HBASE-28502 Cleanup old backup manifest logic (#5871)

In older versions of HBase's backup mechanism, a manifest
was written per table being backed up. This was since refactored
to one manifest per backup, but the manifest code was not updated.
A concrete issue with the old code was that the manifest
for full backups did not correctly list the tables included
in the backup.

Signed-off-by: Nick Dimiduk <ndimiduk@apache.org>
Reviewed-by: Ray Mattingly <rmdmattingly@gmail.com>

Author: DieterDP-ng

hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/HBackupFileSystem.java

@@ -18,11 +18,9 @@
 package org.apache.hadoop.hbase.backup;
 
 import java.io.IOException;
-import java.util.HashMap;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.backup.impl.BackupManifest;
 import org.apache.yetus.audience.InterfaceAudience;
@@ -44,8 +42,8 @@ private HBackupFileSystem() {
   }
 
   /**
-   * Given the backup root dir, backup id and the table name, return the backup image location,
-   * which is also where the backup manifest file is. return value look like:
+   * Given the backup root dir, backup id and the table name, return the backup image location.
+   * Return value look like:
    * "hdfs://backup.hbase.org:9000/user/biadmin/backup/backup_1396650096738/default/t1_dn/", where
    * "hdfs://backup.hbase.org:9000/user/biadmin/backup" is a backup root directory
    * @param backupRootDir backup root directory
@@ -79,11 +77,6 @@ public static Path getBackupTmpDirPathForBackupId(String backupRoot, String back
     return new Path(getBackupTmpDirPath(backupRoot), backupId);
   }
 
-  public static String getTableBackupDataDir(String backupRootDir, String backupId,
-    TableName tableName) {
-    return getTableBackupDir(backupRootDir, backupId, tableName) + Path.SEPARATOR + "data";
-  }
-
   public static Path getBackupPath(String backupRootDir, String backupId) {
     return new Path(backupRootDir + Path.SEPARATOR + backupId);
   }
@@ -102,24 +95,6 @@ public static Path getTableBackupPath(TableName tableName, Path backupRootPath,
     return new Path(getTableBackupDir(backupRootPath.toString(), backupId, tableName));
   }
 
-  /**
-   * Given the backup root dir and the backup id, return the log file location for an incremental
-   * backup.
-   * @param backupRootDir backup root directory
-   * @param backupId      backup id
-   * @return logBackupDir: ".../user/biadmin/backup/WALs/backup_1396650096738"
-   */
-  public static String getLogBackupDir(String backupRootDir, String backupId) {
-    return backupRootDir + Path.SEPARATOR + backupId + Path.SEPARATOR
-      + HConstants.HREGION_LOGDIR_NAME;
-  }
-
-  public static Path getLogBackupPath(String backupRootDir, String backupId) {
-    return new Path(getLogBackupDir(backupRootDir, backupId));
-  }
-
-  // TODO we do not keep WAL files anymore
-  // Move manifest file to other place
   private static Path getManifestPath(Configuration conf, Path backupRootPath, String backupId)
     throws IOException {
     FileSystem fs = backupRootPath.getFileSystem(conf);
@@ -140,19 +115,4 @@ public static BackupManifest getManifest(Configuration conf, Path backupRootPath
       new BackupManifest(conf, getManifestPath(conf, backupRootPath, backupId));
     return manifest;
   }
-
-  /**
-   * Check whether the backup image path and there is manifest file in the path.
-   * @param backupManifestMap If all the manifests are found, then they are put into this map
-   * @param tableArray        the tables involved
-   * @throws IOException exception
-   */
-  public static void checkImageManifestExist(HashMap<TableName, BackupManifest> backupManifestMap,
-    TableName[] tableArray, Configuration conf, Path backupRootPath, String backupId)
-    throws IOException {
-    for (TableName tableName : tableArray) {
-      BackupManifest manifest = getManifest(conf, backupRootPath, backupId);
-      backupManifestMap.put(tableName, manifest);
-    }
-  }
 }

hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupAdminImpl.java

@@ -19,6 +19,7 @@
 
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -498,16 +499,15 @@ private String[] toStringArray(TableName[] list) {
   @Override
   public void restore(RestoreRequest request) throws IOException {
     if (request.isCheck()) {
-      HashMap<TableName, BackupManifest> backupManifestMap = new HashMap<>();
       // check and load backup image manifest for the tables
       Path rootPath = new Path(request.getBackupRootDir());
       String backupId = request.getBackupId();
       TableName[] sTableArray = request.getFromTables();
-      HBackupFileSystem.checkImageManifestExist(backupManifestMap, sTableArray,
-        conn.getConfiguration(), rootPath, backupId);
+      BackupManifest manifest =
+        HBackupFileSystem.getManifest(conn.getConfiguration(), rootPath, backupId);
 
