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From galaxy <tian.gal...@gmail.com>
Subject Re: About harmony running felix
Date Fri, 03 Jul 2009 03:25:15 GMT
Sure ´╝îThanks

2009/7/1 Tim Ellison <t.p.ellison@gmail.com>

> Ah, not to worry, I figured out the test case and have a fix.
>
> https://issues.apache.org/jira/browse/HARMONY-6254
>
> Please check if this fixes the problem for you.
>
> Regards,
> Tim
>
> Tim Ellison wrote:
> > Karl,
> >
> > You didn't provide a walkback (that I saw).
> >
> > Is the exception thrown on line 309 of java.net.URLStreamHandler?
> > That's the only place that I see our code assuming that the file part is
> > not null, which is an incorrect assumption since the URL code handles
> > null file parts ok.
> >
> > I searched for some way to create a URL with a null file part, but I'm
> > struggling...
> >
> > Regards,
> > Tim
> >
> > Karl Pauls wrote:
> >> I can try but I'm not sure whether I have the time. Thing is, we do
> >> pretty strange stuff in felix to support the OSGi spec in regard to
> >> URLStreamHandlers. It might very well be possible that in most cases
> >> the comment is right and the file part of a URL will not be null but
> >> an empty string however, in our case its not and that is kind of
> >> proving it wrong :-)
> >>
> >> I'll look into creating a testcase but at any rate, for now, I'm going
> >> to add a workaround in felix that catches the NPE and does the same
> >> that URLStreamHandler.toExternalForm() does in harmony just assuming
> >> that URL.getFile() might return null. Already tested it and that makes
> >> it work without any problems.
> >>
> >> regards,
> >>
> >> Karl
> >>
> >> On Tue, Jun 16, 2009 at 12:12 PM, Davanum Srinivas<davanum@gmail.com>
> wrote:
> >>> Karl,
> >>>
> >>> Can you please JIRA-it with a stripped down test case?
> >>>
> >>> thanks,
> >>> dims
> >>>
> >>> On 06/16/2009 04:19 AM, Karl Pauls wrote:
> >>>> Thanks, I did figure that one out already. Sorry for the noise (the
> >>>> difficulty was just to get it to work with eclipse running on my mac
> >>>> and harmony inside windows on virtual box :-).
> >>>>
> >>>> I now can see what is going on and I do think it is a bug in harmony.
> >>>> I might be able to workaround it in felix for the time being but the
> >>>> issue is this:
> >>>>
> >>>> URLStreamHandler.toExternalForm() does assume that the url has a file
> >>>> part and that it is not null (there is even a comment saying so). I
> >>>> think that is not a valid assumption and in this case it is what is
> >>>> causing the problem. We do a toExternalForm on a url that has only the
> >>>> schema set (not the file part). In this case the
> >>>> URLStreamHandler.toExternalForm() is using the result of a call to
> >>>> URL.getFile() without checking whether it is null or not and
> >>>> subsequently, is throwing a NPE. That doesn't happen on sun and is the
> >>>> problem for felix.
> >>>>
> >>>> regards,
> >>>>
> >>>> Karl
> >>>>
> >>>> On Tue, Jun 16, 2009 at 5:52 AM, Nathan Beyer<nbeyer@gmail.com>
>  wrote:
> >>>>> On Mon, Jun 15, 2009 at 3:42 AM, Karl Pauls<karlpauls@gmail.com>
>  wrote:
> >>>>>> Already did. Doesn't fix it.
> >>>>>>
> >>>>>> We do quite some magic in regard to the URLHandlers inside felix
so
> >>>>>> I'm not surprised that we run into some issues on harmony but
this
> one
> >>>>>> is odd as it seems to get down to an NPE inside URL.class at
a place
> >>>>>> where this just doesn't seem possible with the current trunk.
> Granted,
> >>>>>> due to the magic it isn't that clear that this is the real problem.
> It
> >>>>>> might be just a side-effect. Is there a way to hook-up harmony
to
> the
> >>>>>> eclipse debugger (i.e., have felix run on top of harmony and
connect
> a
> >>>>>> normal remote debugger)?
> >>>>> It should work just like any other remote process debug. Just launch
> >>>>> Felix+Harmony with the standard debug options to listen on a socket
> >>>>> and suspend on startup, then connect to it from Eclipse.
