作業(yè)啟動(dòng) 作業(yè)提交的客戶(hù)端比較核心的類(lèi)是Job.java，看作業(yè)啟動(dòng)的源碼需要從這個(gè)類(lèi)開(kāi)始看。 Job.java 作業(yè)啟動(dòng)的入口函數為waitForCompletion函數。當前函數的核心函數為submit()，主要如下： public void submit() throws IOException, InterruptedException, ClassNotFoundException { ensureState(JobState.DEFINE); setUseNewAPI(); connect(); final JobSubmitter submitter = getJobSubmitter(cluster.getFileSystem(), cluster.getClient()); status = ugi.doAs(new PrivilegedExceptionAction<JobStatus>() { public JobStatus run() throws IOException, InterruptedException, ClassNotFoundEx....