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HADOOP-17862. ABFS: Fix unchecked cast compiler warning for AbfsListStatusRemoteIterator (#3331) 

closes #3331 

Contributed by Sumangala Patki
This commit is contained in:
sumangala-patki 2021-11-05 18:20:37 +05:30 committed by GitHub
parent 6f7b965808
commit 19644c0cdc
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3 changed files with 151 additions and 131 deletions
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57
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsListResult.java Normal file
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@ -0,0 +1,57 @@
/**
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.hadoop.fs.azurebfs.services;
import java.io.IOException;
import java.util.Collections;
import java.util.Iterator;
import org.apache.hadoop.fs.FileStatus;
/**
* Class to store listStatus results for AbfsListStatusRemoteIterator. The
* results can either be of type Iterator or an exception thrown during the
* operation
*/
public class AbfsListResult {
private IOException listException = null;
private Iterator<FileStatus> fileStatusIterator
= Collections.emptyIterator();
AbfsListResult(IOException ex) {
this.listException = ex;
}
AbfsListResult(Iterator<FileStatus> fileStatusIterator) {
this.fileStatusIterator = fileStatusIterator;
}
IOException getListingException() {
return listException;
}
Iterator<FileStatus> getFileStatusIterator() {
return fileStatusIterator;
}
boolean isFailedListing() {
return (listException != null);
}
}

37
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsListStatusRemoteIterator.java
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@ -27,7 +27,6 @@
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
import javax.activation.UnsupportedDataTypeException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@ -48,7 +47,7 @@ public class AbfsListStatusRemoteIterator
private final FileStatus fileStatus;
private final ListingSupport listingSupport;
private final ArrayBlockingQueue<Object> iteratorsQueue;
private final ArrayBlockingQueue<AbfsListResult> listResultQueue;
private final TracingContext tracingContext;
private volatile boolean isAsyncInProgress = false;
@ -61,7 +60,7 @@ public AbfsListStatusRemoteIterator(final FileStatus fileStatus,
this.fileStatus = fileStatus;
this.listingSupport = listingSupport;
this.tracingContext = tracingContext;
iteratorsQueue = new ArrayBlockingQueue<>(MAX_QUEUE_SIZE);
listResultQueue = new ArrayBlockingQueue<>(MAX_QUEUE_SIZE);
currIterator = Collections.emptyIterator();
fetchBatchesAsync();
}
@ -86,19 +85,17 @@ public FileStatus next() throws IOException {
private Iterator<FileStatus> getNextIterator() throws IOException {
fetchBatchesAsync();
try {
Object obj = null;
while (obj == null
&& (!isIterationComplete || !iteratorsQueue.isEmpty())) {
obj = iteratorsQueue.poll(POLL_WAIT_TIME_IN_MS, TimeUnit.MILLISECONDS);
AbfsListResult listResult = null;
while (listResult == null
&& (!isIterationComplete || !listResultQueue.isEmpty())) {
listResult = listResultQueue.poll(POLL_WAIT_TIME_IN_MS, TimeUnit.MILLISECONDS);
}
if (obj == null) {
if (listResult == null) {
return Collections.emptyIterator();
} else if (obj instanceof Iterator) {
return (Iterator<FileStatus>) obj;
} else if (obj instanceof IOException) {
throw (IOException) obj;
} else if (listResult.isFailedListing()) {
throw listResult.getListingException();
} else {
throw new UnsupportedDataTypeException();
return listResult.getFileStatusIterator();
