hadoop job.class 源码分析

waitForCompletion()方法 里面，提交作业给集群，并且等待作业完成

/*** Submit the job to the cluster and wait for it to finish.* @param verbose print the progress to the user* @return true if the job succeeded* @throws IOException thrown if the communication with the*         <code>JobTracker</code> is lost*/public boolean waitForCompletion(boolean verbose) throws IOException, InterruptedException,ClassNotFoundException {if (state == JobState.DEFINE) {submit();}if (verbose) {jobClient.monitorAndPrintJob(conf, info);} else {info.waitForCompletion();}return isSuccessful();}