test_memory_limit/test.py:55: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
helpers/cluster.py:3631: in query
    return self.client.query(
helpers/client.py:36: in wrap
    return func(self, *args, **kwargs)
helpers/client.py:74: in query
    ).get_answer()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <helpers.client.CommandRequest object at 0xffaa0361aa10>

    def get_answer(self):
        self.process.wait(timeout=DEFAULT_QUERY_TIMEOUT)
        self.stdout_file.seek(0)
        self.stderr_file.seek(0)
    
        stdout = self.stdout_file.read().decode("utf-8", errors="replace")
        stderr = self.stderr_file.read().decode("utf-8", errors="replace")
    
        if (
            self.timer is not None
            and not self.process_finished_before_timeout
            and not self.ignore_error
        ):
            logging.debug(f"Timed out. Last stdout:{stdout}, stderr:{stderr}")
            raise QueryTimeoutExceedException("Client timed out!")
    
        if (
            self.process.returncode != 0 or self.remove_trash_from_stderr(stderr)
        ) and not self.ignore_error:
>           raise QueryRuntimeException(
                "Client failed! Return code: {}, stderr: {}".format(
                    self.process.returncode, stderr
                ),
                self.process.returncode,
                stderr,
            )
E           helpers.client.QueryRuntimeException: Client failed! Return code: 210, stderr: Code: 210. DB::NetException: Net Exception: No route to host (172.16.1.2:9000). (NETWORK_ERROR)

helpers/client.py:238: QueryRuntimeException