Services.gradle.org seems blocked on automated build

snapcraft
1

I cannot figure out why the creation of a snap (geogebra-discovery) fails on the automated build server:

Downloading https://services.gradle.org/distributions/gradle-6.7.1-bin.zip

Exception in thread "main" java.net.UnknownHostException: services.gradle.org
	at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:220)

I guess Gradle wants to connect to some servers, maybe services.gradle.org, but this seems blocked. I use my own build machinery to build the application, so I don’t use the gradle plugin.

A similar issue was reported at https://stackoverflow.com/questions/51244696/unable-to-access-gradle-plugin-url-with-snapcraft, but that one used the gradle plugin.

Thanks for any suggestion in advance.

2

Ancient post I know, but in case it helps anyone else (and as the author of that linked Stackoverflow question which I’ve since updated) - use -Djava.net.useSystemProxies=true as an additional option to Gradle.

3

Thanks! Finally I learned that if the gradle plugin is used, things just work (connection to outside is allowed). Otherwise, connections to Gradle repositories are blocked.

4

Just bear in mind that the Gradle plugin is sadly not compatible with the newer corexx bases. I used to use that Gradle plugin, but had to shift away from it (and thus do some more investigating / debugging to work out what was going on.)

Good news though is with the above option you can avoid the plugin entirely if you wish :slight_smile:

1 Like
5

Unfortunately, this option does not work in core22 at the moment. I had to use Remote build fails to resolve 'services.gradle.org' - #9 by norse-dreki, but it does not work locally, just when the server builds the snap.