rahulLiving commented on code in PR #2379: URL: https://github.com/apache/phoenix/pull/2379#discussion_r3007931088
########## phoenix-core-server/src/main/java/org/apache/phoenix/mapreduce/PhoenixSyncTableMapper.java: ########## @@ -0,0 +1,723 @@ +/* + * 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.phoenix.mapreduce; + +import static org.apache.phoenix.schema.types.PDataType.TRUE_BYTES; + +import java.io.IOException; +import java.security.MessageDigest; +import java.sql.Connection; +import java.sql.SQLException; +import java.sql.Timestamp; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.Cell; +import org.apache.hadoop.hbase.CellUtil; +import org.apache.hadoop.hbase.HConstants; +import org.apache.hadoop.hbase.client.Result; +import org.apache.hadoop.hbase.client.ResultScanner; +import org.apache.hadoop.hbase.client.Scan; +import org.apache.hadoop.hbase.client.Table; +import org.apache.hadoop.hbase.util.Bytes; +import org.apache.hadoop.hbase.util.Pair; +import org.apache.hadoop.io.NullWritable; +import org.apache.hadoop.mapreduce.Mapper; +import org.apache.hadoop.mapreduce.lib.db.DBInputFormat; +import org.apache.phoenix.coprocessorclient.BaseScannerRegionObserverConstants; +import org.apache.phoenix.jdbc.PhoenixConnection; +import org.apache.phoenix.mapreduce.util.ConnectionUtil; +import org.apache.phoenix.mapreduce.util.PhoenixConfigurationUtil; +import org.apache.phoenix.mapreduce.util.PhoenixMapReduceUtil; +import org.apache.phoenix.query.KeyRange; +import org.apache.phoenix.query.QueryServicesOptions; +import org.apache.phoenix.schema.PTable; +import org.apache.phoenix.util.MetaDataUtil; +import org.apache.phoenix.util.PhoenixRuntime; +import org.apache.phoenix.util.SHA256DigestUtil; +import org.apache.phoenix.util.ScanUtil; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.apache.phoenix.thirdparty.com.google.common.annotations.VisibleForTesting; + +/** + * Mapper that acts as a driver for validating table data between source and target clusters. The + * actual work of chunking and hashing is done server-side by the coprocessor. This mapper fetches + * chunk hashes from both clusters, compares them and write to checkpoint table. + */ +public class PhoenixSyncTableMapper + extends Mapper<NullWritable, DBInputFormat.NullDBWritable, NullWritable, NullWritable> { + + private static final Logger LOGGER = LoggerFactory.getLogger(PhoenixSyncTableMapper.class); + + public enum SyncCounters { + CHUNKS_VERIFIED, + CHUNKS_MISMATCHED, + SOURCE_ROWS_PROCESSED, + TARGET_ROWS_PROCESSED + } + + private String tableName; + private String targetZkQuorum; + private Long fromTime; + private Long toTime; + private boolean isDryRun; + private long chunkSizeBytes; + private Configuration conf; + private Connection sourceConnection; + private Connection targetConnection; + private Connection globalConnection; + private PTable pTable; + private byte[] physicalTableName; + private byte[] mapperRegionStart; + private byte[] mapperRegionEnd; + private PhoenixSyncTableOutputRepository syncTableOutputRepository; + private Timestamp mapperStartTime; + + @Override + protected void setup(Context context) throws InterruptedException { + try { + super.setup(context); + mapperStartTime = new Timestamp(System.currentTimeMillis()); + this.conf = context.getConfiguration(); + tableName = PhoenixConfigurationUtil.getPhoenixSyncTableName(conf); + targetZkQuorum = PhoenixConfigurationUtil.getPhoenixSyncTableTargetZkQuorum(conf); + fromTime = PhoenixConfigurationUtil.getPhoenixSyncTableFromTime(conf); + toTime = PhoenixConfigurationUtil.getPhoenixSyncTableToTime(conf); + isDryRun = PhoenixConfigurationUtil.getPhoenixSyncTableDryRun(conf); + chunkSizeBytes = PhoenixConfigurationUtil.getPhoenixSyncTableChunkSizeBytes(conf); + extractRegionBoundariesFromSplit(context); + sourceConnection = ConnectionUtil.getInputConnection(conf); + pTable = sourceConnection.unwrap(PhoenixConnection.class).getTable(tableName); + physicalTableName = pTable.getPhysicalName().getBytes(); + connectToTargetCluster(); + globalConnection = createGlobalConnection(conf); + syncTableOutputRepository = new PhoenixSyncTableOutputRepository(globalConnection); + } catch (SQLException | IOException e) { Review Comment: Let me `Exception` to be safe -- This is an automated message from the Apache Git Service. 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