我正在使用一个在Java中调用System.loadLibrary()的库来加载一些本地代码，这些代码被编译为具有.so扩展名的C共享库。没有什么重要的，我以前做过并且有效（在Android和Mac OS X上）。
我遇到的问题是，在Raspberry Pi（Raspbian Distrobution）上运行时，java应用程序无法加载.so文件。
为什么会这样，导致它失败的原因以及如何解决。
为清楚起见：
linux-arm LD_LIBRARY_PATH和java.library.path但没有成功更新1：
正如pcarter建议的那样，我尝试过使用-verbose:jni。似乎没有任何错误，但请看这个输出：
[Dynamic-linking native method java.lang.Object.registerNatives ... JNI]
[Registering JNI native method java.lang.Object.hashCode]
[Registering JNI native method java.lang.Object.wait]
[Registering JNI native method java.lang.Object.notify]
[Registering JNI native method java.lang.Object.notifyAll]
[Registering JNI native method java.lang.Object.clone]
[Dynamic-linking native method java.lang.System.registerNatives ... JNI]
[Registering JNI native method java.lang.System.currentTimeMillis]
[Registering JNI native method java.lang.System.nanoTime]
[Registering JNI native method java.lang.System.arraycopy]
[Dynamic-linking native method java.lang.Thread.registerNatives ... JNI]
[Registering JNI native method java.lang.Thread.start0]
[Registering JNI native method java.lang.Thread.stop0]
[Registering JNI native method java.lang.Thread.isAlive]
[Registering JNI native method java.lang.Thread.suspend0]
[Registering JNI native method java.lang.Thread.resume0]
[Registering JNI native method java.lang.Thread.setPriority0]
[Registering JNI native method java.lang.Thread.yield]
[Registering JNI native method java.lang.Thread.sleep]
[Registering JNI native method java.lang.Thread.currentThread]
[Registering JNI native method java.lang.Thread.countStackFrames]
[Registering JNI native method java.lang.Thread.interrupt0]
[Registering JNI native method java.lang.Thread.isInterrupted]
[Registering JNI native method java.lang.Thread.holdsLock]
[Registering JNI native method java.lang.Thread.getThreads]
[Registering JNI native method java.lang.Thread.dumpThreads]
[Registering JNI native method java.lang.Thread.setNativeName]
[Dynamic-linking native method java.security.AccessController.getStackAccessControlContext ... JNI]
[Dynamic-linking native method java.security.AccessController.getInheritedAccessControlContext ... JNI]
[Dynamic-linking native method java.lang.Class.registerNatives ... JNI]
[Registering JNI native method java.lang.Class.getName0]
[Registering JNI native method java.lang.Class.getSuperclass]
[Registering JNI native method java.lang.Class.getInterfaces0]
[Registering JNI native method java.lang.Class.getClassLoader0]
[Registering JNI native method java.lang.Class.isInterface]
[Registering JNI native method java.lang.Class.getSigners]
[Registering JNI native method java.lang.Class.setSigners]
[Registering JNI native method java.lang.Class.isArray]
[Registering JNI native method java.lang.Class.isPrimitive]
[Registering JNI native method java.lang.Class.getComponentType]
[Registering JNI native method java.lang.Class.getModifiers]
[Registering JNI native method java.lang.Class.getDeclaredFields0]
[Registering JNI native method java.lang.Class.getDeclaredMethods0]
[Registering JNI native method java.lang.Class.getDeclaredConstructors0]
[Registering JNI native method java.lang.Class.getProtectionDomain0]
[Registering JNI native method java.lang.Class.getDeclaredClasses0]
[Registering JNI native method java.lang.Class.getDeclaringClass0]
[Registering JNI native method java.lang.Class.getGenericSignature0]
[Registering JNI native method java.lang.Class.getRawAnnotations]
[Registering JNI native method java.lang.Class.getConstantPool]
[Registering JNI native method java.lang.Class.desiredAssertionStatus0]
