Cannot configure an empty mirrors.hostname to avoid using mirrors for "ant snapshot-bundle"

• Type: Task
• Status: Closed
• Priority: Trivial
• Resolution: Completed
• Affects Version/s: 7.0.X, 7.1.X, 7.2.X, Master
• Fix Version/s: 7.0.X, 7.1.X, 7.2.10 DXP FP17, 7.2.10.6 DXP SP6, 7.2.X
• Component/s: Dev Tools > Portal Build Env
• Labels:
  • 7010-sp-pending
  • 7110-sp-pending
  • 7210-sp-pending
  • liferay-dxp-72-sp6
  • liferay-fixpack-dxp-17-7210
  • snapshot-bundle
• Branch Version/s:
  7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Git Pull Request: https://github.com/pyoo47/liferay-portal/pull/1413

When you execute ant snapshot-bundle, it will always try to download it from default mirror:

mirrors.hostname=mirrors.lax.liferay.com

In case you are working from home and don't have access to that server, this causes some minor problems: build process will retry using the mirror after 30 seconds:

[mirrors-get] Unable to connect to http://mirrors.lax.liferay.com/files.liferay.com/private/ee/portal/snapshot-master-private/latest/liferay-portal-tomcat-master-private.7z.sha256, will retry in 30 seconds.

In order to save that 30 seconds, if you want to disable the mirror usage and you configure it with an empty value:

mirrors.hostname=

And you execute ant snapshot-bundle, following error is produced:

snapshot-bundle:
[mirrors-get] Downloading http:/files.liferay.com/private/ee/portal/snapshot-master-private/latest/liferay-portal-tomcat-master-private.7z.sha256 to /home/jorge/.liferay/mirrors/files.liferay.com/private/ee/portal/snapshot-master-private/latest/liferay-portal-tomcat-master-private.7z.sha256.

BUILD FAILED
/home/jorge/code/portal-master/build.xml:1045: java.lang.RuntimeException: java.lang.IllegalArgumentException: protocol = http host = null
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1512)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
        at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:3097)
        at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:489)
        at com.liferay.ant.mirrors.get.MirrorsGetTask.openConnection(MirrorsGetTask.java:465)
        at com.liferay.ant.mirrors.get.MirrorsGetTask.toOutputStream(MirrorsGetTask.java:512)
        at com.liferay.ant.mirrors.get.MirrorsGetTask.toFile(MirrorsGetTask.java:493)
        at com.liferay.ant.mirrors.get.MirrorsGetTask._downloadFile(MirrorsGetTask.java:579)
        at com.liferay.ant.mirrors.get.MirrorsGetTask.downloadFile(MirrorsGetTask.java:279)
        at com.liferay.ant.mirrors.get.MirrorsGetTask.doExecute(MirrorsGetTask.java:242)
        at com.liferay.ant.mirrors.get.MirrorsGetTask.execute(MirrorsGetTask.java:48)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
        at org.apache.tools.ant.Task.perform(Task.java:350)
        at org.apache.tools.ant.Target.execute(Target.java:449)
        at org.apache.tools.ant.Target.performTasks(Target.java:470)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1391)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1254)
        at org.apache.tools.ant.Main.runBuild(Main.java:830)
        at org.apache.tools.ant.Main.startAnt(Main.java:223)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:284)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:101)
Caused by: java.lang.IllegalArgumentException: protocol = http host = null
        at sun.net.spi.DefaultProxySelector.select(DefaultProxySelector.java:177)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
        at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:990)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1570)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
        at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
        ... 23 more

The expected behavior should be:

• It is possible to configure an empty mirrors.hostname
• In that situation, the mirror servers will be ignored and no error will be produced when you execute ant snapshot-bundle