[gdal-dev] JRE vs JDK

[Ivan Lucena]

Hi there,

I am getting this exception when loading gdal.jar:

*
Native library load failed.
java.lang.UnsatisfiedLinkError: org.gdal.gdal.gdalJNI.HasThreadSupport()I
*

If I change the script that launch my application to use the java.exe from 
the JDK instead of the JRE then the problem is gone. The problem is that users 
usually have only JRE. Right?

Anyway, It doesn't seems like there is nothing wrong with the GDAL built. I 
also try the same test with Tamas' binaries but got the same strange error.

An by looking at swig/include/java/*.i I can see that some of the loadLibrary 
would issue that message before the exception.

WARNING : GDAL should be compiled with thread support for safe execution in 
Java.

But I am not getting it. So the error must be coming from loading 
gdalconstjni.dll or osrjni.dll but not gdaljni.dll or ogrjni.dll

I haven't tried that with Linux but I will.

I search for java.lang.UnsatisfiedLinkError: 
org.gdal.gdal.gdalJNI.HasThreadSupport()I on the web there are a hand full of 
question about that but none of the suggestions mentioned the JRE vs JDK issue.

Does anybody has a clue?

Regards,

Ivan
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Re: [gdal-dev] JRE vs JDK

[Even Rouault]

Le vendredi 26 octobre 2012 17:52:18, Ivan Lucena a écrit :
 Hi there,
 
 I am getting this exception when loading gdal.jar:
 
 *
 Native library load failed.
 java.lang.UnsatisfiedLinkError: org.gdal.gdal.gdalJNI.HasThreadSupport()I
 *
 
 If I change the script that launch my application to use the java.exe
 from the JDK instead of the JRE then the problem is gone. The problem is
 that users usually have only JRE. Right?
 
 Anyway, It doesn't seems like there is nothing wrong with the GDAL built. I
 also try the same test with Tamas' binaries but got the same strange
 error.
 
 An by looking at swig/include/java/*.i I can see that some of the
 loadLibrary would issue that message before the exception.
 
 WARNING : GDAL should be compiled with thread support for safe execution
 in Java.
 
 But I am not getting it. So the error must be coming from loading
 gdalconstjni.dll or osrjni.dll but not gdaljni.dll or ogrjni.dll
 
 I haven't tried that with Linux but I will.
 
 I search for java.lang.UnsatisfiedLinkError:
 org.gdal.gdal.gdalJNI.HasThreadSupport()I on the web there are a hand
 full of question about that but none of the suggestions mentioned the JRE
 vs JDK issue.
 
 Does anybody has a clue?

I'm a bit skeptical about this being a JRE vs JDK issue. I suspect that you 
have an issue with the supporting dll (the 4 jni ones and gdalXXX.dll and its 
dependencies) not being found in the PATH.

I've just tried with an older release-1500-dev.zip from Tamas site and a JRE. 

I put gdalinfo.class (compiled from the samples in swig/java/apps) in C:
\release-1500-dev\release-1500\bin\gdal\java

And then, after calling SDKShell.bat, just run from there :

C:\release-1500-dev\release-1500\bin\gdal\javajava -cp gdal.jar;. gdalinfo

Seems to work.

Regards,

Even
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