See the stacktrace

Mar 12, 2014 5:37:05 PM jenkins.InitReactorRunner$1 onTaskFailed
SEVERE: Failed Loading job Gerrit_check_job
java.lang.NullPointerException
at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTriggerTimer.schedule(GerritTriggerTimer.java:87)
at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTriggerTimerTask.<init>(GerritTriggerTimerTask.java:44)
at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTrigger.start(GerritTrigger.java:352)
at com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTrigger.start(GerritTrigger.java:110)
at hudson.model.AbstractProject.onLoad(AbstractProject.java:327)
at hudson.model.Project.onLoad(Project.java:90)
at hudson.model.Items.load(Items.java:221)
at jenkins.model.Jenkins$18.run(Jenkins.java:2616)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
at jenkins.model.Jenkins$7.runTask(Jenkins.java:945)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)