关于hadoop 提交jar的运行如下：
1）https://www.cnblogs.com/admln/p/hadoop2-work-excute-submit.html
2） https://blog.csdn.net/pzqingchong/article/details/77131004
注意： hadoop 3.x中， org.apache.hadoop.util.RunJar 的临时目录是通过 java.io.tmpdir 传入的，如下图所示。
File tmpDir = new File(System.getProperty("java.io.tmpdir")); ensureDirectory(tmpDir); final File workDir; try { workDir = File.createTempFile("hadoop-unjar", "", tmpDir); } catch (IOException ioe) { // If user has insufficient perms to write to tmpDir, default // "Permission denied" message doesn't specify a filename. System.err.println("Error creating temp dir in java.io.tmpdir " + tmpDir + " due to " + ioe.getMessage()); System.exit(-1); return; }原来的老版本却是Configuration().get("hadoop.tmp.dir")