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
@ -122,13 +119,13 @@ private void fetchBatchesAsync() {
private void asyncOp() {
try {
while (!isIterationComplete && iteratorsQueue.size() <= MAX_QUEUE_SIZE) {
while (!isIterationComplete && listResultQueue.size() <= MAX_QUEUE_SIZE) {
addNextBatchIteratorToQueue();
}
} catch (IOException ioe) {
LOG.error("Fetching filestatuses failed", ioe);
try {
iteratorsQueue.put(ioe);
listResultQueue.put(new AbfsListResult(ioe));
} catch (InterruptedException interruptedException) {
Thread.currentThread().interrupt();
LOG.error("Thread got interrupted: {}", interruptedException);
@ -143,19 +140,17 @@ private void asyncOp() {
}
}
private void addNextBatchIteratorToQueue()
private synchronized void addNextBatchIteratorToQueue()
throws IOException, InterruptedException {
List<FileStatus> fileStatuses = new ArrayList<>();
continuation = listingSupport
.listStatus(fileStatus.getPath(), null, fileStatuses, FETCH_ALL_FALSE,
continuation, tracingContext);
if (!fileStatuses.isEmpty()) {
iteratorsQueue.put(fileStatuses.iterator());
listResultQueue.put(new AbfsListResult(fileStatuses.iterator()));
}
synchronized (this) {
if (continuation == null || continuation.isEmpty()) {
isIterationComplete = true;
}
if (continuation == null || continuation.isEmpty()) {
isIterationComplete = true;
}
}

188
hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/ITestAbfsListStatusRemoteIterator.java
View File

@ -21,17 +21,20 @@
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import org.assertj.core.api.Assertions;
import org.junit.Assert;
import org.junit.Test;
import org.mockito.Mockito;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.Path;
@ -39,6 +42,7 @@
import org.apache.hadoop.fs.azurebfs.services.AbfsListStatusRemoteIterator;
import org.apache.hadoop.fs.azurebfs.services.ListingSupport;
import org.apache.hadoop.fs.azurebfs.utils.TracingContext;
import org.apache.hadoop.test.LambdaTestUtils;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyBoolean;
@ -52,6 +56,8 @@
public class ITestAbfsListStatusRemoteIterator extends AbstractAbfsIntegrationTest {
private static final int TEST_FILES_NUMBER = 1000;
private static final Logger LOG = LoggerFactory.getLogger(
ITestAbfsListStatusRemoteIterator.class);
public ITestAbfsListStatusRemoteIterator() throws Exception {
}
@ -60,8 +66,7 @@ public ITestAbfsListStatusRemoteIterator() throws Exception {
public void testAbfsIteratorWithHasNext() throws Exception {
Path testDir = createTestDirectory();
setPageSize(10);
final List<String> fileNames = createFilesUnderDirectory(TEST_FILES_NUMBER,
testDir, "testListPath");
final List<String> fileNames = createFilesUnderDirectory(testDir);
ListingSupport listngSupport = Mockito.spy(getFileSystem().getAbfsStore());
RemoteIterator<FileStatus> fsItr = new AbfsListStatusRemoteIterator(
@ -74,20 +79,12 @@ public void testAbfsIteratorWithHasNext() throws Exception {
int itrCount = 0;
while (fsItr.hasNext()) {
FileStatus fileStatus = fsItr.next();
String pathStr = fileStatus.getPath().toString();
fileNames.remove(pathStr);
verifyIteratorResultContent(fileStatus, fileNames);
itrCount++;
}
Assertions.assertThat(itrCount)
.describedAs("Number of iterations should be equal to the files "
+ "created")
.isEqualTo(TEST_FILES_NUMBER);
Assertions.assertThat(fileNames.size())
.describedAs("After removing every iterm found from the iterator, "
+ "there should be no more elements in the fileNames")
.isEqualTo(0);
int minNumberOfInvokations = TEST_FILES_NUMBER / 10;
