-------- Original-Nachricht -------- Datum: Fri, 25 May 2007 12:44:50 -0400 Von: "David Weintraub" <[EMAIL PROTECTED]> An: "Ant Users List" <user@ant.apache.org> Betreff: Re: Parallel tasks and Windows
> Wonder if this has to do with the fact that Windows cannot spawn a new > process. Windows can only spawn new threads, and I wonder if there is > something either in your Java startup or your Ant startup script that > limits the number of threads to two. No, if I use parallel with 4 threads then I can start 4 processes. After closing two, the next two are opened. (Haven't checked if ant always behaves this way.) The processes were started from a DOS shell. I wonder if anything has changed with Java 1.5 and ant 1.7? Half a year ago with java 1.4/ant 1.65, the behaviour was inconsistent - with 4 processes and two threads, sometimes closing one process would result in a new process (roughly half of the time, probably depending on which process was spawned first). Today I always had to close both applications in order to get the next two. Regards, Thomas > > On 5/25/07, Thomas Voigt <[EMAIL PROTECTED]> wrote: > > Hi, > > > > I posed this question some time ago, but did not get any answers. I > thought after half a year (and unfortunately no new insights) I'd try again, > because this behaviour seriously prolongs our build time :-\ > > > > I stumbled upon a curious problem with the ant parallel handling in > conjunction with Windows XP. > > > > Let's say I have 3 targets: call1, call2 and call3 which are executed in > a parallel environment (2 threads). Each target calls a hello world > windows GUI application that has to be closed manually and prints an exit > confirmation afterwards. Ant starts call1 and call2 correctly in parallel. > Now the > curious thing is that ant will sometimes (not always) wait for _both_ > tasks to end before it starts the third task. No output is written until both > tasks are finished. > > > > The problem is not limited to GUI applications, we have the same > behaviour if we call the VS2005 C++ compiler :-( > > > > We tried to reproduce the problem by replacing the hello world calls > with various ant sleep commands, but this seemed to work fine, the third task > is always started immediately after one of the first two tasks exits. > > > > Any insights? > > > > Regards, Thomas > > > > -- > > GMX FreeMail: 1 GB Postfach, 5 E-Mail-Adressen, 10 Free SMS. > > Alle Infos und kostenlose Anmeldung: http://www.gmx.net/de/go/freemail > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > -- > -- > David Weintraub > [EMAIL PROTECTED] > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] -- Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kanns mit allen: http://www.gmx.net/de/go/multimessenger --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