[Registering JNI native method java.lang.Class.getEnclosingMethod0]
[Registering JNI native method java.lang.Class.getRawTypeAnnotations]
[Dynamic-linking native method java.lang.ClassLoader.registerNatives ... JNI]
[Registering JNI native method java.lang.ClassLoader.retrieveDirectives]
[Dynamic-linking native method java.security.AccessController.doPrivileged ... JNI]
[Dynamic-linking native method java.lang.Class.getPrimitiveClass ... JNI]
[Dynamic-linking native method java.lang.Float.floatToRawIntBits ... JNI]
[Dynamic-linking native method java.lang.Double.doubleToRawLongBits ... JNI]
[Dynamic-linking native method java.lang.Double.longBitsToDouble ... JNI]
[Dynamic-linking native method java.lang.System.initProperties ... JNI]
[Dynamic-linking native method sun.misc.VM.initialize ... JNI]
[Dynamic-linking native method sun.misc.Unsafe.registerNatives ... JNI]
[Registering JNI native method sun.misc.Unsafe.getObject]
[Registering JNI native method sun.misc.Unsafe.putObject]
[Registering JNI native method sun.misc.Unsafe.getObjectVolatile]
[Registering JNI native method sun.misc.Unsafe.putObjectVolatile]
[Registering JNI native method sun.misc.Unsafe.getBoolean]
[Registering JNI native method sun.misc.Unsafe.putBoolean]
[Registering JNI native method sun.misc.Unsafe.getBooleanVolatile]
[Registering JNI native method sun.misc.Unsafe.putBooleanVolatile]
[Registering JNI native method sun.misc.Unsafe.getByte]
[Registering JNI native method sun.misc.Unsafe.putByte]
[Registering JNI native method sun.misc.Unsafe.getByteVolatile]
[Registering JNI native method sun.misc.Unsafe.putByteVolatile]
[Registering JNI native method sun.misc.Unsafe.getShort]
[Registering JNI native method sun.misc.Unsafe.putShort]
[Registering JNI native method sun.misc.Unsafe.getShortVolatile]
[Registering JNI native method sun.misc.Unsafe.putShortVolatile]
[Registering JNI native method sun.misc.Unsafe.getChar]
[Registering JNI native method sun.misc.Unsafe.putChar]
[Registering JNI native method sun.misc.Unsafe.getCharVolatile]
[Registering JNI native method sun.misc.Unsafe.putCharVolatile]
[Registering JNI native method sun.misc.Unsafe.getInt]
[Registering JNI native method sun.misc.Unsafe.putInt]
[Registering JNI native method sun.misc.Unsafe.getIntVolatile]
[Registering JNI native method sun.misc.Unsafe.putIntVolatile]
[Registering JNI native method sun.misc.Unsafe.getLong]
[Registering JNI native method sun.misc.Unsafe.putLong]
[Registering JNI native method sun.misc.Unsafe.getLongVolatile]
[Registering JNI native method sun.misc.Unsafe.putLongVolatile]
[Registering JNI native method sun.misc.Unsafe.getFloat]
[Registering JNI native method sun.misc.Unsafe.putFloat]
[Registering JNI native method sun.misc.Unsafe.getFloatVolatile]
[Registering JNI native method sun.misc.Unsafe.putFloatVolatile]
[Registering JNI native method sun.misc.Unsafe.getDouble]
[Registering JNI native method sun.misc.Unsafe.putDouble]
[Registering JNI native method sun.misc.Unsafe.getDoubleVolatile]
[Registering JNI native method sun.misc.Unsafe.putDoubleVolatile]
[Registering JNI native method sun.misc.Unsafe.getByte]
[Registering JNI native method sun.misc.Unsafe.putByte]
[Registering JNI native method sun.misc.Unsafe.getShort]
[Registering JNI native method sun.misc.Unsafe.putShort]
[Registering JNI native method sun.misc.Unsafe.getChar]
[Registering JNI native method sun.misc.Unsafe.putChar]
[Registering JNI native method sun.misc.Unsafe.getInt]
[Registering JNI native method sun.misc.Unsafe.putInt]
