Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
Geir Magnusson Jr wrote: Oliver Deakin wrote: Geir Magnusson Jr wrote: However, in our case, when I say exec never returns I mean exec() never returns. so you'd never actually get to do IO above, because you are hanging in exec(). Big difference, right? Certainly So I assume you agree? (Just want to make sure that I'm not missing something terribly important here...) Yes, that is a different case to what I was imagining (and what was on that page I linked). Seems that *I* was missing something important ;) - do you have a stack trace that gives more info for what each of the threads are doing? Could you attach it to the JIRA if you do please - Ive just tried running a cut down version of the test on my SLES9 machine and it exited fine, so it would be useful to have a trace from your machine to see what's happening. Done Thanks Regards, Oliver geir - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Oliver Deakin IBM United Kingdom Limited - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
Magnusson, Geir wrote: Could you send me the code for Process so I can see what's going on here? :) Process is a boring abstract type, I suspect that you want to look at SystemProcess [1] and the associated natives [2]. [1] http://svn.apache.org/viewvc/incubator/harmony/enhanced/classlib/trunk/modules/luni/src/main/java/org/apache/harmony/luni/internal/process/SystemProcess.java?view=markup [2] http://svn.apache.org/viewvc/incubator/harmony/enhanced/classlib/trunk/native-src/shared/luni/process.c?view=markup Regards, Tim -- Tim Ellison ([EMAIL PROTECTED]) IBM Java technology centre, UK. - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
thx - I've figured out what's going on... fork() is failing When I run eclipse w a big max heap, it fails. When it's default heap, it doesn't. I'd love to claim that it's Eclipe's fault, but clearly there's some ulimit thingy in Ubuntu. Anyway, I'm going to rework the natives so that fork failure results in an exception since I can make it happen. Stay tuned. geir Tim Ellison wrote: Magnusson, Geir wrote: Could you send me the code for Process so I can see what's going on here? :) Process is a boring abstract type, I suspect that you want to look at SystemProcess [1] and the associated natives [2]. [1] http://svn.apache.org/viewvc/incubator/harmony/enhanced/classlib/trunk/modules/luni/src/main/java/org/apache/harmony/luni/internal/process/SystemProcess.java?view=markup [2] http://svn.apache.org/viewvc/incubator/harmony/enhanced/classlib/trunk/native-src/shared/luni/process.c?view=markup Regards, Tim - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
This is now resolved. Waiting for squawks of protest before closing. Things to think about/do : 1) We need richer return codes from procimpl.c execProgram() for windows. 2) I'll find out what config on Ubuntu allowed this behavior (had fork() fail) and we should add a regression for it, and start doing more stress testing, as I wonder what else we'll find geir Geir Magnusson Jr wrote: And btw, thanks to Tim, Mark and Oliver for thinking about this problem... Geir Magnusson Jr wrote: thx - I've figured out what's going on... fork() is failing When I run eclipse w a big max heap, it fails. When it's default heap, it doesn't. I'd love to claim that it's Eclipe's fault, but clearly there's some ulimit thingy in Ubuntu. Anyway, I'm going to rework the natives so that fork failure results in an exception since I can make it happen. Stay tuned. geir Tim Ellison wrote: Magnusson, Geir wrote: Could you send me the code for Process so I can see what's going on here? :) Process is a boring abstract type, I suspect that you want to look at SystemProcess [1] and the associated natives [2]. [1] http://svn.apache.org/viewvc/incubator/harmony/enhanced/classlib/trunk/modules/luni/src/main/java/org/apache/harmony/luni/internal/process/SystemProcess.java?view=markup [2] http://svn.apache.org/viewvc/incubator/harmony/enhanced/classlib/trunk/native-src/shared/luni/process.c?view=markup Regards, Tim - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
I remember seeing problems like this before, in a non-Harmony jre, where a Runtime.exec() would never return. I hunted around and found an interesting page on JavaWorld: http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html I found the Why Runtime.exec() hangs section very useful, and it solved my problem at the time. I'm not saying that what you're seeing is definitely the same thing that I encountered, but it may help. I notice that in this test stdout and stderr for the process are not read - is it possible that it is producing some output, and since it isn't being read the process just waits leading to the exec never exiting? Regards, Oliver Geir Magnusson Jr (JIRA) wrote: [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06 --- Key: HARMONY-638 URL: http://issues.apache.org/jira/browse/HARMONY-638 Project: Harmony Type: Bug Components: Classlib Reporter: Geir Magnusson Jr it seems that exec() doesn't work - it never returns. Bug in IBM j9 kernel classes? Mark Hindress is trying to duplcate to reconfirm. ubuntu 6.06 gcc 3.4 invoked by Sun Java 1.5.0_07 IBM J9 for linux, v3 mk II -- Oliver Deakin IBM United Kingdom Limited - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
Oliver Deakin wrote: I remember seeing problems like this before, in a non-Harmony jre, where a Runtime.exec() would never return. I hunted around and found an interesting page on JavaWorld: http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html I found the Why Runtime.exec() hangs section very useful, and it solved my problem at the time. I'm not saying that what you're seeing is definitely the same thing that I encountered, but it may help. I notice that in this test stdout and stderr for the process are not read - is it possible that it is producing some output, and since it isn't being read the process just waits leading to the exec never exiting? I think the phrasing in the article is misleading, because we're not seeing exec() *return*, which is a different issue than the case that they are talking about, namely the subsequent waitFor() not returning. So I think this doesn't apply. Interesting reading, though. geir - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
