HADOOP-11572. s3a delete() operation fails during a concurrent delete of child entries.
Contributed by Steve Loughran. (cherry picked from commit 2ac5aab8d725f761a9f9723471a4426f6b5d78c4)
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@ -49,6 +49,7 @@
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import com.amazonaws.services.s3.model.GetObjectMetadataRequest;
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import com.amazonaws.services.s3.model.InitiateMultipartUploadRequest;
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import com.amazonaws.services.s3.model.ListObjectsRequest;
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import com.amazonaws.services.s3.model.MultiObjectDeleteException;
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import com.amazonaws.services.s3.model.ObjectListing;
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import com.amazonaws.services.s3.model.ObjectMetadata;
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import com.amazonaws.services.s3.model.PartETag;
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@ -455,7 +456,8 @@ public void setInputPolicy(S3AInputPolicy inputPolicy) {
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* @param path input path, may be relative to the working dir
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* @return a key excluding the leading "/", or, if it is the root path, ""
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*/
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private String pathToKey(Path path) {
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@VisibleForTesting
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String pathToKey(Path path) {
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if (!path.isAbsolute()) {
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path = new Path(workingDir, path);
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}
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@ -1011,11 +1013,26 @@ private void blockRootDelete(String key) throws InvalidRequestException {
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* Increments the {@code OBJECT_DELETE_REQUESTS} and write
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* operation statistics.
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* @param deleteRequest keys to delete on the s3-backend
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* @throws MultiObjectDeleteException one or more of the keys could not
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* be deleted.
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* @throws AmazonClientException amazon-layer failure.
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*/
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private void deleteObjects(DeleteObjectsRequest deleteRequest) {
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private void deleteObjects(DeleteObjectsRequest deleteRequest)
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throws MultiObjectDeleteException, AmazonClientException {
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incrementWriteOperations();
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incrementStatistic(OBJECT_DELETE_REQUESTS, 1);
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s3.deleteObjects(deleteRequest);
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try {
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s3.deleteObjects(deleteRequest);
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} catch (MultiObjectDeleteException e) {
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// one or more of the operations failed.
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List<MultiObjectDeleteException.DeleteError> errors = e.getErrors();
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LOG.error("Partial failure of delete, {} errors", errors.size(), e);
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for (MultiObjectDeleteException.DeleteError error : errors) {
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LOG.error("{}: \"{}\" - {}",
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error.getKey(), error.getCode(), error.getMessage());
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}
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throw e;
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}
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}
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/**
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@ -1225,10 +1242,15 @@ public void incrementPutProgressStatistics(String key, long bytes) {
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* @param deleteFakeDir indicates whether this is for deleting fake dirs
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* @throws InvalidRequestException if the request was rejected due to
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* a mistaken attempt to delete the root directory.
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* @throws MultiObjectDeleteException one or more of the keys could not
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* be deleted in a multiple object delete operation.
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* @throws AmazonClientException amazon-layer failure.
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*/
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private void removeKeys(List<DeleteObjectsRequest.KeyVersion> keysToDelete,
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@VisibleForTesting
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void removeKeys(List<DeleteObjectsRequest.KeyVersion> keysToDelete,
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boolean clearKeys, boolean deleteFakeDir)
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throws AmazonClientException, InvalidRequestException {
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throws MultiObjectDeleteException, AmazonClientException,
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InvalidRequestException {
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if (keysToDelete.isEmpty()) {
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// exit fast if there are no keys to delete
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return;
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@ -1874,6 +1874,31 @@ Consult [Cleaning up After Incremental Upload Failures](#s3a_multipart_purge) fo
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details on how the multipart purge timeout can be set. If multipart uploads
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are failing with the message above, it may be a sign that this value is too low.