[Registering JNI native method sun.misc.Unsafe.getLong]
[Registering JNI native method sun.misc.Unsafe.putLong]
[Registering JNI native method sun.misc.Unsafe.getFloat]
[Registering JNI native method sun.misc.Unsafe.putFloat]
[Registering JNI native method sun.misc.Unsafe.getDouble]
[Registering JNI native method sun.misc.Unsafe.putDouble]
[Registering JNI native method sun.misc.Unsafe.getAddress]
[Registering JNI native method sun.misc.Unsafe.putAddress]
[Registering JNI native method sun.misc.Unsafe.allocateMemory]
[Registering JNI native method sun.misc.Unsafe.reallocateMemory]
[Registering JNI native method sun.misc.Unsafe.freeMemory]
[Registering JNI native method sun.misc.Unsafe.objectFieldOffset]
[Registering JNI native method sun.misc.Unsafe.staticFieldOffset]
[Registering JNI native method sun.misc.Unsafe.staticFieldBase]
[Registering JNI native method sun.misc.Unsafe.ensureClassInitialized]
[Registering JNI native method sun.misc.Unsafe.arrayBaseOffset]
[Registering JNI native method sun.misc.Unsafe.arrayIndexScale]
[Registering JNI native method sun.misc.Unsafe.addressSize]
[Registering JNI native method sun.misc.Unsafe.pageSize]
[Dynamic-linking native method java.lang.Throwable.fillInStackTrace ... JNI]
[Registering JNI native method sun.misc.Unsafe.getObject]
[Registering JNI native method sun.misc.Unsafe.putObject]
[Registering JNI native method sun.misc.Unsafe.getObjectVolatile]
[Registering JNI native method sun.misc.Unsafe.putObjectVolatile]
[Registering JNI native method sun.misc.Unsafe.getBoolean]
[Registering JNI native method sun.misc.Unsafe.putBoolean]
[Registering JNI native method sun.misc.Unsafe.getBooleanVolatile]
[Registering JNI native method sun.misc.Unsafe.putBooleanVolatile]
[Registering JNI native method sun.misc.Unsafe.getByte]
[Registering JNI native method sun.misc.Unsafe.putByte]
[Registering JNI native method sun.misc.Unsafe.getByteVolatile]
[Registering JNI native method sun.misc.Unsafe.putByteVolatile]
[Registering JNI native method sun.misc.Unsafe.getShort]
[Registering JNI native method sun.misc.Unsafe.putShort]
[Registering JNI native method sun.misc.Unsafe.getShortVolatile]
[Registering JNI native method sun.misc.Unsafe.putShortVolatile]
[Registering JNI native method sun.misc.Unsafe.getChar]
[Registering JNI native method sun.misc.Unsafe.putChar]
[Registering JNI native method sun.misc.Unsafe.getCharVolatile]
[Registering JNI native method sun.misc.Unsafe.putCharVolatile]
[Registering JNI native method sun.misc.Unsafe.getInt]
[Registering JNI native method sun.misc.Unsafe.putInt]
[Registering JNI native method sun.misc.Unsafe.getIntVolatile]
[Registering JNI native method sun.misc.Unsafe.putIntVolatile]
[Registering JNI native method sun.misc.Unsafe.getLong]
[Registering JNI native method sun.misc.Unsafe.putLong]
[Registering JNI native method sun.misc.Unsafe.getLongVolatile]
[Registering JNI native method sun.misc.Unsafe.putLongVolatile]
[Registering JNI native method sun.misc.Unsafe.getFloat]
[Registering JNI native method sun.misc.Unsafe.putFloat]
[Registering JNI native method sun.misc.Unsafe.getFloatVolatile]
[Registering JNI native method sun.misc.Unsafe.putFloatVolatile]
[Registering JNI native method sun.misc.Unsafe.getDouble]
[Registering JNI native method sun.misc.Unsafe.putDouble]
[Registering JNI native method sun.misc.Unsafe.getDoubleVolatile]
[Registering JNI native method sun.misc.Unsafe.putDoubleVolatile]
[Registering JNI native method sun.misc.Unsafe.getByte]
[Registering JNI native method sun.misc.Unsafe.putByte]
