Not builtConsole Output

Established TCP socket on 49058
<===[JENKINS REMOTING CAPACITY]===>channel started
Executing Maven:  -B -f /home/hudson/genie.microprofile/.jenkins/jobs/OpenTracing-maven-snapshots/workspace/pom.xml -pl !spec -Peclipse-jarsigner install
[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for org.eclipse.microprofile.opentracing:microprofile-opentracing-tck:jar:1.0-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.eclipse.cbi.maven.plugins:eclipse-jarsigner-plugin is missing. @ line 103, column 29
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]