When i'm trying to load the .so file from the Java, i'm getting error like this.
Exception in thread "main" java.lang.UnsatisfiedLinkError: no yeslib.so in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1681)
at java.lang.Runtime.loadLibrary0(Runtime.java:840)
at java.lang.System.loadLibrary(System.java:1047)
at com.rct.micros.util.GetCustClass.getScratchCode(GetCustClass.java:76)
at com.rct.micros.util.GetCustClass.main(GetCustClass.java:39)
I have tried System.load(absoulte path) and System.loadLibrary(sofilename). Both are giving the same error. When i copy this so file into usr/lib/jvm package, it is working..
can anyone help how to get this solved using Java. i'm running on linux box.
It's possible that the library is on your path, but it can't be loaded for some other reason.
A trick I've used to debug problems like this is to run java -Xrunsofilename
-Xrun is the JVM option to load JVMPI libraries (the old profiling interface). If it succeeds, it will load the library and complain that it's not an agent library. But if it fails (hopefully!) it will print an error message. This is usually a more descriptive error message than what you get from the UnsatisfiedLinkError.
Related
I am trying to run a test file InspectVM from libguestfs library inorder to have accesss to a disk image in windows. However, I have the following errors on my console
run:
Exception in thread "main" java.lang.UnsatisfiedLinkError: no guestfs_jni in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1864)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1122)
at madjava.com.redhat.et.libguestfs.GuestFS.<clinit>(GuestFS.java:51)
at madjava.examples.InspectVM.main(InspectVM.java:30)
C:\Users\CyberSOFONET\AppData\Local\NetBeans\Cache\8.2\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 0 seconds)#
I searched allover the internet and find that I should set java.libraly.path pointing to location of the guestfs_jni. my major problem is that I do not have any file with that name guestfs_jni. Do I need to make one myself or can I find it somewhere. any kind of help is appriciated. am a newbie in JNI so I dont have much imformation on it
You're looking for a file called guestfs_jni.dll. Usually the native library comes with the jar file.
From http://libguestfs.org/guestfs-java.3.html:
Libguestfs for Java is a Java Native Interface (JNI) extension, supplied in three parts: libguestfs.jar, libguestfs-VERSION.jar, libguestfs_jni.so, libguestfs.so
So the distribution comes with libguest_jni.so which ist for Linux and not for Windows. IIRC, there is no libguestfs for Windows. So you would first have to find out if it is even possible to compile libguestfs using Cygwin and if yes build it yourself.
If you're on Windows 10 you could try installing libguestfs and a Java runtime for the Linux subsystem and run inside the subsystem.
I am trying to resolve this error that I keep getting:
java.lang.UnsatisfiedLinkError: no cplex1262 in java.library.path
java.library.path must point to the directory containing the CPLEX shared library
try invoking java with java -Djava.library.path=...
Exception in thread "main" java.lang.UnsatisfiedLinkError: ilog.cplex.Cplex.CPXopenCPLEX([I)J
at ilog.cplex.Cplex.CPXopenCPLEX(Native Method)
at ilog.cplex.CplexI.init(CplexI.java:5722)
at ilog.cplex.CplexI.(CplexI.java:611)
at ilog.cplex.IloCplex.(IloCplex.java:10384)
I am using maven with java and I am trying to call cplex library. I think something needs to change in the pom file but i dont know what. Please help. Thanks.
One possible cause for could be your dll being in 32 or 64 bits and your java being in the opposite architecture.
Try verifying that your java and cplex.dll match. I got this information from the below post UnsatisfiedLinkError, despite setting Djava.library.path variable
When using the Java Attach API, I'm getting the following link error on Linux (tried it on different machines) only:
Exception in thread "main" java.lang.UnsatisfiedLinkError: sun.tools.attach.WindowsAttachProvider.tempPath()Ljava/lang/String;
at sun.tools.attach.WindowsAttachProvider.tempPath(Native Method)
at sun.tools.attach.WindowsAttachProvider.isTempPathSecure(WindowsAttachProvider.java:74)
at sun.tools.attach.WindowsAttachProvider.listVirtualMachines(WindowsAttachProvider.java:58)
at com.sun.tools.attach.VirtualMachine.list(VirtualMachine.java:134)
at sun.tools.jconsole.LocalVirtualMachine.getAttachableVMs(LocalVirtualMachine.java:151)
at sun.tools.jconsole.LocalVirtualMachine.getAllVirtualMachines(LocalVirtualMachine.java:110)
...
Interestingly, on Solaris and Windows it's working out of the box.
I tried out several combinations of specifying java.library.path to point to the directory which contains the libattach.so but with no luck.
What's wrong here?
And as a bonus question: Is there a way to see which native library is actually bound to a java class?
Different AttachProvider are used on different platforms. On Linux, it shouldn't use sun.tools.attach.WindowsAttachProvider. It is for Windows.
[solaris] sun.tools.attach.SolarisAttachProvider
[windows] sun.tools.attach.WindowsAttachProvider
[linux] sun.tools.attach.LinuxAttachProvider
This is configured in a resource file META-INF\services\com.sun.tools.attach.spi.AttachProvider (typically this file exists in tools.jar). It will search CLASSPATH to get first occurrence of this resource file and read the AttachProvider implementation class from it.