       // Check and validate the backup image and its dependencies
-      if (BackupUtils.validate(backupManifestMap, conn.getConfiguration())) {
+      if (BackupUtils.validate(Arrays.asList(sTableArray), manifest, conn.getConfiguration())) {
         LOG.info(CHECK_OK);
       } else {
         LOG.error(CHECK_FAILED);

hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupManifest.java

@@ -465,7 +465,7 @@ public List<TableName> getTableList() {
   }
 
   /**
-   * TODO: fix it. Persist the manifest file.
+   * Persist the manifest file.
    * @throws BackupException if an error occurred while storing the manifest file.
    */
   public void store(Configuration conf) throws BackupException {

hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/RestoreTablesClient.java

@@ -21,7 +21,6 @@
 
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
 import java.util.TreeSet;
 import org.apache.commons.lang3.StringUtils;
@@ -204,19 +203,17 @@ private List<Path> getFilesRecursively(String fileBackupDir)
 
   /**
    * Restore operation. Stage 2: resolved Backup Image dependency
-   * @param backupManifestMap : tableName, Manifest
-   * @param sTableArray       The array of tables to be restored
-   * @param tTableArray       The array of mapping tables to restore to
+   * @param sTableArray The array of tables to be restored
+   * @param tTableArray The array of mapping tables to restore to
    * @throws IOException exception
    */
-  private void restore(HashMap<TableName, BackupManifest> backupManifestMap,
-    TableName[] sTableArray, TableName[] tTableArray, boolean isOverwrite) throws IOException {
+  private void restore(BackupManifest manifest, TableName[] sTableArray, TableName[] tTableArray,
+    boolean isOverwrite) throws IOException {
     TreeSet<BackupImage> restoreImageSet = new TreeSet<>();
 
     for (int i = 0; i < sTableArray.length; i++) {
       TableName table = sTableArray[i];
 
-      BackupManifest manifest = backupManifestMap.get(table);
       // Get the image list of this backup for restore in time order from old
       // to new.
       List<BackupImage> list = new ArrayList<>();
@@ -256,12 +253,10 @@ public void execute() throws IOException {
     checkTargetTables(tTableArray, isOverwrite);
 
     // case RESTORE_IMAGES:
-    HashMap<TableName, BackupManifest> backupManifestMap = new HashMap<>();
     // check and load backup image manifest for the tables
     Path rootPath = new Path(backupRootDir);
-    HBackupFileSystem.checkImageManifestExist(backupManifestMap, sTableArray, conf, rootPath,
-      backupId);
+    BackupManifest manifest = HBackupFileSystem.getManifest(conf, rootPath, backupId);
 
-    restore(backupManifestMap, sTableArray, tTableArray, isOverwrite);
+    restore(manifest, sTableArray, tTableArray, isOverwrite);
   }
 }

hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/TableBackupClient.java

@@ -19,7 +19,6 @@
 
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import org.apache.hadoop.conf.Configuration;
@@ -268,7 +267,7 @@ public static void cleanupAndRestoreBackupSystem(Connection conn, BackupInfo bac
   }
 
   /**
-   * Add manifest for the current backup. The manifest is stored within the table backup directory.
+   * Creates a manifest based on the provided info, and store it in the backup-specific directory.
    * @param backupInfo The current backup info
    * @throws IOException exception
    */
@@ -277,43 +276,16 @@ protected void addManifest(BackupInfo backupInfo, BackupManager backupManager, B
     // set the overall backup phase : store manifest
     backupInfo.setPhase(BackupPhase.STORE_MANIFEST);
 
-    BackupManifest manifest;
-
-    // Since we have each table's backup in its own directory structure,
-    // we'll store its manifest with the table directory.
-    for (TableName table : backupInfo.getTables()) {
-      manifest = new BackupManifest(backupInfo, table);
-      ArrayList<BackupImage> ancestors = backupManager.getAncestors(backupInfo, table);
-      for (BackupImage image : ancestors) {
-        manifest.addDependentImage(image);
-      }
-
-      if (type == BackupType.INCREMENTAL) {
-        // We'll store the log timestamps for this table only in its manifest.
-        Map<TableName, Map<String, Long>> tableTimestampMap = new HashMap<>();
-        tableTimestampMap.put(table, backupInfo.getIncrTimestampMap().get(table));
-        manifest.setIncrTimestampMap(tableTimestampMap);
-        ArrayList<BackupImage> ancestorss = backupManager.getAncestors(backupInfo);
-        for (BackupImage image : ancestorss) {
-          manifest.addDependentImage(image);
-        }
-      }
-      manifest.store(conf);
-    }
-
-    // For incremental backup, we store a overall manifest in
-    // <backup-root-dir>/WALs/<backup-id>
-    // This is used when created the next incremental backup
+    BackupManifest manifest = new BackupManifest(backupInfo);
     if (type == BackupType.INCREMENTAL) {
-      manifest = new BackupManifest(backupInfo);
       // set the table region server start and end timestamps for incremental backup
       manifest.setIncrTimestampMap(backupInfo.getIncrTimestampMap());
-      ArrayList<BackupImage> ancestors = backupManager.getAncestors(backupInfo);
-      for (BackupImage image : ancestors) {
-        manifest.addDependentImage(image);
-      }
-      manifest.store(conf);
     }
+    ArrayList<BackupImage> ancestors = backupManager.getAncestors(backupInfo);
+    for (BackupImage image : ancestors) {
+      manifest.addDependentImage(image);
+    }
+    manifest.store(conf);
   }
 
