Traceback (most recent call last):

  File "load_datas.py", line 23, in <module>

    trade = s.loadTextEx(

  File "/home/ps/miniconda3/lib/python3.8/site-packages/dolphindb/session.py", line 995, in loadTextEx

    self.run(tbl_str)

  File "/home/ps/miniconda3/lib/python3.8/site-packages/dolphindb/session.py", line 453, in run

    return self.cpp.run(script, *args, **kwargs)

RuntimeError: <Exception> in run: Server response: 'TMP_TBL_97f390a5 = loadTextEx(db, "pred", ["pred_time","stock_code"], "/home/zyw/db/dolphindb/data/test_pred_result_20220501_20221231_formal_part1.txt", , ) => Failed to lock [/home/ps/share/zyw/dolphindb/server/clusterDemo/data/dnode1/storage/CHUNKS/event/dolphindb.lock] with error : Bad file descriptor' script: 'TMP_TBL_97f390a5 = loadTextEx(db, "pred", ['pred_time', 'stock_code'], "/home/zyw/db/dolphindb/data/test_pred_result_20220501_20221231_formal_part1.txt", ,)'