Joe Au created HADOOP-10063: ------------------------------- Summary: RunJar ClassLoader cached the class can't release Key: HADOOP-10063 URL: https://issues.apache.org/jira/browse/HADOOP-10063 Project: Hadoop Common Issue Type: Improvement Components: util Affects Versions: 2.2.0, 1.0.3 Reporter: Joe Au
At the end of method main() {code:title=RunJar.java|borderStyle=solid} ClassLoader loader = new URLClassLoader(classPath.toArray(new URL[0])); Thread.currentThread().setContextClassLoader(loader); Class<?> mainClass = Class.forName(mainClassName, true, loader); Method main = mainClass.getMethod("main", new Class[] { Array.newInstance(String.class, 0).getClass() }); String[] newArgs = Arrays.asList(args) .subList(firstArg, args.length).toArray(new String[0]); try { main.invoke(null, new Object[] { newArgs }); } catch (InvocationTargetException e) { throw e.getTargetException(); } {code} The ClassLoader cached the class can't release.Because the development time code will often changes, so will be very inconvenient. Rewrite as follows: {code:title=RunJar.java|borderStyle=solid} ClassLoader prevCl = Thread.currentThread().getContextClassLoader(); ClassLoader loader = new URLClassLoader(classPath.toArray(new URL[0]), prevCl); try { Thread.currentThread().setContextClassLoader(loader); Class<?> mainClass = Class.forName(mainClassName, true, loader); Method main = mainClass.getMethod("main", new Class[] { Array .newInstance(String.class, 0).getClass() }); String[] newArgs = Arrays.asList(args).subList(firstArg, args.length) .toArray(new String[0]); main.invoke(null, new Object[] { newArgs }); } catch (InvocationTargetException e) { throw e.getTargetException(); } finally { // Restore Thread.currentThread().setContextClassLoader(prevCl); } {code} -- This message was sent by Atlassian JIRA (v6.1#6144)