So you can probably resolve this problem by search sun.tools.attach.WindowsAttachProvider in your CLASSPATH. Possibly you have included a tools.jar from Windows.
We have coded and run a dynamic web application using MAPSERVER(Version 6.0.1) on windows platform using Java Technology. Now, there is need of deploying it on Ubuntu 11.10. We have installed Apache Tomcat 6.0, Mapserver 6.0.1, Apache 2.0, and FWTools-2.0.1(As this package contain all required tools for mapserver if I am not wrong, so I didn't feel any other tools to be installed). We have deployed the war file(and put application without) in Apache Tomcat 's Webapps folder. I even got the index page which dont have code related with mapscript api. But while fetching the other servlet with mapscript we are getting following error...
java.lang.UnsatisfiedLinkError: no mapscript in java.library.path
java.lang.ClassLoader.loadLibrary(ClassLoader.java:1681)
java.lang.Runtime.loadLibrary0(Runtime.java:840)
java.lang.System.loadLibrary(System.java:1047)
edu.umn.gis.mapscript.mapscriptJNI.<clinit>(mapscriptJNI.java:23)
edu.umn.gis.mapscript.mapObj.<init>(mapObj.java:283)
Again while refreshing the browser page where the above error was displayed, I got a change,
java.lang.NoClassDefFoundError: Could not initialize class
edu.umn.gis.mapscript.mapscriptJNI
edu.umn.gis.mapscript.mapObj.<init>(mapObj.java:283)
I searched on net about the above problem. But finally blank. Please, provide idea about the above problem.
I'm not going to explain why you're getting the UnsatisfiedLinkError, but instead I'll explain why you are getting the NoClassDefFoundError when you reload the page.
A NoClassDefFoundError with a message Could not initialize class ... is thrown by the JVM when it attempts to initialize a class that it has already tried and failed to initialize.
The first of your two stacktraces contains the line
edu.umn.gis.mapscript.mapscriptJNI.<clinit>(mapscriptJNI.java:23)
The method name <clinit> denotes the static initializer, of the class mapscriptJNI. So, at the point that the UnsatisfiedLinkError was thrown, the JVM was trying to initialize this class. Looking at the error message, it seems that this static initializer tried to load the native code library mapscript but failed.
This UnsatisfiedLinkError causes the mapscriptJNI class to fail to initialize successfully. The JVM keeps a record of all classes that fail to initialize, and if you attempt to initialize one of those classes again, you'll get a NoClassDefFoundError with a message saying that it could not initialize that class.
When you refresh the page, you end up causing the JVM to attempt to initialize the class mapscriptJNI a second time. Of course, this class failed to initialize the previous time. Your second stacktrace contains exactly the error I've described.
In short, the UnsatisfiedLinkError is the real error here. Fix that and the other one will go away.
I would check the following 2 items:
Is the mapscript.jar file on Tomcat or at least your webapp's classpath? (NoClassDefFoundError is your big clue here)
Is the libmapscript.so on either your LD_LIBRARY_PATH or -Djava.library.path? (UnsatisfiedLinkError since the shared object cannot be found)
Try having a look at this post, near the Running Java Mapscript (on Linux) section.
Hope that helps!
I am attempting to get SimpleARToolKit in the Processing.org IDE on my Mac. I have downloaded the SimpleARToolKit and JMyron files. I was getting some JMyron errors, but I moved the Library files and now those errors have gone away. The problem I am having now is when I try to run demo01.pde from the SimpleARToolKit, I get an error that says:
UnsatisfiedLinkError: no JARToolKit in java.library.path Exception in
thread "Animation Thread" java.lang.UnsatisfiedLinkError: no
JARToolKit in java.library.path at
java.lang.ClassLoader.loadLibrary(ClassLoader.java:1754) at
java.lang.Runtime.loadLibrary0(Runtime.java:823) at
java.lang.System.loadLibrary(System.java:1045) at
net.sourceforge.jartoolkit.core.JARToolKit.(JARToolKit.java:40)
at pARToolKit.SimpleARToolKit.(SimpleARToolKit.java:36) at
demo01.setup(demo01.java:44) at
processing.core.PApplet.handleDraw(PApplet.java:1608) at
processing.core.PApplet.run(PApplet.java:1530) at
java.lang.Thread.run(Thread.java:680)
The demo is crashing on this line:
ar = new SimpleARToolKit(this, capWidth, capHeight);
I have found a few other websites that seem to be asking the same question, but none of them are in English and through using Google Translate, none of them seem to resolve the issue.
Update:
This is not yet resolved but I have an update:
I found jARToolKit on SourceForge.net
Inside the jARToolKit.zip folder I found jARToolKit.jar file and copied it to my Mac/Library/Java/Extensions/ folder
Now when I run the code, the error says "no jartoolkit in java.library.path" (note the lowercase "jartoolkit") - as opposed to the original "no JARToolKit in java.library.path". If I remove the .jar file from the Extensions folder, the original error appears again, so this makes me think that I am on the right track, but still missing something.