List<Job> posts=parseJobs( jobContext, applicationContext, jobBean,jobBean.getJobDescriptor().getPostProcessers(),history,workDir);
posts.add(new ZooKeeperJob(jobContext, null, applicationContext));
//核心处理Job创建
Job core=null;
if(jobBean.getJobDescriptor().getJobType()==JobRunType.MapReduce){
core=new MapReduceJob(jobContext);
}else if(jobBean.getJobDescriptor().getJobType()==JobRunType.Shell){
core=new HadoopShellJob(jobContext);
}else if(jobBean.getJobDescriptor().getJobType()==JobRunType.Hive){
core=new HiveJob(jobContext,applicationContext);
}