steveloughran commented on code in PR #6409:
URL: https://github.com/apache/hadoop/pull/6409#discussion_r1552243088


##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AbfsConfiguration.java:
##########
@@ -1240,8 +1244,8 @@ public boolean getRenameResilience() {
     return renameResilience;
   }
 
-  void setRenameResilience(boolean actualResilience) {

Review Comment:
   any reason to cut this? I presume it means no tests are using it...



##########
hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/services/ITestAbfsPaginatedDelete.java:
##########
@@ -0,0 +1,333 @@
+/**
+ * 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.hadoop.fs.azurebfs.services;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.UUID;
+
+import org.assertj.core.api.Assertions;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.azurebfs.AbstractAbfsIntegrationTest;
+import org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem;
+import org.apache.hadoop.fs.azurebfs.constants.AbfsHttpConstants;
+import 
org.apache.hadoop.fs.azurebfs.contracts.exceptions.AbfsRestOperationException;
+import org.apache.hadoop.fs.azurebfs.oauth2.ClientCredsTokenProvider;
+import org.apache.hadoop.fs.azurebfs.utils.AclTestHelpers;
+import org.apache.hadoop.fs.azurebfs.utils.TracingContext;
+import org.apache.hadoop.fs.permission.AclEntry;
+import org.apache.hadoop.fs.permission.AclEntryScope;
+import org.apache.hadoop.fs.permission.AclEntryType;
+import org.apache.hadoop.fs.permission.FsAction;
+import org.apache.hadoop.util.Lists;
+
+import static java.net.HttpURLConnection.HTTP_BAD_REQUEST;
+import static java.net.HttpURLConnection.HTTP_NOT_FOUND;
+import static 
org.apache.hadoop.fs.azurebfs.constants.ConfigurationKeys.AZURE_CREATE_REMOTE_FILESYSTEM_DURING_INITIALIZATION;
+import static 
org.apache.hadoop.fs.azurebfs.constants.ConfigurationKeys.FS_AZURE_ACCOUNT_AUTH_TYPE_PROPERTY_NAME;
+import static 
org.apache.hadoop.fs.azurebfs.constants.ConfigurationKeys.FS_AZURE_ACCOUNT_OAUTH_CLIENT_ENDPOINT;
+import static 
org.apache.hadoop.fs.azurebfs.constants.ConfigurationKeys.FS_AZURE_ACCOUNT_TOKEN_PROVIDER_TYPE_PROPERTY_NAME;
+import static 
org.apache.hadoop.fs.azurebfs.constants.FileSystemUriSchemes.ABFS_SECURE_SCHEME;
+import static 
org.apache.hadoop.fs.azurebfs.constants.HttpHeaderConfigurations.X_MS_VERSION;
+import static 
org.apache.hadoop.fs.azurebfs.constants.HttpQueryParams.QUERY_PARAM_PAGINATED;
+import static 
org.apache.hadoop.fs.azurebfs.constants.TestConfigurationKeys.FS_AZURE_BLOB_FS_CHECKACCESS_TEST_CLIENT_ID;
+import static 
org.apache.hadoop.fs.azurebfs.constants.TestConfigurationKeys.FS_AZURE_BLOB_FS_CHECKACCESS_TEST_CLIENT_SECRET;
+import static 
org.apache.hadoop.fs.azurebfs.constants.TestConfigurationKeys.FS_AZURE_BLOB_FS_CHECKACCESS_TEST_USER_GUID;
+import static 
org.apache.hadoop.fs.azurebfs.constants.TestConfigurationKeys.FS_AZURE_BLOB_FS_CLIENT_ID;
+import static 
org.apache.hadoop.fs.azurebfs.constants.TestConfigurationKeys.FS_AZURE_BLOB_FS_CLIENT_SECRET;
+import static 
org.apache.hadoop.fs.azurebfs.constants.TestConfigurationKeys.FS_AZURE_TEST_NAMESPACE_ENABLED_ACCOUNT;
+import static 
org.apache.hadoop.fs.azurebfs.services.AbfsClientUtils.getHeaderValue;
+import static org.apache.hadoop.test.LambdaTestUtils.intercept;
+
+/**
+ * Tests to verify server side pagination feature is supported from driver.
+ */
+public class ITestAbfsPaginatedDelete extends AbstractAbfsIntegrationTest {
+
+  /**
+   * File system using super-user OAuth, used to create the directory.
+   */
+  private AzureBlobFileSystem superUserFs;
+
+  /**
+   * File system using NoRBAC user OAuth, used to delete the directory.
+   * This user will have default ACL permissions set on  root path including 
delete.
+   * Since this is not a super-user, azure servers will trigger recursive ACL
+   * checks on root path when delete is called using this user OAuth token.
+   */
+  private AzureBlobFileSystem testUserFs;
+
+  /**
+   * Service supports Pagination only for HNS Accounts.
+   */
+  private boolean isHnsEnabled;
+
+  public ITestAbfsPaginatedDelete() throws Exception {
+  }
+
+  /**
+   * Create file system instances for both super-user and test user.
+   * @throws Exception
+   */
+  @Override
+  public void setup() throws Exception {
+    super.setup();
+    this.superUserFs = getFileSystem();
+
+    assumeValidTestConfigPresent(this.getRawConfiguration(),
+        FS_AZURE_TEST_NAMESPACE_ENABLED_ACCOUNT);
+    isHnsEnabled = this.getConfiguration().getBoolean(
+        FS_AZURE_TEST_NAMESPACE_ENABLED_ACCOUNT, false);
+
+    assumeTestUserCredentialsConfigured();
+    this.testUserFs = isHnsEnabled ? createTestUserFs() : null;
+  }
+
+  private AzureBlobFileSystem createTestUserFs() throws IOException {
