The following patches are failing to build artifacts:

1. https://gerrit.ovirt.org/#/c/79540/1
2. https://gerrit.ovirt.org/#/c/79433/3

Though, it seems that the root for the failure is patch [2] as patch [1] was merged after patch [2], and patch [2] failed to build artifacts.

Error snippet from Console Output:

...
...
[INFO] UserPortal ........................................ FAILURE [1:34.567s]
...
...
[ERROR] Failed to execute goal org.codehaus.mojo:gwt-maven-plugin:2.8.0:compile (gwtcompile) on project userportal: Command [[
[ERROR] /bin/sh -c '/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.131-3.b12.el7_3.x86_64/jre/bin/java' '-javaagent:/root/.m2/repository/org/aspectj/aspectjweaver/1.8.10/aspectjweaver-1.8.10.jar' '-Dgwt.jjs.permutationWorkerFactory=com.google.gwt.dev.ThreadedPermutationWorkerFactory' '-Dgwt.jjs.maxThreads=4' '-Djava.io.tmpdir=/home/jenkins/workspace/ovirt-engine_master_build-artifacts-el7-x86_64/ovirt-engine/rpmbuild/BUILD/ovirt-engine-4.2.0/frontend/webadmin/modules/userportal-gwtp/target/tmp' '-Djava.util.prefs.systemRoot=/home/jenkins/workspace/ovirt-engine_master_build-artifacts-el7-x86_64/ovirt-engine/rpmbuild/BUILD/ovirt-engine-4.2.0/frontend/webadmin/modules/userportal-gwtp/target/tmp' '-Djava.util.prefs.userRoot=/home/jenkins/workspace/ovirt-engine_master_build-artifacts-el7-x86_64/ovirt-engine/rpmbuild/BUILD/ovirt-engine-4.2.0/frontend/webadmin/modules/userportal-gwtp/target/tmp' '-Djava.util.logging.config.class=org.ovirt.engine.ui.gwtaop.JavaLoggingConfig' '-Xms1G' '-Xmx4G' '-Dgwt.dontPrune=org\.ovirt\.engine\.core\.(common|compat)\..*' 'com.google.gwt.dev.Compiler' '-logLevel' 'INFO' '-war' '/home/jenkins/workspace/ovirt-engine_master_build-artifacts-el7-x86_64/ovirt-engine/rpmbuild/BUILD/ovirt-engine-4.2.0/frontend/webadmin/modules/userportal-gwtp/target/generated-gwt' '-localWorkers' '1' '-failOnError' '-XfragmentCount' '-1' '-sourceLevel' 'auto' '-style' 'OBF' '-gen' '/home/jenkins/workspace/ovirt-engine_master_build-artifacts-el7-x86_64/ovirt-engine/rpmbuild/BUILD/ovirt-engine-4.2.0/frontend/webadmin/modules/userportal-gwtp/gen' 'org.ovirt.engine.ui.userportal.UserPortal'
[ERROR] ]] failed with status 1
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :userportal