UnknownHostException: download.jboss.org after installation of software from central to devstudio

eclipse.buildId=12.11.0.GA-v20190321-1925-B4244
java.version=11.0.2
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Framework arguments:  -product com.jboss.devstudio.core.product
Command-line arguments:  -os linux -ws gtk -arch x86_64 -product com.jboss.devstudio.core.product

org.eclipse.equinox.p2.transport.ecf
Error
Tue Mar 26 21:50:38 CET 2019
Unknown Host: http://download.jboss.org/jbosstools/usage/installs/central-site/4.10.0-SNAPSHOT/Final/Final-v20190321-1038-B5324/org.jboss.tools.maven.jbosspackaging.feature

java.net.UnknownHostException: download.jboss.org
	at java.base/java.net.InetAddress$CachedAddresses.get(InetAddress.java:797)
	at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:883)
	at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1505)
	at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1364)
	at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1298)
	at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:45)
	at org.apache.http.impl.conn.DefaultClientConnectionOperator.resolveHostname(DefaultClientConnectionOperator.java:263)
	at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:162)
	at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:326)
	at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:610)
	at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:445)
	at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835)
	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
	at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientFileSystemBrowser.runRequest(HttpClientFileSystemBrowser.java:263)
	at org.eclipse.ecf.provider.filetransfer.browse.AbstractFileSystemBrowser$DirectoryJob.run(AbstractFileSystemBrowser.java:69)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)