   /**

hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/util/BackupUtils.java

@@ -664,15 +664,14 @@ public static RestoreRequest createRestoreRequest(String backupRootDir, String b
     return request;
   }
 
-  public static boolean validate(HashMap<TableName, BackupManifest> backupManifestMap,
+  public static boolean validate(List<TableName> tables, BackupManifest backupManifest,
     Configuration conf) throws IOException {
     boolean isValid = true;
 
-    for (Entry<TableName, BackupManifest> manifestEntry : backupManifestMap.entrySet()) {
-      TableName table = manifestEntry.getKey();
+    for (TableName table : tables) {
       TreeSet<BackupImage> imageSet = new TreeSet<>();
 
-      ArrayList<BackupImage> depList = manifestEntry.getValue().getDependentListByTable(table);
+      ArrayList<BackupImage> depList = backupManifest.getDependentListByTable(table);
       if (depList != null && !depList.isEmpty()) {
         imageSet.addAll(depList);
       }

hbase-backup/src/test/java/org/apache/hadoop/hbase/backup/TestFullBackup.java

@@ -17,10 +17,14 @@
  */
 package org.apache.hadoop.hbase.backup;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import java.util.HashSet;
 import java.util.List;
+import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.backup.impl.BackupManifest;
 import org.apache.hadoop.hbase.backup.impl.BackupSystemTable;
 import org.apache.hadoop.hbase.testclassification.LargeTests;
 import org.apache.hadoop.util.ToolRunner;
@@ -30,6 +34,8 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
+
 @Category(LargeTests.class)
 public class TestFullBackup extends TestBackupBase {
 
@@ -56,6 +62,11 @@ public void testFullBackupMultipleCommand() throws Exception {
         String backupId = data.getBackupId();
         assertTrue(checkSucceeded(backupId));
       }
+
+      BackupInfo newestBackup = backups.get(0);
+      BackupManifest manifest =
+        HBackupFileSystem.getManifest(conf1, new Path(BACKUP_ROOT_DIR), newestBackup.getBackupId());
+      assertEquals(Sets.newHashSet(table1, table2), new HashSet<>(manifest.getTableList()));
     }
     LOG.info("backup complete");
   }

hbase-backup/src/test/java/org/apache/hadoop/hbase/backup/TestIncrementalBackup.java

@@ -17,16 +17,20 @@
  */
 package org.apache.hadoop.hbase.backup;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.HashSet;
 import java.util.List;
+import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.HBaseClassTestRule;
 import org.apache.hadoop.hbase.HBaseTestingUtil;
 import org.apache.hadoop.hbase.SingleProcessHBaseCluster;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.backup.impl.BackupAdminImpl;
+import org.apache.hadoop.hbase.backup.impl.BackupManifest;
 import org.apache.hadoop.hbase.backup.util.BackupUtils;
 import org.apache.hadoop.hbase.client.Admin;
 import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
@@ -50,6 +54,7 @@
 import org.slf4j.LoggerFactory;
 
 import org.apache.hbase.thirdparty.com.google.common.collect.Lists;
+import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
 
 @Category(LargeTests.class)
 @RunWith(Parameterized.class)
@@ -148,6 +153,9 @@ public void TestIncBackupRestore() throws Exception {
       request = createBackupRequest(BackupType.INCREMENTAL, tables, BACKUP_ROOT_DIR);
       String backupIdIncMultiple = client.backupTables(request);
       assertTrue(checkSucceeded(backupIdIncMultiple));
+      BackupManifest manifest =
+        HBackupFileSystem.getManifest(conf1, new Path(BACKUP_ROOT_DIR), backupIdIncMultiple);
+      assertEquals(Sets.newHashSet(table1, table2), new HashSet<>(manifest.getTableList()));
 
       // add column family f2 to table1
       // drop column family f3