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17 package org.apache.hadoop.hbase.util;
18
19 import java.io.IOException;
20
21 import org.apache.commons.cli.CommandLine;
22 import org.apache.commons.logging.Log;
23 import org.apache.commons.logging.LogFactory;
24 import org.apache.hadoop.hbase.HBaseTestingUtility;
25 import org.apache.hadoop.hbase.HConstants;
26 import org.apache.hadoop.hbase.TableName;
27 import org.apache.hadoop.hbase.client.HTable;
28 import org.apache.hadoop.hbase.client.Result;
29 import org.apache.hadoop.hbase.client.ResultScanner;
30 import org.apache.hadoop.hbase.client.Scan;
31 import org.apache.hadoop.hbase.io.compress.Compression;
32 import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
33 import org.apache.hadoop.hbase.util.test.LoadTestDataGenerator;
34
35
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38
39
40 public class RestartMetaTest extends AbstractHBaseTool {
41
42 private static final Log LOG = LogFactory.getLog(RestartMetaTest.class);
43
44
45 private static final int DEFAULT_NUM_RS = 2;
46
47
48 private static TableName TABLE_NAME =
49 TableName.valueOf("load_test");
50
51
52 private static final int SLEEP_SEC_AFTER_DATA_LOAD = 5;
53
54
55 private int numRegionServers;
56
57 private static final String OPT_NUM_RS = "num_rs";
58
59 private static final int NUM_DATANODES = 3;
60
61
62 private void loadData() throws IOException {
63 long startKey = 0;
64 long endKey = 100000;
65 int minColsPerKey = 5;
66 int maxColsPerKey = 15;
67 int minColDataSize = 256;
68 int maxColDataSize = 256 * 3;
69 int numThreads = 10;
70
71
72 System.out.printf("Key range %d .. %d\n", startKey, endKey);
73 System.out.printf("Number of Columns/Key: %d..%d\n", minColsPerKey,
74 maxColsPerKey);
75 System.out.printf("Data Size/Column: %d..%d bytes\n", minColDataSize,
76 maxColDataSize);
77 System.out.printf("Client Threads: %d\n", numThreads);
78
79
80 LoadTestDataGenerator dataGen = new MultiThreadedAction.DefaultDataGenerator(
81 minColDataSize, maxColDataSize, minColsPerKey, maxColsPerKey, LoadTestTool.COLUMN_FAMILY);
82 MultiThreadedWriter writer = new MultiThreadedWriter(dataGen, conf, TABLE_NAME);
83 writer.setMultiPut(true);
84 writer.start(startKey, endKey, numThreads);
85 System.out.printf("Started loading data...");
86 writer.waitForFinish();
87 System.out.printf("Finished loading data...");
88 }
89
90 @Override
91 protected int doWork() throws Exception {
92 ProcessBasedLocalHBaseCluster hbaseCluster =
93 new ProcessBasedLocalHBaseCluster(conf, NUM_DATANODES, numRegionServers);
94 hbaseCluster.startMiniDFS();
95
96
97 hbaseCluster.startHBase();
98
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100 HBaseTestingUtility.createPreSplitLoadTestTable(conf, TABLE_NAME,
101 LoadTestTool.COLUMN_FAMILY, Compression.Algorithm.NONE,
102 DataBlockEncoding.NONE);
103
104 LOG.debug("Loading data....\n\n");
105 loadData();
106
107 LOG.debug("Sleeping for " + SLEEP_SEC_AFTER_DATA_LOAD +
108 " seconds....\n\n");
109 Threads.sleep(5 * SLEEP_SEC_AFTER_DATA_LOAD);
110
111 int metaRSPort = HBaseTestingUtility.getMetaRSPort(conf);
112
113 LOG.debug("Killing hbase:meta region server running on port " + metaRSPort);
114 hbaseCluster.killRegionServer(metaRSPort);
115 Threads.sleep(2000);
116
117 LOG.debug("Restarting region server running on port metaRSPort");
118 hbaseCluster.startRegionServer(metaRSPort);
119 Threads.sleep(2000);
120
121 LOG.debug("Trying to scan meta");
122
123 HTable metaTable = new HTable(conf, TableName.META_TABLE_NAME);
124 ResultScanner scanner = metaTable.getScanner(new Scan());
125 Result result;
126 while ((result = scanner.next()) != null) {
127 LOG.info("Region assignment from META: "
128 + Bytes.toStringBinary(result.getRow())
129 + " => "
130 + Bytes.toStringBinary(result.getFamilyMap(HConstants.CATALOG_FAMILY)
131 .get(HConstants.SERVER_QUALIFIER)));
132 }
133 return 0;
134 }
135
136 @Override
137 protected void addOptions() {
138 addOptWithArg(OPT_NUM_RS, "Number of Region Servers");
139 addOptWithArg(LoadTestTool.OPT_DATA_BLOCK_ENCODING,
140 LoadTestTool.OPT_DATA_BLOCK_ENCODING_USAGE);
141 }
142
143 @Override
144 protected void processOptions(CommandLine cmd) {
145 numRegionServers = Integer.parseInt(cmd.getOptionValue(OPT_NUM_RS,
146 String.valueOf(DEFAULT_NUM_RS)));
147 }
148
149 public static void main(String[] args) {
150 new RestartMetaTest().doStaticMain(args);
151 }
152
153 }