[Registering JNI native method sun.misc.Unsafe.getShort]
[Registering JNI native method sun.misc.Unsafe.putShort]
[Registering JNI native method sun.misc.Unsafe.getChar]
[Registering JNI native method sun.misc.Unsafe.putChar]
[Registering JNI native method sun.misc.Unsafe.getInt]
[Registering JNI native method sun.misc.Unsafe.putInt]
[Registering JNI native method sun.misc.Unsafe.getLong]
[Registering JNI native method sun.misc.Unsafe.putLong]
[Registering JNI native method sun.misc.Unsafe.getFloat]
[Registering JNI native method sun.misc.Unsafe.putFloat]
[Registering JNI native method sun.misc.Unsafe.getDouble]
[Registering JNI native method sun.misc.Unsafe.putDouble]
[Registering JNI native method sun.misc.Unsafe.getAddress]
[Registering JNI native method sun.misc.Unsafe.putAddress]
[Registering JNI native method sun.misc.Unsafe.allocateMemory]
[Registering JNI native method sun.misc.Unsafe.reallocateMemory]
[Registering JNI native method sun.misc.Unsafe.freeMemory]
[Registering JNI native method sun.misc.Unsafe.objectFieldOffset]
[Registering JNI native method sun.misc.Unsafe.staticFieldOffset]
[Registering JNI native method sun.misc.Unsafe.staticFieldBase]
[Registering JNI native method sun.misc.Unsafe.ensureClassInitialized]
[Registering JNI native method sun.misc.Unsafe.arrayBaseOffset]
[Registering JNI native method sun.misc.Unsafe.arrayIndexScale]
[Registering JNI native method sun.misc.Unsafe.addressSize]
[Registering JNI native method sun.misc.Unsafe.pageSize]
[Registering JNI native method sun.misc.Unsafe.defineClass]
[Registering JNI native method sun.misc.Unsafe.allocateInstance]
[Registering JNI native method sun.misc.Unsafe.monitorEnter]
[Registering JNI native method sun.misc.Unsafe.monitorExit]
[Registering JNI native method sun.misc.Unsafe.tryMonitorEnter]
[Registering JNI native method sun.misc.Unsafe.throwException]
[Registering JNI native method sun.misc.Unsafe.compareAndSwapObject]
[Registering JNI native method sun.misc.Unsafe.compareAndSwapInt]
[Registering JNI native method sun.misc.Unsafe.compareAndSwapLong]
[Registering JNI native method sun.misc.Unsafe.putOrderedObject]
[Registering JNI native method sun.misc.Unsafe.putOrderedInt]
[Registering JNI native method sun.misc.Unsafe.putOrderedLong]
[Registering JNI native method sun.misc.Unsafe.park]
[Registering JNI native method sun.misc.Unsafe.unpark]
[Registering JNI native method sun.misc.Unsafe.getLoadAverage]
[Registering JNI native method sun.misc.Unsafe.copyMemory]
[Registering JNI native method sun.misc.Unsafe.setMemory]
[Registering JNI native method sun.misc.Unsafe.defineAnonymousClass]
[Registering JNI native method sun.misc.Unsafe.shouldBeInitialized]
[Registering JNI native method sun.misc.Unsafe.loadFence]
[Registering JNI native method sun.misc.Unsafe.storeFence]
[Registering JNI native method sun.misc.Unsafe.fullFence]
[Dynamic-linking native method sun.reflect.Reflection.getCallerClass ... JNI]
[Dynamic-linking native method java.lang.String.intern ... JNI]
[Dynamic-linking native method java.lang.Object.getClass ... JNI]
[Dynamic-linking native method java.lang.Class.forName0 ... JNI]
[Dynamic-linking native method sun.reflect.Reflection.getClassAccessFlags ... JNI]
[Dynamic-linking native method sun.reflect.NativeConstructorAccessorImpl.newInstance0 ... JNI]
[Dynamic-linking native method java.lang.Runtime.maxMemory ... JNI]
[Dynamic-linking native method java.io.FileInputStream.initIDs ... JNI]
[Dynamic-linking native method java.io.FileDescriptor.initIDs ... JNI]
[Dynamic-linking native method java.io.FileOutputStream.initIDs ... JNI]
