all master executors are dead => https://wiki.jenkins-ci.org/display/JENKINS/Dead+Executor

java.lang.ArrayIndexOutOfBoundsException: Assertion error: failing to load #8 EXACT: lo=369,hi=0,size=370,size2=370
at jenkins.model.lazy.AbstractLazyLoadRunMap.search(AbstractLazyLoadRunMap.java:418)
at jenkins.model.lazy.AbstractLazyLoadRunMap.getByNumber(AbstractLazyLoadRunMap.java:502)
at jenkins.model.lazy.AbstractLazyLoadRunMap.search(AbstractLazyLoadRunMap.java:355)
at jenkins.model.lazy.AbstractLazyLoadRunMap.newestBuild(AbstractLazyLoadRunMap.java:297)
at hudson.model.AbstractProject.getLastBuild(AbstractProject.java:1014)
at hudson.model.AbstractProject.getLastBuild(AbstractProject.java:137)
at hudson.model.Job.isLogUpdated(Job.java:264)
at hudson.model.AbstractProject.getCauseOfBlockage(AbstractProject.java:1204)
at hudson.model.AbstractProject.isBuildBlocked(AbstractProject.java:1141)
at hudson.model.Queue.isBuildBlocked(Queue.java:937)
at hudson.model.Queue.maintain(Queue.java:982)
at hudson.model.Queue.pop(Queue.java:861)
at hudson.model.Executor.grabJob(Executor.java:284)
at hudson.model.Executor.run(Executor.java:205)