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https://issues.apache.org/jira/browse/IGNITE-4920?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Alexei Scherbakov updated IGNITE-4920:
--------------------------------------
Fix Version/s: (was: 2.1)
2.0
> LocalDeploymentSpi resources cleanup on spi.register() might clean resources
> from other tasks using delegating classloader.
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: IGNITE-4920
> URL: https://issues.apache.org/jira/browse/IGNITE-4920
> Project: Ignite
> Issue Type: Bug
> Components: general
> Affects Versions: 1.6
> Reporter: Alexei Scherbakov
> Assignee: Alexei Scherbakov
> Fix For: 2.0
>
>
> Culrpit is "if" condition in LocalDelpoymentSpi:
> {noformat}
> if (entry.getKey().equals(entry.getValue()) && isResourceExist(ldr,
> entry.getKey()) &&
> !U.hasParent(clsLdrToIgnore, ldr) &&
> ldrRsrcs.remove(ldr, clsLdrRsrcs)) {
> ...
> }
> {noformat}
> and can be fixed by adding clsLdrRsrcs.containsKey(entry.getKey()):
> {noformat}
> if (entry.getKey().equals(entry.getValue()) && isResourceExist(ldr,
> entry.getKey()) &&
> !U.hasParent(clsLdrToIgnore, ldr) &&
> clsLdrRsrcs.containsKey(entry.getKey()) && ldrRsrcs.remove(ldr, clsLdrRsrcs))
> {
> ...
> }
> {noformat}
> Reproducer (might require multiple runs)
> {noformat}
> /** */
> public class Main {
> public static void main(String args[]) throws MalformedURLException,
> ClassNotFoundException {
> System.setProperty("IGNITE_CACHE_REMOVED_ENTRIES_TTL", "1");
> IgniteConfiguration cfg = new IgniteConfiguration();
> cfg.setPeerClassLoadingEnabled(true);
> TcpDiscoverySpi spi = new TcpDiscoverySpi();
> spi.setIpFinder(new TcpDiscoveryVmIpFinder(true));
> cfg.setDiscoverySpi(spi);
> final Ignite ignite = Ignition.start(cfg);
> final ClassLoader moduleClsLdr = Main.class.getClassLoader();
> final ClassLoader moduleCLImpl = new DelegateClassLoader(null,
> moduleClsLdr);
> for (int i = 0; i < 1000000; i++)
> try {
> Class clazz = moduleCLImpl.loadClass("Main$CallFunction");
> ignite.compute().call(
>
> (IgniteCallable)clazz.getDeclaredConstructor(ClassLoader.class).newInstance(moduleCLImpl)
> );
> }
> catch (Exception e) {
> e.printStackTrace();
> }
> System.out.println("Done");
> }
> public static class CallFunction implements IgniteCallable,
> GridPeerDeployAware {
> transient ClassLoader classLoader;
> public CallFunction(ClassLoader cls) {
> this.classLoader = cls;
> }
> public Object call() throws Exception {
> return null;
> }
> public Class<?> deployClass() {
> return this.getClass();
> }
> public ClassLoader classLoader() {
> return classLoader;
> }
> }
> public static class DelegateClassLoader extends ClassLoader {
> private ClassLoader delegateCL;
> public DelegateClassLoader(ClassLoader parent, ClassLoader
> delegateCL) {
> super(parent); // Parent doesn't matter.
> this.delegateCL = delegateCL;
> }
> @Override
> public URL getResource(String name) {
> return delegateCL.getResource(name);
> }
> @Override
> public Class<?> loadClass(String name) throws ClassNotFoundException {
> return delegateCL.loadClass(name);
> }
> }
> }
> {noformat}
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