/* * 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.hbase; import java.io.IOException; import java.util.List; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.client.Connection; import org.apache.hadoop.hbase.client.ConnectionFactory; import org.apache.hadoop.hbase.client.Delete; import org.apache.hadoop.hbase.client.RegionInfo; import org.apache.hadoop.hbase.client.Table; import org.apache.hadoop.hbase.util.Bytes; import org.apache.yetus.audience.InterfaceAudience; /** * This class is strictly for usage with hbck2 testing tool located at dev-support/testingtool */ @InterfaceAudience.Private public class HBCKActions { private Configuration conf; public HBCKActions(Configuration conf) { this.conf = conf; } public static void main(String[] args) throws InterruptedException, IOException { Configuration conf = HBaseConfiguration.create(); HBCKActions tool = new HBCKActions(conf); if (args.length < 1 || args[0].equals("help")) { printUsageAndExit(); } if (args[0].equals("deleteRegionFromMeta")) { if (args.length != 2) { System.err.println("ERROR: Number of parameters not correct"); printUsageAndExit(); } String tableName = args[1]; tool.deleteRegionFromMeta(tableName); } else { System.err.println("ERROR: Unknown option passed."); printUsageAndExit(); } } private static void printUsageAndExit() { System.err.println("hbckActions <options>"); System.err.println("OPTIONS:"); System.err.println("help"); System.err.println(" Prints this help message.\n"); System.err.println("deleteRegionFromMeta <tableName>"); System.err.println(" Deletes the middle region from the regions of the\n" + " given table from Meta table. Removes whole of the\n" + " info column family"); System.exit(1); } /** * Deletes the middle region from the regions of the given table from Meta table * Removes whole of the "info" column family */ private void deleteRegionFromMeta(String tname) throws IOException, InterruptedException { TableName tn = TableName.valueOf(tname); try (Connection connection = ConnectionFactory.createConnection(conf)) { Table metaTable = connection.getTable(TableName.valueOf("hbase:meta")); List<RegionInfo> ris = HBCKMetaTableAccessor.getTableRegions(connection, tn); System.out.println(String.format("Current Regions of the table " + tn.getNameAsString() + " in Meta before deletion of the region are: " + ris)); RegionInfo ri = ris.get(ris.size() / 2); System.out.println("Deleting Region " + ri.getRegionNameAsString()); byte[] key = HBCKMetaTableAccessor.getMetaKeyForRegion(ri); Delete delete = new Delete(key); delete.addFamily(Bytes.toBytes("info")); metaTable.delete(delete); Thread.sleep(500); ris = HBCKMetaTableAccessor.getTableRegions(connection, tn); System.out.println("Current Regions of the table " + tn.getNameAsString() + " in Meta after deletion of the region are: " + ris); } } }