Re: [Jython-users] problem with jython and threads

[Charlie G. <cha...@gm...>]

On Thu, Nov 6, 2008 at 2:39 PM, ag356 <ge...@mi...> wrote:
>
> Hi. Can anyone tell me why the following does not work?
>
> == Begin
>
> import org.python.util.PythonInterpreter;
>
> public class test {
>
>  public static void main(String[] args) throws Exception {
>    for (int i = 0; i < 10; i++) {
>      new Thread () {
>        public void run () {
>          String code = "s = \"Hello " +
>            Thread.currentThread().getName() +
>            "\"\nb = unicode(s,\"utf-8\")\nprint b\n";
>          System.out.println("code:\n"+code);
>          PythonInterpreter interp = new PythonInterpreter();
>          interp.exec(code);
>        }
>      }.start();
>    }
>  }
>
> }
>
> == End
>
> I get "LookupError: no codec search functions registered: can't find
> encoding" for usually all but one of the threads. Sometimes two or three of
> them work.
>
> If I add "import encodings" to the beginning of the script then it works.

Looks like we're not synchronizing properly when initializing the
codec lookup in org.python.core.codecs.  I've opened
http://bugs.jython.org/issue1169 to track hunting this down.  I
imagine this is something we'll take care of before releasing 2.5, but
I'm not sure how long it will be before someone really takes a look at
it.

Charlie