[Dynamic-linking native method java.security.AccessController.doPrivileged ... JNI]
[Dynamic-linking native method java.lang.System.setIn0 ... JNI]
[Dynamic-linking native method java.lang.System.setOut0 ... JNI]
[Dynamic-linking native method java.lang.System.setErr0 ... JNI]
[Dynamic-linking native method java.io.UnixFileSystem.initIDs ... JNI]
[Dynamic-linking native method java.lang.System.mapLibraryName ... JNI]
[Dynamic-linking native method java.lang.ClassLoader$NativeLibrary.findBuiltinLib ... JNI]
[Dynamic-linking native method java.io.UnixFileSystem.getBooleanAttributes0 ... JNI]
[Dynamic-linking native method java.io.UnixFileSystem.canonicalize0 ... JNI]
[Dynamic-linking native method java.lang.ClassLoader$NativeLibrary.load ... JNI]
[Dynamic-linking native method sun.misc.Signal.findSignal ... JNI]
[Dynamic-linking native method sun.misc.Signal.handle0 ... JNI]
[Dynamic-linking native method java.lang.Compiler.registerNatives ... JNI]
[Registering JNI native method java.lang.Compiler.compileClass]
[Registering JNI native method java.lang.Compiler.compileClasses]
[Registering JNI native method java.lang.Compiler.command]
[Registering JNI native method java.lang.Compiler.enable]
[Registering JNI native method java.lang.Compiler.disable]
[Dynamic-linking native method java.lang.Class.isAssignableFrom ... JNI]
[Dynamic-linking native method java.io.FileInputStream.open ... JNI]
[Dynamic-linking native method java.io.FileInputStream.readBytes ... JNI]
[Dynamic-linking native method java.io.FileInputStream.available ... JNI]
[Dynamic-linking native method java.lang.reflect.Array.newArray ... JNI]
[Dynamic-linking native method java.io.FileInputStream.close0 ... JNI]
[Dynamic-linking native method java.io.UnixFileSystem.list ... JNI]
[Dynamic-linking native method java.lang.Runtime.availableProcessors ... JNI]
[Dynamic-linking native method java.lang.invoke.MethodHandleNatives.registerNatives ... JNI]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.init]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.expand]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.resolve]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.getConstant]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.getNamedCon]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.getMembers]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.objectFieldOffset]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.setCallSiteTargetNormal]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.setCallSiteTargetVolatile]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.staticFieldOffset]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.staticFieldBase]
[Registering JNI native method java.lang.invoke.MethodHandleNatives.getMemberVMInfo]
[Registering JNI native method java.lang.invoke.MethodHandle.invoke]
[Registering JNI native method java.lang.invoke.MethodHandle.invokeExact]
[Dynamic-linking native method java.lang.ClassLoader$NativeLibrary.find ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.initIDs ... JNI]
[Dynamic-linking native method java.io.UnixFileSystem.getLastModifiedTime ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.open ... JNI]
[Dynamic-linking native method sun.misc.Perf.registerNatives ... JNI]
[Registering JNI native method sun.misc.Perf.attach]
[Registering JNI native method sun.misc.Perf.detach]
[Registering JNI native method sun.misc.Perf.createLong]
[Registering JNI native method sun.misc.Perf.createByteArray]
