@Override
    protected void before() throws Throwable {
      final HBaseTestingUtil testingUtil = testingUtilSupplier.get();
      testingUtil.waitTableAvailable(TableName.META_TABLE_NAME);
    }
Wait for the underlying cluster to come up -- defined by meta being available.
hbase-server/src/test/java/org/apache/hadoop/hbase/TestServerInternalsTracing.java