itests/hive-unit/src/test/java/org/apache/hadoop/hive/ql/parse/TestCopyUtils.java

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 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
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 * 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
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 * 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.hive.ql.parse;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hive.metastore.conf.MetastoreConf;
import org.apache.hadoop.hive.shims.HadoopShims;
import org.apache.hadoop.hive.shims.ShimLoader;
import org.apache.hadoop.hive.shims.Utils;
import org.apache.hadoop.security.UserGroupInformation;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestName;
import org.junit.rules.TestRule;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import org.apache.hadoop.hive.shims.HadoopShims.MiniMrShim;
import static org.apache.hadoop.hive.common.repl.ReplConst.SOURCE_OF_REPLICATION;

public class TestCopyUtils {
  @Rule
  public final TestName testName = new TestName();

  @Rule
  public TestRule replV1BackwardCompat;

  protected static final Logger LOG = LoggerFactory.getLogger(TestReplicationScenarios.class);

  static class WarehouseInstanceWithMR extends WarehouseInstance {

    MiniMrShim mrCluster;

    WarehouseInstanceWithMR(Logger logger, MiniDFSCluster cluster,
        Map<String, String> overridesForHiveConf) throws Exception {
      super(logger, cluster, overridesForHiveConf);
      HadoopShims shims = ShimLoader.getHadoopShims();
      mrCluster = shims.getLocalMiniTezCluster(hiveConf, false);
      //      mrCluster = shims.getMiniMrCluster(hiveConf, 2,
      //          miniDFSCluster.getFileSystem().getUri().toString(), 1);

      mrCluster.setupConfiguration(hiveConf);
    }

    @Override
    public void close() throws IOException {
      mrCluster.shutdown();
      super.close();
    }
  }

  private static WarehouseInstanceWithMR primary, replica;

  @BeforeClass
  public static void classLevelSetup() throws Exception {
    Configuration conf = new Configuration();
    conf.set("dfs.client.use.datanode.hostname", "true");

    UserGroupInformation ugi = Utils.getUGI();
    final String currentUser = ugi.getShortUserName();
    conf.set("hadoop.proxyuser." + currentUser + ".hosts", "*");

    MiniDFSCluster miniDFSCluster =
        new MiniDFSCluster.Builder(conf).numDataNodes(1).format(true).build();
    HashMap<String, String> overridesForHiveConf = new HashMap<String, String>() {{
      put(ConfVars.HIVE_IN_TEST_REPL.varname, "true");
      put(ConfVars.HIVE_EXEC_COPYFILE_MAXSIZE.varname, "1");
      put(ConfVars.HIVE_SERVER2_ENABLE_DOAS.varname, "false");
      put(ConfVars.HIVE_DISTCP_DOAS_USER.varname, currentUser);
    }};
    primary = new WarehouseInstanceWithMR(LOG, miniDFSCluster, overridesForHiveConf);
    overridesForHiveConf.put(MetastoreConf.ConfVars.REPLDIR.getHiveName(), primary.repldDir);
    replica = new WarehouseInstanceWithMR(LOG, miniDFSCluster, overridesForHiveConf);
  }

  @AfterClass
  public static void classLevelTearDown() throws IOException {
    primary.close();
    replica.close();
  }

  private String primaryDbName, replicatedDbName;

  @Before
  public void setup() throws Throwable {
    replV1BackwardCompat = primary.getReplivationV1CompatRule(new ArrayList<>());
    primaryDbName = testName.getMethodName() + "_" + +System.currentTimeMillis();
    replicatedDbName = "replicated_" + primaryDbName;
    primary.run("create database " + primaryDbName + " WITH DBPROPERTIES ( '" +
            SOURCE_OF_REPLICATION + "' = '1,2,3')");
  }

  /**
   * We need to have to separate insert statements as we want the table to have two different data files.
   * This is required as one of the conditions for distcp to get invoked is to have more than 1 file.
   */
  @Test
  public void testPrivilegedDistCpWithSameUserAsCurrentDoesNotTryToImpersonate() throws Throwable {
    primary
        .run("use " + primaryDbName)
        .run("create table t1 (id int)")
        .run("insert into t1 values (1),(2),(3)")
        .run("insert into t1 values (11),(12),(13)")
        .dump(primaryDbName);

    /*
      We have to do a comparision on the data of table t1 in replicated database because even though the file
      copy will fail due to impersonation failure the driver will return a success code 0. May be something to look at later
    */
    replica.load(replicatedDbName, primaryDbName)
        .run("select * from " + replicatedDbName + ".t1")
        .verifyResults(Arrays.asList("1", "2", "3", "12", "11", "13"));
  }
}