.springframework.boot:spring-boot-starter-aop'
        compile 'org.springframework.boot:spring-boot-starter-logging'
        compile 'org.springframework.boot:spring-boot-starter-security'
        compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-rest', version: '1.3.6.RELEASE'

        compile 'org.jsondoc:spring-boot-starter-jsondoc:1.2.9'
        compile 'org.jsondoc:jsondoc-ui-webjar:1.2.9'
        
        compile 'org.springframework:spring-jdbc'
        compile 'org.springframework.data:spring-data-oracle:1.2.1.RELEASE'
        
        compile group: 'cn.easyproject', name: 'ojdbc7', version: '12.1.0.2.0'

        compile group: 'org.springframework.data', name: 'spring-data-jdbc-core', version: '1.2.1.RELEASE'
        
        compile 'org.apache.tomcat:tomcat-dbcp:8.0.28'
        
        compile 'org.slf4j:slf4j-api:1.7.+'
        
        compile 'org.op4j:op4j-jodatime:1.1'
        
        compile 'org.springframework.boot:spring-boot-devtools:1.3.0.M2'
        
        compile group: 'com.google.code.gson', name: 'gson', version: '2.7'
        compile 'org.json:json:20151123'
        
        compile 'org.apache.commons:commons-lang3:3.4'
        
        compile 'org.codehaus.groovy:groovy-all'
        
        compile group: 'com.fasterxml.jackson.core', name: 'jackson-core', version: '2.8.3'
        compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.8.3'
        compile group: 'com.fasterxml.jackson.dataformat', name: 'jackson-dataformat-xml', version: '2.8.3'


       
        cargo 'org.jboss.as:jboss-as-controller-client:7.2.0.Final'
        compile group: 'org.codehaus.cargo', name: 'cargo-core-uberjar', version: '1.5.0'
        cargo 'org.codehaus.cargo:cargo-ant:1.4.16'

        testCompile group: 'junit', name: 'junit', version: '4.11'
        testCompile 'org.springframework.boot:spring-boot-starter-test:1.2.7.RELEASE'
        testCompile group: 'org.spockframework', name: 'spock-core', version: '1.0-groovy-2.4'
    }


    war {
        archiveName = "CyCRest.war"
        configurations {
            runtime.exclude module: 'spring-boot-starter-tomcat'
            runtime.exclude module: 'spring-boot-starter-logging'
        }
    }

[EDIT] This is the idea.log file with the exceptions that I'm getting:

java.io.IOException: Transfer for nexus-maven-repository-index.gz failed

Download the log file.