'Exception in thread "main" java.net.UnknownHostException: services.gradle.org

I am getting the below error when executing gradle.bat. I have checked the URL path and it looks fine. The URL is defined like this in the wrapper properties:

distributionUrl=https\://services.gradle.org/distributions/gradle-2.1-bin.zip

Here's the error message:

Downloading https://services.gradle.org/distributions/gradle-2.1-bin.zip
Exception in thread "main" java.net.UnknownHostException: services.gradle.org at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:195)

Could someone help me on this?

Solution 1:^[1]

Go to "C:\Users\[yourusername]\.gradle\" folder (hidden folder - Go to folder option and enable show hidden files if folder is not showing up)
Look for file "gradle.properties" if DOES NOT (most likely this would be the case) exists, Create it under "C:\Users\[yourusername]\.gradle\
Copy and paste following code (More detail ... https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties ... look for "20.3 Accessing the web via proxy" for https and user/pwd variables)

systemProp.http.proxyHost=[PROXY SERVER] systemProp.http.proxyPort=[PROXY PORT]

save and try again

Solution 2:^[2]

look for gradle.properties file open it and change from 'distributionUrl=https\' to 'distributionUrl=http\' that will fix it.

Solution 3:^[3]

1) Go to your project directory

2) Find below file on your project directory:

gradlew
gradlew.bat

3) Edit gradlew file and change DEFAULT_JVM_OPTS variable value as below:

DEFAULT_JVM_OPTS="-Dhttp.proxyHost=XXXX -Dhttp.proxyPort=XXXX -Dhttp.proxyUser=XXXX -Dhttp.proxyPassword=XXXX  -Dhttps.proxyHost=XXXX -Dhttps.proxyPort=XXXX -Dhttps.proxyUser=XXXX-Dhttps.proxyPassword=XXXX"

save it.

4) Edit gradlew.bat file and change DEFAULT_JVM_OPTS variable value as below:

set DEFAULT_JVM_OPTS=-Dhttp.proxyHost=XXXX -Dhttp.proxyPort=XXXX -Dhttp.proxyUser=XXXX -Dhttp.proxyPassword=XXXX  -Dhttps.proxyHost=XXXX -Dhttps.proxyPort=XXXX -Dhttps.proxyUser=XXXX-Dhttps.proxyPassword=XXXX

save it.

5) Now run your "gradlew clean build" and check.

Please set your appropriate value on the place of XXXX

Note: gradlew is use for linux system user and gradlew.bat is user for window system user

Solution 4:^[4]

I was facing the same problem when I was connected to WiFi with a download speed of 80 Mbps which is good enough, I guess. After spending hours while still being clueless, I just changed the network. Connected to hotspot from my mobile data with a much lower download speed of around 4 Mbps. The error vanished! Maybe something was wrong with the WiFi.

Solution 5:^[5]

Make sure you have enough bandwidth for the download.
I had the same problem just 15 minutes ago (that's why I'm on this page in the first place). Same error message --- and then I noticed that my uTorrent client was occupying the whole datalink. So I killed it, and run gradlew.bat again. This time everything went just fine...

Solution 6:^[6]

I had similar issue, fixed by following steps:

Created: C:\Users\<username>\.gradle\gradle.properties

Values entered in the property file as below:

systemProp.https.proxyHost="company proxy server" 
systemProp.https.proxyPort="company proxy port " 
systemProp.https.proxyUser="user login "
systemProp.https.proxyPassword="password " 
systemProp.https.nonProxyHosts=localhost

You can try HTTP instead of HTTPS.

Solution 7:^[7]

I had this problem for a flutter project and what I did was create a new flutter project with the same name as my problem flutter project. I then copied the files from the "android" directory from the new project into the existing flutter project. Basically some set up file was messed up. I don't know which one, but this did the trick

Solution 8:^[8]

Maybe it's a bit late but you might have to try to UPDATE your ANDROID STUDIO. Had a similar problem, working on Linux pop_os (Ubuntu derivative). So I had Android SDK on my $PATH and everything set well but Ionic v3 build was having a Gradle issues while trying to download.

I simply updated my Android Studio and tried again and it worked. Good luck

Solution 9:^[9]

Go to your command prompt and set the HTTP and HTTPS proxy

Execute the below in your cmd -

set HTTP_PROXY=http://<proxyservername>:<port>

set HTTPS_PROXY=http://<proxyservername>:<port>?

Once you have set your proxy variables , try rebuilding or re-assembling your application / project

Solution 10:^[10]

I've got an issue with Android studio. The value of the distributionUrl field in the graddle-wrapper.properties has been changed during package name refactoring.

Solution 11:^[11]

Just remove your .android and .gradle folder from C:\Users\[Your user name]\

Uninstall android studio and reinstall it

Open any simple android studio project and run it. It will automatically set up the Gradle and other things

Close the project and run your flutter project. It works for me!!!

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Chintan Desai
Solution 2	Med. A.
Solution 3	Piyush Chaudhari
Solution 4	Chirag Mittal
Solution 5	Igor Soudakevitch
Solution 6	Unheilig
Solution 7	MobileMon
Solution 8	Tadiwanashe
Solution 9	Deepa
Solution 10	ZdenÄ›k MlÄoch
Solution 11	a.ak

'Exception in thread "main" java.net.UnknownHostException: services.gradle.org

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