String[] args = {"python3", pythonFile}; Process process = Runtime.getRuntime().exec(args); int exitValue = process.waitFor(); BufferedInputStream in = new BufferedInputStream(process.getInputStream()); BufferedInputStream err = new BufferedInputStream(process.getErrorStream()); BufferedReader inBr = new BufferedReader(new InputStreamReader(in)); BufferedReader errBr = new BufferedReader(new InputStreamReader(err)); String lineStr; while ((lineStr = inBr.readLine()) != null) { logger.info(lineStr); } while ((lineStr = errBr.readLine()) != null) { logger.error(lineStr); } inBr.close(); errBr.close(); in.close(); err.close();

Calling python code takes a long time to execute. It is estimated to take several hours, about five or six hours. If you execute the Python command directly in the shell alone, there will be no problem; however, if you use java to call python in this way, there will be a problem: after a while, python will have no output. My way to determine whether python is running is to continuously write files, and every once in a while, write files to the file system. If you enter the python command directly into the shell, it is normal. Java calls python. After more than three hours, no files are generated, but using htop to check, the thread is still there. The operating environment is ubuntu