| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.flink.core.fs; |
| |
| import org.apache.flink.core.testutils.CheckedThread; |
| import org.apache.flink.util.AbstractCloseableRegistry; |
| import org.apache.flink.util.ExceptionUtils; |
| |
| import org.junit.After; |
| import org.junit.Assert; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.TemporaryFolder; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| /** |
| * Tests for the {@link SafetyNetCloseableRegistry}. |
| */ |
| public class SafetyNetCloseableRegistryTest |
| extends AbstractCloseableRegistryTest<WrappingProxyCloseable<? extends Closeable>, |
| SafetyNetCloseableRegistry.PhantomDelegatingCloseableRef> { |
| |
| @Rule |
| public final TemporaryFolder tmpFolder = new TemporaryFolder(); |
| |
| @Override |
| protected WrappingProxyCloseable<? extends Closeable> createCloseable() { |
| return new WrappingProxyCloseable<Closeable>() { |
| |
| @Override |
| public void close() throws IOException {} |
| |
| @Override |
| public Closeable getWrappedDelegate() { |
| return this; |
| } |
| }; |
| } |
| |
| @Override |
| protected AbstractCloseableRegistry< |
| WrappingProxyCloseable<? extends Closeable>, |
| SafetyNetCloseableRegistry.PhantomDelegatingCloseableRef> createRegistry() { |
| |
| return new SafetyNetCloseableRegistry(); |
| } |
| |
| @Override |
| protected AbstractCloseableRegistryTest.ProducerThread< |
| WrappingProxyCloseable<? extends Closeable>, |
| SafetyNetCloseableRegistry.PhantomDelegatingCloseableRef> createProducerThread( |
| AbstractCloseableRegistry< |
| WrappingProxyCloseable<? extends Closeable>, |
| SafetyNetCloseableRegistry.PhantomDelegatingCloseableRef> registry, |
| AtomicInteger unclosedCounter, |
| int maxStreams) { |
| |
| return new AbstractCloseableRegistryTest.ProducerThread |
| <WrappingProxyCloseable<? extends Closeable>, |
| SafetyNetCloseableRegistry.PhantomDelegatingCloseableRef>(registry, unclosedCounter, maxStreams) { |
| |
| int count = 0; |
| |
| @Override |
| protected void createAndRegisterStream() throws IOException { |
| String debug = Thread.currentThread().getName() + " " + count; |
| TestStream testStream = new TestStream(refCount); |
| |
| // this method automatically registers the stream with the given registry. |
| @SuppressWarnings("unused") |
| ClosingFSDataInputStream pis = ClosingFSDataInputStream.wrapSafe( |
| testStream, (SafetyNetCloseableRegistry) registry, |
| debug); //reference dies here |
| ++count; |
| } |
| }; |
| } |
| |
| @After |
| public void tearDown() { |
| Assert.assertFalse(SafetyNetCloseableRegistry.isReaperThreadRunning()); |
| } |
| |
| @Test |
| public void testCorrectScopesForSafetyNet() throws Exception { |
| CheckedThread t1 = new CheckedThread() { |
| |
| @Override |
| public void go() throws Exception { |
| try { |
| FileSystem fs1 = FileSystem.getLocalFileSystem(); |
| // ensure no safety net in place |
| Assert.assertFalse(fs1 instanceof SafetyNetWrapperFileSystem); |
| FileSystemSafetyNet.initializeSafetyNetForThread(); |
| fs1 = FileSystem.getLocalFileSystem(); |
| // ensure safety net is in place now |
| Assert.assertTrue(fs1 instanceof SafetyNetWrapperFileSystem); |
| |
| Path tmp = new Path(tmpFolder.newFolder().toURI().toString(), "test_file"); |
| |
| try (FSDataOutputStream stream = fs1.create(tmp, FileSystem.WriteMode.NO_OVERWRITE)) { |
| CheckedThread t2 = new CheckedThread() { |
| @Override |
| public void go() { |
| FileSystem fs2 = FileSystem.getLocalFileSystem(); |
| // ensure the safety net does not leak here |
| Assert.assertFalse(fs2 instanceof SafetyNetWrapperFileSystem); |
| FileSystemSafetyNet.initializeSafetyNetForThread(); |
| fs2 = FileSystem.getLocalFileSystem(); |
| // ensure we can bring another safety net in place |
| Assert.assertTrue(fs2 instanceof SafetyNetWrapperFileSystem); |
| FileSystemSafetyNet.closeSafetyNetAndGuardedResourcesForThread(); |
| fs2 = FileSystem.getLocalFileSystem(); |
| // and that we can remove it again |
| Assert.assertFalse(fs2 instanceof SafetyNetWrapperFileSystem); |
| } |
| }; |
| |
| t2.start(); |
| t2.sync(); |
| |
| //ensure stream is still open and was never closed by any interferences |
| stream.write(42); |
| FileSystemSafetyNet.closeSafetyNetAndGuardedResourcesForThread(); |
| |
| // ensure leaking stream was closed |
| try { |
| stream.write(43); |
| Assert.fail(); |
| } catch (IOException ignore) { |
| |
| } |
| fs1 = FileSystem.getLocalFileSystem(); |
| // ensure safety net was removed |
| Assert.assertFalse(fs1 instanceof SafetyNetWrapperFileSystem); |
| } finally { |
| fs1.delete(tmp, false); |
| } |
| } catch (Exception e) { |
| Assert.fail(ExceptionUtils.stringifyException(e)); |
| } |
| } |
| }; |
| |
| t1.start(); |
| t1.sync(); |
| } |
| |
| @Test |
| public void testSafetyNetClose() throws Exception { |
| setup(20); |
| startThreads(); |
| |
| joinThreads(); |
| |
| for (int i = 0; i < 5 && unclosedCounter.get() > 0; ++i) { |
| System.gc(); |
| Thread.sleep(50); |
| } |
| |
| Assert.assertEquals(0, unclosedCounter.get()); |
| closeableRegistry.close(); |
| } |
| |
| @Test |
| public void testReaperThreadSpawnAndStop() throws Exception { |
| Assert.assertFalse(SafetyNetCloseableRegistry.isReaperThreadRunning()); |
| |
| try (SafetyNetCloseableRegistry ignored = new SafetyNetCloseableRegistry()) { |
| Assert.assertTrue(SafetyNetCloseableRegistry.isReaperThreadRunning()); |
| |
| try (SafetyNetCloseableRegistry ignored2 = new SafetyNetCloseableRegistry()) { |
| Assert.assertTrue(SafetyNetCloseableRegistry.isReaperThreadRunning()); |
| } |
| Assert.assertTrue(SafetyNetCloseableRegistry.isReaperThreadRunning()); |
| } |
| Assert.assertFalse(SafetyNetCloseableRegistry.isReaperThreadRunning()); |
| } |
| } |