JRELoadError

[Mike Swingler]

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
>> 
>> 
>> 
>> 
>> 
> 
> 
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