verify(listngSupport, Mockito.atLeast(minNumberOfInvokations))
verifyIteratorResultCount(itrCount, fileNames);
int minNumberOfInvocations = TEST_FILES_NUMBER / 10;
verify(listngSupport, Mockito.atLeast(minNumberOfInvocations))
.listStatus(any(Path.class), nullable(String.class),
anyList(), anyBoolean(),
nullable(String.class),
@ -98,8 +95,7 @@ public void testAbfsIteratorWithHasNext() throws Exception {
public void testAbfsIteratorWithoutHasNext() throws Exception {
Path testDir = createTestDirectory();
setPageSize(10);
final List<String> fileNames = createFilesUnderDirectory(TEST_FILES_NUMBER,
testDir, "testListPath");
final List<String> fileNames = createFilesUnderDirectory(testDir);
ListingSupport listngSupport = Mockito.spy(getFileSystem().getAbfsStore());
RemoteIterator<FileStatus> fsItr = new AbfsListStatusRemoteIterator(
@ -112,25 +108,13 @@ public void testAbfsIteratorWithoutHasNext() throws Exception {
int itrCount = 0;
for (int i = 0; i < TEST_FILES_NUMBER; i++) {
FileStatus fileStatus = fsItr.next();
String pathStr = fileStatus.getPath().toString();
fileNames.remove(pathStr);
verifyIteratorResultContent(fileStatus, fileNames);
itrCount++;
}
Assertions.assertThatThrownBy(() -> fsItr.next())
.describedAs(
"next() should throw NoSuchElementException since next has been "
+ "called " + TEST_FILES_NUMBER + " times")
.isInstanceOf(NoSuchElementException.class);
Assertions.assertThat(itrCount)
.describedAs("Number of iterations should be equal to the files "
+ "created")
.isEqualTo(TEST_FILES_NUMBER);
Assertions.assertThat(fileNames.size())
.describedAs("After removing every iterm found from the iterator, "
+ "there should be no more elements in the fileNames")
.isEqualTo(0);
int minNumberOfInvokations = TEST_FILES_NUMBER / 10;
verify(listngSupport, Mockito.atLeast(minNumberOfInvokations))
LambdaTestUtils.intercept(NoSuchElementException.class, fsItr::next);
verifyIteratorResultCount(itrCount, fileNames);
int minNumberOfInvocations = TEST_FILES_NUMBER / 10;
verify(listngSupport, Mockito.atLeast(minNumberOfInvocations))
.listStatus(any(Path.class), nullable(String.class),
anyList(), anyBoolean(),
nullable(String.class),
@ -141,9 +125,8 @@ public void testAbfsIteratorWithoutHasNext() throws Exception {
public void testWithAbfsIteratorDisabled() throws Exception {
Path testDir = createTestDirectory();
setPageSize(10);
setEnableAbfsIterator(false);
final List<String> fileNames = createFilesUnderDirectory(TEST_FILES_NUMBER,
testDir, "testListPath");
disableAbfsIterator();
final List<String> fileNames = createFilesUnderDirectory(testDir);
RemoteIterator<FileStatus> fsItr =
getFileSystem().listStatusIterator(testDir);
@ -154,73 +137,46 @@ public void testWithAbfsIteratorDisabled() throws Exception {
int itrCount = 0;
while (fsItr.hasNext()) {
FileStatus fileStatus = fsItr.next();
String pathStr = fileStatus.getPath().toString();
fileNames.remove(pathStr);
verifyIteratorResultContent(fileStatus, fileNames);
itrCount++;
}
Assertions.assertThat(itrCount)
.describedAs("Number of iterations should be equal to the files "
+ "created")
.isEqualTo(TEST_FILES_NUMBER);
Assertions.assertThat(fileNames.size())
.describedAs("After removing every iterm found from the iterator, "
+ "there should be no more elements in the fileNames")
.isEqualTo(0);
verifyIteratorResultCount(itrCount, fileNames);
}
@Test
public void testWithAbfsIteratorDisabledWithoutHasNext() throws Exception {
Path testDir = createTestDirectory();
setPageSize(10);
setEnableAbfsIterator(false);
