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

/**
 * 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,
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 * See the License for the specific language governing permissions and
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package org.apache.hadoop.hbase.backup;

import static org.junit.Assert.assertTrue;

import java.util.List;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseClassTestRule;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.backup.impl.BackupSystemTable;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.testclassification.LargeTests;
import org.apache.hadoop.util.ToolRunner;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.hbase.thirdparty.com.google.common.collect.Lists;

@Category(LargeTests.class)
public class TestRepairAfterFailedDelete extends TestBackupBase {

  @ClassRule
  public static final HBaseClassTestRule CLASS_RULE =
      HBaseClassTestRule.forClass(TestRepairAfterFailedDelete.class);

  private static final Logger LOG = LoggerFactory.getLogger(TestRepairAfterFailedDelete.class);

  @Test
  public void testRepairBackupDelete() throws Exception {
    LOG.info("test repair backup delete on a single table with data");
    List<TableName> tableList = Lists.newArrayList(table1);
    String backupId = fullTableBackup(tableList);
    assertTrue(checkSucceeded(backupId));
    LOG.info("backup complete");
    String[] backupIds = new String[] { backupId };
    BackupSystemTable table = new BackupSystemTable(TEST_UTIL.getConnection());
    BackupInfo info = table.readBackupInfo(backupId);
    Path path = new Path(info.getBackupRootDir(), backupId);
    FileSystem fs = FileSystem.get(path.toUri(), conf1);
    assertTrue(fs.exists(path));

    // Snapshot backup system table before delete
    String snapshotName = "snapshot-backup";
    Connection conn = TEST_UTIL.getConnection();
    Admin admin = conn.getAdmin();
    admin.snapshot(snapshotName, BackupSystemTable.getTableName(conf1));

    int deleted = getBackupAdmin().deleteBackups(backupIds);

    assertTrue(!fs.exists(path));
    assertTrue(fs.exists(new Path(info.getBackupRootDir())));
    assertTrue(1 == deleted);

    // Emulate delete failure
    // Restore backup system table
    admin.disableTable(BackupSystemTable.getTableName(conf1));
    admin.restoreSnapshot(snapshotName);
    admin.enableTable(BackupSystemTable.getTableName(conf1));
    // Start backup session
    table.startBackupExclusiveOperation();
    // Start delete operation
    table.startDeleteOperation(backupIds);

    // Now run repair command to repair "failed" delete operation
    String[] args = new String[] {"repair"};
    // Run restore
    int ret = ToolRunner.run(conf1, new BackupDriver(), args);
    assertTrue(ret == 0);
    // Verify that history length == 0
    assertTrue(table.getBackupHistory().size() == 0);
    table.close();
    admin.close();
  }
}