+    // Test User Credentials.
+    String firstTestUserGuid = getConfiguration().get(
+        FS_AZURE_BLOB_FS_CHECKACCESS_TEST_USER_GUID);
+    String clientId = getConfiguration().getString(
+        FS_AZURE_BLOB_FS_CHECKACCESS_TEST_CLIENT_ID, "");
+    String clientSecret = getConfiguration().getString(
+        FS_AZURE_BLOB_FS_CHECKACCESS_TEST_CLIENT_SECRET, "");
+
+    Configuration testUserConf = new Configuration(getRawConfiguration());
+    setTestUserConf(testUserConf, FS_AZURE_ACCOUNT_AUTH_TYPE_PROPERTY_NAME, 
AuthType.OAuth.name());
+    setTestUserConf(testUserConf, FS_AZURE_BLOB_FS_CLIENT_ID, clientId);
+    setTestUserConf(testUserConf, FS_AZURE_BLOB_FS_CLIENT_SECRET, 
clientSecret);
+    setTestUserConf(testUserConf, 
FS_AZURE_ACCOUNT_TOKEN_PROVIDER_TYPE_PROPERTY_NAME,
+        ClientCredsTokenProvider.class.getName());
+
+    
testUserConf.setBoolean(AZURE_CREATE_REMOTE_FILESYSTEM_DURING_INITIALIZATION, 
false);
+    testUserConf.setBoolean(String.format("fs.%s.impl.disable.cache", 
ABFS_SECURE_SCHEME), true);
+
+    setDefaultAclOnRoot(firstTestUserGuid);
+    return (AzureBlobFileSystem) FileSystem.newInstance(testUserConf);
+  }
+
+  private void setTestUserConf(Configuration conf, String key, String value) {
+    conf.set(key, value);
+    conf.set(key + "." + getAccountName(), value);
+  }
+
+  /**
+   * Test to check that recursive deletePath works with paginated enabled and
+   * disabled for both empty and non-empty directory.
+   * When enabled appropriate xMsVersion should be used.
+   * @throws Exception
+   */
+  @Test
+  public void testRecursiveDeleteWithPagination() throws Exception {
+    testRecursiveDeleteWithPaginationInternal(false, true,
+        AbfsHttpConstants.ApiVersion.DEC_12_2019);
+    testRecursiveDeleteWithPaginationInternal(false, true,
+        AbfsHttpConstants.ApiVersion.AUG_03_2023);
+    testRecursiveDeleteWithPaginationInternal(false, false,
+        AbfsHttpConstants.ApiVersion.DEC_12_2019);
+    testRecursiveDeleteWithPaginationInternal(false, false,
+        AbfsHttpConstants.ApiVersion.AUG_03_2023);
+    testRecursiveDeleteWithPaginationInternal(true, true,
+        AbfsHttpConstants.ApiVersion.DEC_12_2019);
+    testRecursiveDeleteWithPaginationInternal(true, false,
+        AbfsHttpConstants.ApiVersion.AUG_03_2023);
+  }
+
+  /**
+   * Test to check that non-recursive delete works with both paginated enabled
+   * and disabled only for empty directories.
+   * Pagination should not be set when recursive is false.
+   * @throws Exception
+   */
+  @Test
+  public void testNonRecursiveDeleteWithPagination() throws Exception {
+    testNonRecursiveDeleteWithPaginationInternal(true);
+    testNonRecursiveDeleteWithPaginationInternal(false);
+  }
+
+  /**
+   * Test to check that with pagination enabled, invalid CT will fail
+   * @throws Exception
+   */
+  @Test
+  public void testRecursiveDeleteWithInvalidCT() throws Exception {
+    testRecursiveDeleteWithInvalidCTInternal(true);
+    testRecursiveDeleteWithInvalidCTInternal(false);
+  }
+
+  private void testRecursiveDeleteWithPaginationInternal(boolean isEmptyDir,
+      boolean isPaginatedDeleteEnabled, AbfsHttpConstants.ApiVersion 
xMsVersion)
+      throws Exception {
+    final AzureBlobFileSystem fs = getUserFileSystem();
+    TracingContext testTC = getTestTracingContext(fs, true);
+
+    Path testPath;
+    if (isEmptyDir) {
+      testPath = new Path("/emptyPath" + StringUtils.right(
+          UUID.randomUUID().toString(), 10));
+      superUserFs.mkdirs(testPath);
+    } else {
+      testPath = createSmallDir();
+    }
+
+    // Set the paginated enabled value and xMsVersion at spiedClient level.
+    AbfsClient spiedClient = Mockito.spy(fs.getAbfsStore().getClient());
+    ITestAbfsClient.setAbfsClientField(spiedClient, "xMsVersion", xMsVersion);
+    
Mockito.doReturn(isPaginatedDeleteEnabled).when(spiedClient).getIsPaginatedDeleteEnabled();
+
+    AbfsRestOperation op = spiedClient.deletePath(
+        testPath.toString(), true, null, testTC, isHnsEnabled);
+
+    // Getting the xMsVersion that was used to make the request
+    String xMsVersionUsed = getHeaderValue(op.getRequestHeaders(), 
X_MS_VERSION);
+    String urlUsed = op.getUrl().toString();
+
+    // Assert that appropriate xMsVersion and query param was used to make 
request
+    if (isPaginatedDeleteEnabled && isHnsEnabled) {
+      Assertions.assertThat(urlUsed)
+          .describedAs("Url must have paginated = true as query param")
+          .contains(QUERY_PARAM_PAGINATED);
+      if (xMsVersion.compareTo(AbfsHttpConstants.ApiVersion.AUG_03_2023) < 0) {

Review Comment:
   this is going to need revision in future. just be aware



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