The example returns once they have fixed it. If you look at the example just before the Why Runtime.exec() hangs heading (BadExecJava2.java) you will see a situation that is almost exactly the same as in the test case. i.e. an exec followed by a waitFor(), without any reading of streams. In this case the exec never returns. The later example is how to fix it. Regards, Oliver Geir Magnusson Jr wrote: Oliver Deakin wrote: I remember seeing problems like this before, in a non-Harmony jre, where a Runtime.exec() would never return. I hunted around and found an interesting page on JavaWorld: http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html I found the Why Runtime.exec() hangs section very useful, and it solved my problem at the time. I'm not saying that what you're seeing is definitely the same thing that I encountered, but it may help. I notice that in this test stdout and stderr for the process are not read - is it possible that it is producing some output, and since it isn't being read the process just waits leading to the exec never exiting? I think the phrasing in the article is misleading, because we're not seeing exec() *return*, which is a different issue than the case that they are talking about, namely the subsequent waitFor() not returning. So I think this doesn't apply. Interesting reading, though. geir - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Oliver Deakin IBM United Kingdom Limited - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
Oliver Deakin wrote: The example returns once they have fixed it. If you look at the example just before the Why Runtime.exec() hangs heading (BadExecJava2.java) you will see a situation that is almost exactly the same as in the test case. i.e. an exec followed by a waitFor(), without any reading of streams. In this case the exec never returns. The later example is how to fix it. I don't think so. When they are saying the exec never returns, they are meaning that from the POV of the programmer, the spawned thing never returns. That's why you can do exec() do IO waitFor() done However, in our case, when I say exec never returns I mean exec() never returns. so you'd never actually get to do IO above, because you are hanging in exec(). Big difference, right? geir - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
Geir Magnusson Jr wrote: Oliver Deakin wrote: The example returns once they have fixed it. If you look at the example just before the Why Runtime.exec() hangs heading (BadExecJava2.java) you will see a situation that is almost exactly the same as in the test case. i.e. an exec followed by a waitFor(), without any reading of streams. In this case the exec never returns. The later example is how to fix it. I don't think so. When they are saying the exec never returns, they are meaning that from the POV of the programmer, the spawned thing never returns. That's why you can do exec() do IO waitFor() done However, in our case, when I say exec never returns I mean exec() never returns. so you'd never actually get to do IO above, because you are hanging in exec(). Big difference, right? Certainly - do you have a stack trace that gives more info for what each of the threads are doing? Could you attach it to the JIRA if you do please - Ive just tried running a cut down version of the test on my SLES9 machine and it exited fine, so it would be useful to have a trace from your machine to see what's happening. Thanks, Oliver geir - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Oliver Deakin IBM United Kingdom Limited - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
Oliver Deakin wrote: Geir Magnusson Jr wrote: However, in our case, when I say exec never returns I mean exec() never returns. so you'd never actually get to do IO above, because you are hanging in exec(). Big difference, right? Certainly So I assume you agree? (Just want to make sure that I'm not missing something terribly important here...) - do you have a stack trace that gives more info for what each of the threads are doing? Could you attach it to the JIRA if you do please - Ive just tried running a cut down version of the test on my SLES9 machine and it exited fine, so it would be useful to have a trace from your machine to see what's happening. Done geir - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [jira] Created: (HARMONY-638) [classlib] Tests hang on in luni : tests.api.java.io.FileTest / test_setReadOnly on Ubunti 6.06
From: Oliver Deakin [mailto:[EMAIL PROTECTED] Geir Magnusson Jr wrote: Oliver Deakin wrote: The example returns once they have fixed it. If you look at the example just before the Why Runtime.exec() hangs heading (BadExecJava2.java) you will see a situation that is almost exactly the same as in the test case. i.e. an exec followed by a waitFor(), without any reading of streams. In this case the exec never returns. The later example is how to fix it. I don't think so. When they are saying the exec never returns, they are meaning that from the POV of the programmer, the spawned thing never returns. That's why you can do exec() do IO waitFor() done However, in our case, when I say exec never returns I mean exec() never returns. so you'd never actually get to do IO above, because you are hanging in exec(). Big difference, right? Certainly - do you have a stack trace that gives more info for what each of the threads are doing? Could you attach it to the JIRA if you do please - Ive just tried running a cut down version of the test on my SLES9 machine and it exited fine, so it would be useful to have a trace from your machine to see what's happening. Could you send me the code for Process so I can see what's going on here? :) Geir - Terms of use : http://incubator.apache.org/harmony/mailing.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
