@Override
      public void reset() throws InterruptedIOException {
        isEnd = false;
        InterruptedIOException e = null;
        for (RowChecker checker : checkers) {
          try {
            checker.reset();
          } catch (InterruptedIOException ex) {
            e = ex;
          }
        }
        if (e != null) {
          throw e;
        }
      }
The number of task simultaneously executed on a single region server.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/SimpleRequestController.java