> >>>>>
> >>>>> -Nathan
> >>>>>> regards,
> >>>>>>
> >>>>>> Karl
> >>>>>>
> >>>>>> On Mon, Jun 15, 2009 at 12:24 AM, Nathan Beyer<nbeyer@gmail.com>
>  wrote:
> >>>>>>> Try out the latest milestone that just release last week
-
> >>>>>>> http://harmony.apache.org/download.cgi
> >>>>>>>
> >>>>>>> 5M10 should be pretty close to trunk right now.
> >>>>>>>
> >>>>>>> -Nathan
> >>>>>>>
> >>>>>>> On Sun, Jun 14, 2009 at 3:42 PM, Karl Pauls<karlpauls@gmail.com>
> >>>>>>>  wrote:
> >>>>>>>> Is it possible to download a build of the current trunk
somewhere?
> I'd
> >>>>>>>> like to look into this issue...
> >>>>>>>>
> >>>>>>>> regards,
> >>>>>>>>
> >>>>>>>> Karl
> >>>>>>>>
> >>>>>>>> On Tue, Jun 9, 2009 at 5:30 AM, Nathan Beyer<ndbeyer@apache.org>
> >>>>>>>>  wrote:
> >>>>>>>>> That's somewhat old. I don't suppose you could to
a fresh build
> from
> >>>>>>>>> HEAD and try again - at least a fresh build of the
classlib. The
> >>>>>>>>> change I'm thinking of probably isn't in the build
you're using.
> >>>>>>>>>
> >>>>>>>>> -Nathan
> >>>>>>>>>
> >>>>>>>>> On Mon, Jun 8, 2009 at 9:49 PM, galaxy<tian.galaxy@gmail.com>
>  wrote:
> >>>>>>>>>> It's , harmony-jre-761593,
> >>>>>>>>>>
> >>>>>>>>>> 2009/6/9 Nathan Beyer<ndbeyer@apache.org>
> >>>>>>>>>>
> >>>>>>>>>>> On Mon, Jun 8, 2009 at 12:46 AM, galaxy<tian.galaxy@gmail.com>
> >>>>>>>>>>>  wrote:
> >>>>>>>>>>>> Hi
> >>>>>>>>>>>> It's about running felix in harmony
.When we run felix in
> harmony
> >>>>>>>>>>>> with
> >>>>>>>>>>> the
> >>>>>>>>>>>> felix-cache there , it's OK.
> >>>>>>>>>>>> But there will be errors when running
without the felix-cache
> >>>>>>>>>>>> .That means
> >>>>>>>>>>>> after deleting felix-cache , harmony
runtime fails to install
> >>>>>>>>>>>> the bundles set to be auto-installed
.While with sun jdk ,it
> runs
> >>>>>>>>>>>> well
> >>>>>>>>>>> .That
> >>>>>>>>>>>> is to say harmony runtime is only able
to find the cache dir
> which
> >>>>>>>>>>>> is
> >>>>>>>>>>>> specified by
> >>>>>>>>>>>> "felix.cache.rootdir" in the config.properties
file (mine is
> >>>>>>>>>>>> "felix.cache.rootdir=D:/JavaWorld/Felix")
but not the bundle
> which
> >>>>>>>>>>>> is the
> >>>>>>>>>>>> specified by "file:xxx.jar"
> >>>>>>>>>>>> Also the command  "install file:XXX.jar"
won't work .The erroe
> >>>>>>>>>>>> message is
> >>>>>>>>>>>> "[1]
> >>>>>>>>>>>>
> >>>>>>>>>>>> I did some search and found that the
it's related to the
> >>>>>>>>>>>> urlhandler
> >>>>>>>>>>> class.
> >>>>>>>>>>>> I think whenever referring to the "file:xxx.jar"
, the url
> fails
> >>>>>>>>>>>> to
> >>>>>>>>>>> locate
> >>>>>>>>>>>> the file .
> >>>>>>>>>>> What build of Harmony are you testing? Is
it a Milestone build?
> A
> >>>>>>>>>>> recent fix may address this issue, but it
hasn't made into a
> >>>>>>>>>>> published
> >>>>>>>>>>> build yet.
> >>>>>>>>>>>
> >>>>>>>>>>>> I think it's ours , not the felix's
problem , so I report it
> here.
> >>>>>>>>>>>>
> >>>>>>>>>>>> You may try this by deleting the felix-cache
directory in the
> >>>>>>>>>>>> working
> >>>>>>>>>>>> directory and run
> >>>>>>>>>>>> java -jar bin\felix.jar
> >>>>>>>>>>>> with harmony's and sun's respectively
.If you run sun's first
> and
> >>>>>>>>>>>> not
> >>>>>>>>>>>> deleting the cache afterwards , no error
.
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>> [1]
> >>>>>>>>>>>> java.net.MalformedURLException:
> java.lang.IllegalStateException:
> >>>>>>>>>>>> Stream
> >>>>>>>>>>>> handler
> >>>>>>>>>>>> unavailable due to: Stream handler unavailable
due to: null"
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>>
> >>>>>>>>>>>> --
> >>>>>>>>>>>> regards
> >>>>>>>>>>>> Tian
> >>>>>>>>>>>>
> >>>>>>>>>> --
> >>>>>>>>>> regards
> >>>>>>>>>> Tian
> >>>>>>>>>>
> >>>>>>>> --
> >>>>>>>> Karl Pauls
> >>>>>>>> karlpauls@gmail.com
> >>>>>>>>
> >>>>>> --
> >>>>>> Karl Pauls
> >>>>>> karlpauls@gmail.com
> >>>>>>
> >>>>
> >>
> >>
> >
>



-- 
regards
Tian

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