final List<String> fileNames = createFilesUnderDirectory(TEST_FILES_NUMBER,
testDir, "testListPath");
disableAbfsIterator();
final List<String> fileNames = createFilesUnderDirectory(testDir);
RemoteIterator<FileStatus> fsItr =
getFileSystem().listStatusIterator(testDir);
Assertions.assertThat(fsItr)
.describedAs("RemoteIterator should not be instance of "
+ "AbfsListStatusRemoteIterator when it is disabled")
RemoteIterator<FileStatus> fsItr = getFileSystem().listStatusIterator(
testDir);
Assertions.assertThat(fsItr).describedAs(
"RemoteIterator should not be instance of "
+ "AbfsListStatusRemoteIterator when it is disabled")
.isNotInstanceOf(AbfsListStatusRemoteIterator.class);
int itrCount = 0;
for (int i = 0; i < TEST_FILES_NUMBER; i++) {
int itrCount;
for (itrCount = 0; itrCount < TEST_FILES_NUMBER; itrCount++) {
FileStatus fileStatus = fsItr.next();
String pathStr = fileStatus.getPath().toString();
fileNames.remove(pathStr);
itrCount++;
verifyIteratorResultContent(fileStatus, fileNames);
}
Assertions.assertThatThrownBy(() -> fsItr.next())
.describedAs(
"next() should throw NoSuchElementException since next has been "
+ "called " + TEST_FILES_NUMBER + " times")
.isInstanceOf(NoSuchElementException.class);
Assertions.assertThat(itrCount)
.describedAs("Number of iterations should be equal to the files "
+ "created")
.isEqualTo(TEST_FILES_NUMBER);
Assertions.assertThat(fileNames.size())
.describedAs("After removing every iterm found from the iterator, "
+ "there should be no more elements in the fileNames")
.isEqualTo(0);
LambdaTestUtils.intercept(NoSuchElementException.class, fsItr::next);
verifyIteratorResultCount(itrCount, fileNames);
}
@Test
public void testNextWhenNoMoreElementsPresent() throws Exception {
Path testDir = createTestDirectory();
setPageSize(10);
RemoteIterator fsItr =
RemoteIterator<FileStatus> fsItr =
new AbfsListStatusRemoteIterator(getFileSystem().getFileStatus(testDir),
getFileSystem().getAbfsStore(),
getTestTracingContext(getFileSystem(), true));
fsItr = Mockito.spy(fsItr);
Mockito.doReturn(false).when(fsItr).hasNext();
RemoteIterator<FileStatus> finalFsItr = fsItr;
Assertions.assertThatThrownBy(() -> finalFsItr.next())
.describedAs(
"next() should throw NoSuchElementException if hasNext() return "
+ "false")
.isInstanceOf(NoSuchElementException.class);
LambdaTestUtils.intercept(NoSuchElementException.class, fsItr::next);
}
@Test
@ -257,38 +213,47 @@ public void testIOException() throws Exception {
String exceptionMessage = "test exception";
ListingSupport lsSupport =getMockListingSupport(exceptionMessage);
RemoteIterator fsItr =
RemoteIterator<FileStatus> fsItr =
new AbfsListStatusRemoteIterator(getFileSystem().getFileStatus(testDir),
lsSupport, getTestTracingContext(getFileSystem(), true));
Assertions.assertThatThrownBy(() -> fsItr.next())
.describedAs(
"When ioException is not null and queue is empty exception should be "
+ "thrown")
.isInstanceOf(IOException.class)
.hasMessage(exceptionMessage);
LambdaTestUtils.intercept(IOException.class, fsItr::next);
}
@Test
public void testNonExistingPath() throws Throwable {
public void testNonExistingPath() throws Exception {
Path nonExistingDir = new Path("nonExistingPath");
Assertions.assertThatThrownBy(
() -> getFileSystem().listStatusIterator(nonExistingDir)).describedAs(
"test the listStatusIterator call on a path which is not "
+ "present should result in FileNotFoundException")
.isInstanceOf(FileNotFoundException.class);
LambdaTestUtils.intercept(FileNotFoundException.class,
() -> getFileSystem().listStatusIterator(nonExistingDir));
