public boolean isReady() {
    try {
      checkReady();
      return true;
    } catch (Exception e) {
      logger.info(
          "Unexpected exception occurs in {}, error msg is {}",
          this,
          ExceptionUtils.getRootCause(e).toString());
      return false;
    }
  }
return self, the method doesn't need to be called by the user and will be triggered after the
RPC is finished.
iotdb-core/consensus/src/main/java/org/apache/iotdb/consensus/iot/client/AsyncIoTConsensusServiceClient.java