@Override
    public void start(CoprocessorEnvironment e) throws IOException {
      this.delayMillis = e.getConfiguration().getLong("delayingregionobserver.delay", 3000);
    }
Verify that thrift2 client calling thrift server can get the thrift server type correctly.
hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift2/TestThriftHBaseServiceHandler.java