[Registering JNI native method sun.misc.Perf.highResCounter]
[Registering JNI native method sun.misc.Perf.highResFrequency]
[Dynamic-linking native method java.util.zip.ZipFile.getTotal ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.startsWithLOC ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getEntry ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getEntryFlag ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getEntryTime ... JNI]
[Dynamic-linking native method java.util.TimeZone.getSystemTimeZoneID ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getEntryCrc ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getEntrySize ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getEntryCSize ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getEntryMethod ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getEntryBytes ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.freeEntry ... JNI]
[Dynamic-linking native method java.util.zip.Inflater.initIDs ... JNI]
[Dynamic-linking native method java.util.zip.Inflater.init ... JNI]
[Dynamic-linking native method java.util.zip.Inflater.inflateBytes ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.read ... JNI]
[Dynamic-linking native method java.util.zip.Inflater.reset ... JNI]
[Dynamic-linking native method java.util.zip.Inflater.end ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.close ... JNI]
[Dynamic-linking native method java.lang.ClassLoader.findLoadedClass0 ... JNI]
[Dynamic-linking native method java.lang.ClassLoader.findBootstrapClass ... JNI]
[Dynamic-linking native method java.security.AccessController.doPrivileged ... JNI]
[Dynamic-linking native method java.util.jar.JarFile.getMetaInfEntryNames ... JNI]
[Dynamic-linking native method java.lang.Package.getSystemPackage0 ... JNI]
[Dynamic-linking native method java.lang.ClassLoader.defineClass1 ... JNI]
[Dynamic-linking native method sun.reflect.NativeMethodAccessorImpl.invoke0 ... JNI]
[Dynamic-linking native method java.security.AccessController.doPrivileged ... JNI]
[Dynamic-linking native method java.io.FileOutputStream.writeBytes ... JNI]
*** Loading hardcoded library
[Dynamic-linking native method java.lang.System.identityHashCode ... JNI]
[Dynamic-linking native method java.lang.Throwable.getStackTraceDepth ... JNI]
[Dynamic-linking native method java.lang.Throwable.getStackTraceElement ... JNI]
[Dynamic-linking native method java.lang.Class.isInstance ... JNI]
[Dynamic-linking native method java.util.concurrent.atomic.AtomicLong.VMSupportsCS8 ... JNI]
[Dynamic-linking native method java.lang.reflect.Proxy.defineClass0 ... JNI]
Working Directory = /home/pi/conor/JavaGo
关于确切的错误，请参阅以下内容：
消息正文已完整，请参阅this paste了解堆栈跟踪，但堆栈跟踪中的主要错误如下：
java.lang.UnsatisfiedLinkError: java.lang.UnsatisfiedLinkError: no jffi-1.2 in java.library.path
我想重申，我已使用-Djava.library.path和-DLD_LIBRARY_PATH相应地设置路径。
答案 0 :(得分：0)
我因为代码而回答。您可以使用它来查看 java.library.path
public class JavaLibPath {
public static void main(String[] args) {
String libPathProperty = System.getProperty("java.library.path");
System.out.println(libPathProperty);
}
}
然后检查是否可以在此路径中找到jffi-1.2或者无论如何它都在您的计算机上
https://examples.javacodegeeks.com/java-basics/java-library-path-what-is-it-and-how-to-use/说：
当Java应用程序使用 System.loadLibrary() 方法加载本机库时，将扫描java.library.path以查找指定的库。如果JVM无法检测到所请求的库，则会抛出 UnsatisfiedLinkError 。最后，本机库的使用使Java程序更依赖于平台，因为它需要存在特定的本机库。
更新：似乎 jffi默认情况下未安装在RPi上，请参阅此链接http://peterwawood.blogspot.de/2014/07/compling-jffi-on-raspberry-pi.html和此How to build JRuby 1.7.13 on Raspberry Pi with rbenv/ruby-build?