private void setHBaseFsTmpDir() throws IOException {
    String hbaseFsTmpDirInString = this.conf.get("hbase.fs.tmp.dir");
    if (hbaseFsTmpDirInString == null) {
      this.conf.set("hbase.fs.tmp.dir", getDataTestDirOnTestFS("hbase-staging").toString());
      LOG.info("Setting hbase.fs.tmp.dir to " + this.conf.get("hbase.fs.tmp.dir"));
    } else {
      LOG.info("The hbase.fs.tmp.dir is set to " + hbaseFsTmpDirInString);
    }
  }
Creates a hbase walDir in the user's home directory. Normally you won't make use of this
method. Root hbaseWALDir is created for you as part of mini cluster startup. You'd only use
this method if you were doing manual operation.
@return Fully qualified path to hbase root dir
hbase-testing-util/src/main/java/org/apache/hadoop/hbase/HBaseTestingUtility.java