}
private void verifyIteratorResultContent(FileStatus fileStatus,
List<String> fileNames) {
String pathStr = fileStatus.getPath().toString();
Assert.assertTrue(
String.format("Could not remove path %s from filenames %s", pathStr,
fileNames), fileNames.remove(pathStr));
}
private void verifyIteratorResultCount(int itrCount, List<String> fileNames) {
Assertions.assertThat(itrCount).describedAs(
"Number of iterations should be equal to the files created")
.isEqualTo(TEST_FILES_NUMBER);
Assertions.assertThat(fileNames)
.describedAs("After removing every item found from the iterator, "
+ "there should be no more elements in the fileNames")
.hasSize(0);
}
private ListingSupport getMockListingSupport(String exceptionMessage) {
return new ListingSupport() {
@Override
public FileStatus[] listStatus(Path path, TracingContext tracingContext) throws IOException {
public FileStatus[] listStatus(Path path, TracingContext tracingContext) {
return null;
}
@Override
public FileStatus[] listStatus(Path path, String startFrom, TracingContext tracingContext)
throws IOException {
public FileStatus[] listStatus(Path path, String startFrom, TracingContext tracingContext) {
return null;
}
@ -303,15 +268,14 @@ public String listStatus(Path path, String startFrom,
}
private Path createTestDirectory() throws IOException {
String testDirectoryName = "testDirectory" + System.currentTimeMillis();
Path testDirectory = path(testDirectoryName);
Path testDirectory = path("testDirectory");
getFileSystem().mkdirs(testDirectory);
return testDirectory;
}
private void setEnableAbfsIterator(boolean shouldEnable) throws IOException {
private void disableAbfsIterator() throws IOException {
AzureBlobFileSystemStore abfsStore = getAbfsStore(getFileSystem());
abfsStore.getAbfsConfiguration().setEnableAbfsListIterator(shouldEnable);
abfsStore.getAbfsConfiguration().setEnableAbfsListIterator(false);
}
private void setPageSize(int pageSize) throws IOException {
@ -319,21 +283,21 @@ private void setPageSize(int pageSize) throws IOException {
abfsStore.getAbfsConfiguration().setListMaxResults(pageSize);
}
private List<String> createFilesUnderDirectory(int numFiles, Path rootPath,
String filenamePrefix)
private List<String> createFilesUnderDirectory(Path rootPath)
throws ExecutionException, InterruptedException, IOException {
final List<Future<Void>> tasks = new ArrayList<>();
final List<String> fileNames = new ArrayList<>();
final List<String> fileNames = Collections.synchronizedList(new ArrayList<>());
ExecutorService es = Executors.newFixedThreadPool(10);
try {
for (int i = 0; i < numFiles; i++) {
final Path filePath = new Path(rootPath, filenamePrefix + i);
Callable<Void> callable = () -> {
getFileSystem().create(filePath);
fileNames.add(makeQualified(filePath).toString());
for (int i = 0; i < ITestAbfsListStatusRemoteIterator.TEST_FILES_NUMBER; i++) {
Path filePath = makeQualified(new Path(rootPath, "testListPath" + i));
tasks.add(es.submit(() -> {
touch(filePath);
synchronized (fileNames) {
Assert.assertTrue(fileNames.add(filePath.toString()));
}
return null;
};
tasks.add(es.submit(callable));
}));
}
for (Future<Void> task : tasks) {
task.get();
@ -341,6 +305,10 @@ private List<String> createFilesUnderDirectory(int numFiles, Path rootPath,
} finally {
es.shutdownNow();
}
LOG.debug(fileNames.toString());
Assertions.assertThat(fileNames)
.describedAs("File creation incorrect or fileNames not added to list")
.hasSize(ITestAbfsListStatusRemoteIterator.TEST_FILES_NUMBER);
return fileNames;
}