Attempt to reload the library in case of UnsatisfiedLinkError

When an UnsatisfiedLinkError is thrown because the library was already
loaded in another classloader, run gc() to unload the unreachable
classloaders, and reload the library again.

Signed-off-by: Jason Feng <[email protected]>

jcl/src/java.base/share/classes/java/lang/System.java

@@ -1152,10 +1152,28 @@ public static void loadLibrary(String libName) {
 		smngr.checkLink(libName);
 	}
 /*[IF JAVA_SPEC_VERSION >= 15]*/
-	ClassLoader.loadLibrary(getCallerClass(), libName);
+	Class<?> callerClass = getCallerClass();
 /*[ELSE]*/
-	ClassLoader.loadLibraryWithClassLoader(libName, ClassLoader.callerClassLoader());
+	ClassLoader callerClassLoader = ClassLoader.callerClassLoader();
 /*[ENDIF] JAVA_SPEC_VERSION >= 15 */
+	try {
+/*[IF JAVA_SPEC_VERSION >= 15]*/
+		ClassLoader.loadLibrary(callerClass, libName);
+/*[ELSE]*/
+		ClassLoader.loadLibraryWithClassLoader(libName, callerClassLoader);
+/*[ENDIF] JAVA_SPEC_VERSION >= 15 */
+	} catch (UnsatisfiedLinkError ule) {
+		String errorMessage = ule.getMessage();
+		if ((errorMessage != null) && errorMessage.contains("already loaded in another classloader")) { //$NON-NLS-1$
+			// attempt to unload the classloader, and retry
+			gc();
+/*[IF JAVA_SPEC_VERSION >= 15]*/
+			ClassLoader.loadLibrary(callerClass, libName);
+/*[ELSE]*/
+			ClassLoader.loadLibraryWithClassLoader(libName, callerClassLoader);
+/*[ENDIF] JAVA_SPEC_VERSION >= 15 */
+		}
+	}
 }
 
 /**