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### `MultiObjectDeleteException` during delete or rename of files
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```
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Exception in thread "main" com.amazonaws.services.s3.model.MultiObjectDeleteException:
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Status Code: 0, AWS Service: null, AWS Request ID: null, AWS Error Code: null,
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AWS Error Message: One or more objects could not be deleted, S3 Extended Request ID: null
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at com.amazonaws.services.s3.AmazonS3Client.deleteObjects(AmazonS3Client.java:1745)
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```
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This happens when trying to delete multiple objects, and one of the objects
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could not be deleted. It *should not occur* just because the object is missing.
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More specifically: at the time this document was written, we could not create
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such a failure.
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It will occur if the caller lacks the permission to delete any of the objects.
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Consult the log to see the specifics of which objects could not be deleted.
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Do you have permission to do so?
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If this operation is failing for reasons other than the caller lacking
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permissions:
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1. Try setting `fs.s3a.multiobjectdelete.enable` to `false`.
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1. Consult [HADOOP-11572](https://issues.apache.org/jira/browse/HADOOP-11572)
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for up to date advice.
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### When writing to S3A, HTTP Exceptions logged at info from `AmazonHttpClient`
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```
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@ -18,17 +18,24 @@
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package org.apache.hadoop.fs.s3a;
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import com.amazonaws.services.s3.model.DeleteObjectsRequest;
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import com.amazonaws.services.s3.model.MultiObjectDeleteException;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FSDataInputStream;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.InvalidRequestException;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.test.LambdaTestUtils;
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import org.junit.Assume;
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import org.junit.Test;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.EOFException;
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import java.io.FileNotFoundException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.Callable;
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import static org.apache.hadoop.fs.contract.ContractTestUtils.*;
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@ -41,6 +48,13 @@ public class ITestS3AFailureHandling extends AbstractS3ATestBase {
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private static final Logger LOG =
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LoggerFactory.getLogger(ITestS3AFailureHandling.class);
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@Override
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protected Configuration createConfiguration() {
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Configuration conf = super.createConfiguration();
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S3ATestUtils.disableFilesystemCaching(conf);
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conf.setBoolean(Constants.ENABLE_MULTI_DELETE, true);
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return conf;
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}
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@Test
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public void testReadFileChanged() throws Throwable {
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describe("overwrite a file with a shorter one during a read, seek");
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@ -127,4 +141,41 @@ private void assertIsEOF(String operation, int readResult) {
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assertEquals("Expected EOF from "+ operation
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+ "; got char " + (char) readResult, -1, readResult);
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}
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@Test
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public void testMultiObjectDeleteNoFile() throws Throwable {
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describe("Deleting a missing object");
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removeKeys(getFileSystem(), "ITestS3AFailureHandling/missingFile");
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}
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private void removeKeys(S3AFileSystem fileSystem, String... keys)
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throws InvalidRequestException {
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List<DeleteObjectsRequest.KeyVersion> request = new ArrayList<>(
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keys.length);
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for (String key : keys) {
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request.add(new DeleteObjectsRequest.KeyVersion(key));
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}
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fileSystem.removeKeys(request, false, false);
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}
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@Test
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public void testMultiObjectDeleteSomeFiles() throws Throwable {
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Path valid = path("ITestS3AFailureHandling/validFile");
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touch(getFileSystem(), valid);
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NanoTimer timer = new NanoTimer();
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removeKeys(getFileSystem(), getFileSystem().pathToKey(valid),
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"ITestS3AFailureHandling/missingFile");
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timer.end("removeKeys");
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}
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@Test(expected = MultiObjectDeleteException.class)
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public void testMultiObjectDeleteNoPermissions() throws Throwable {
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Configuration conf = getConfiguration();
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String csvFile = conf.getTrimmed(KEY_CSVTEST_FILE, DEFAULT_CSVTEST_FILE);
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Assume.assumeTrue("CSV test file is not the default",
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DEFAULT_CSVTEST_FILE.equals(csvFile));
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Path testFile = new Path(csvFile);
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S3AFileSystem fs = (S3AFileSystem)FileSystem.newInstance(testFile.toUri(), conf);
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removeKeys(fs, fs.pathToKey(testFile));
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}
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}
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