Re: Bug in wekaPython

Hi Steffen,

I’m not too sure I understand the problem. The package (and the server) cannot be used unless the package is installed by Weka’s package manager.

Cheers,
Mark.
On 9 Jun 2021, 4:04 AM +1200, Steffen Herbold <[email protected]>, wrote:
> Dear Devs,
>
> I think I found a bug in wekaPython. It seems like the py-path parameter
> is not always used as it should by the PythonServer.
>
> I encountered the problem in a batch system, in which I did not have the
> GUI and, therefore, did not use the package manager. Here is the
> problematic code:
>
>   private void launchServer(boolean startPython) throws IOException {
>     Thread acceptThread = startServerSocket();
>     int localPort = m_serverSocket.getLocalPort();
>
>     if (startPython) {
>       String serverScript =
> WekaPackageManager.PACKAGES_DIR.getAbsolutePath()
>         + File.separator + "wekaPython" + File.separator + "resources"
>         + File.separator + "py" + File.separator + "pyServer.py";
>       ProcessBuilder processBuilder = new ProcessBuilder(m_pythonCommand,
>         serverScript, "" + localPort, m_debug ? "debug" : "");
>       m_serverProcess = processBuilder.start();
>     }
>     try {
>       acceptThread.join();
>     } catch (InterruptedException e) {
>     }
>
>     checkLocalSocketAndCreateShutdownHook();
>   }
>
> The serverScript String ignores the py-path, which results in failures
> because the server cannot be started if there is no packages folder with
> the required ~/wekaPython/resources/py/* files.
>
> Best,
> Steffen
>
> --
> PD Dr. Steffen Herbold
> Institute of Computer Science, University of Goettingen
> Goldschmidtstraße 7, 37077 Göttingen, Germany
> mailto. [email protected]
> tel. +49 551 39-172037
>
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