JRELoadError

Sun Feb 1 16:42:31 UTC 2015

Just to clarify my post, I'm suggesting this is potentially the reason why
some canned java launchers may not be working with openjdk 1.7 + as opposed
to recommending using java 1.6.

As far as canned launchers go, I would recommend Oracle's FX Ant.  not only
does it embed java for you and create an application bundle , it creates a
package installer, also works for windows.

the FX:DEPLOY task constructs the launcher for your project

http://docs.oracle.com/javafx/2/deployment/javafx_ant_task_reference.htm

On Sat, Jan 31, 2015 at 7:49 PM, Mike Swingler <swingler at apple.com> wrote:

> Please search for the Java 7, 8, 9 JVM symbols before trying to find the
> Java 6 symbols. We are actively discouraging developers from using Apples
> Java SE 6, since it has been deprecated for almost 5 years, and will be
> unavailable for some future version of OS X. We want developers and users
> using the best/newest Java available, even if Apple's old one is installed.
>
> Thanks
> Mike Swingler
> Apple Inc.
>
> > On Jan 31, 2015, at 8:45 AM, Peter J Slack <pslack at wavedna.com> wrote:
> >
> > The Mac version JRE 1.6 uses different symbols than 1.7 and 1.8 for the 2
> > key functions used by a launcher to load and run JVM
> >
> > in order to remedy this I've searched both symbols in case one fails when
> > launching a JVM in my own launcher
> >
> > Launchers have to load the library into memory and then wrap 2 key
> > functions.  Apple names these functions differently
> >
> > here's a code snippet in C illustrating how I've adapted setting up to
> > launch the JVM by loading in memory, if the Apple naming fails I revert
> to
> > openjdk naming
> >
> > //first see if the apple naming is active
> > WRAPPED_JNI_CreateJavaVM my_JNI_CreateJavaVM = (WRAPPED_JNI_CreateJavaVM)
> > dlsym(handle,"JNI_CreateJavaVM_Impl");
> >
> > //we need to try the possibility that this is not Apple JVM where they
> > mangle the names by appending _impl
> >        if(my_JNI_CreateJavaVM == NULL){
> >
> >               //this is the case for openjdk 1.7 + where they use the
> > traditional symbols in jvm.dll
> > my_JNI_CreateJavaVM = (WRAPPED_JNI_CreateJavaVM)
> > dlsym(handle,"JNI_CreateJavaVM");
> >
> > }
> >
> > WRAPPED_JNI_GetCreatedJavaVMs my_JNI_GetCreatedJavaVMs =
> >
> (WRAPPED_JNI_GetCreatedJavaVMs)dlsym(handle,"JNI_GetCreatedJavaVMs_Impl");
> >
> > if(my_JNI_GetCreatedJavaVMs == NULL){
> > my_JNI_GetCreatedJavaVMs =
> > (WRAPPED_JNI_GetCreatedJavaVMs)dlsym(handle,"JNI_GetCreatedJavaVMs");
> > }
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > On Fri, Jan 30, 2015 at 8:43 PM, Michael Hall <mik3hall at gmail.com>
> wrote:
> >
> >> On Jan 30, 2015, at 4:00 PM, Emmanuel Puybaret <puybaret at eteks.com>
> wrote:
> >>
> >>> Hi,
> >>>
> >>> I developed a sandboxed version of Sweet Home 3D that comes with its
> own
> >> copy of JRE 7.
> >>> Miserably, a few users reported recently that they got a "JRELoadError"
> >> when they launch the application.
> >>> I tried to update from JRE 7u72 to JRE 7u76, tried to replace
> >> JavaAppLauncher by the launcher generated by javafxpackager,  and also
> >> tried to replace the JRE 7 copy by a JRE 8 copy, but these users
> reported
> >> to me it didn't fix this issue.
> >>>
> >>> Would have any of you encounter this problem and/or have an idea how to
> >> fix it?
> >>
> >> A number of apps seem to have had the issue if you search on the subject
> >> error.
> >> This post….
> >>
> >>
> >>
> http://jedit.9.x6.nabble.com/jEdit-users-JRELoadError-launching-jEdit-5-2pre1-after-mavericks-upgrade-but-no-java-version-or-JAVAe-td5005300.html
> >>
> >> had a lot of mail list noise but ended up with some valid enough
> >> suggestions as to what the possible conflicts might be.
> >> Use of JAVA_HOME
> >> conflicting with the browser installed JRE version
> >> some sort of embedded symlink back to an apple JRE
> >> the possibilities that I remember.
> >> It suggested a work around of using a 3rd party package for running an
> app
> >> configuration that would work with both Apple and Oracle JRE’s.
> >> There might be some information of use to you in that one. There were a
> >> number of apps that appeared to have the issue.
> >>
> >> Michael Hall
> >>
> >> trz nio.2 for OS X http://www195.pair.com/mik3hall/index.html#trz
> >>
> >> HalfPipe Java 6/7 shell app
> >> http://www195.pair.com/mik3hall/index.html#halfpipe
> >>
> >> AppConverter convert Apple jvm to openjdk apps
> >> http://www195.pair.com/mik3hall/index.html#appconverter
> >>
> >>
> >>
> >>
> >>
> >
> >
> > --
> > Senior Software Developer / IT Administrator
> > Work:  (416) 466-9283
> > Fax  :  (866) 855-2605
> >
> > <http://www.wavedna.com/>
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>
>

-- 
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Work:  (416) 466-9283
Fax  :  (866)  855-2605

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