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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.util;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.List;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.concurrent.Callable;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.HRegionLocation;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.ServerName;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.client.Admin;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.client.Connection;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.client.RegionInfo;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.client.ResultScanner;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.client.Scan;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.client.Table;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.filter.FirstKeyOnlyFilter;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.slf4j.Logger;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">035</span><span id="line-35"></span> |
| <span class="source-line-no">036</span><span id="line-36">/**</span> |
| <span class="source-line-no">037</span><span id="line-37"> * Move Regions and make sure that they are up on the target server.If a region movement fails we</span> |
| <span class="source-line-no">038</span><span id="line-38"> * exit as failure</span> |
| <span class="source-line-no">039</span><span id="line-39"> */</span> |
| <span class="source-line-no">040</span><span id="line-40">@InterfaceAudience.Private</span> |
| <span class="source-line-no">041</span><span id="line-41">class MoveWithAck implements Callable<Boolean> {</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43"> private static final Logger LOG = LoggerFactory.getLogger(MoveWithAck.class);</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45"> private final RegionInfo region;</span> |
| <span class="source-line-no">046</span><span id="line-46"> private final ServerName targetServer;</span> |
| <span class="source-line-no">047</span><span id="line-47"> private final List<RegionInfo> movedRegions;</span> |
| <span class="source-line-no">048</span><span id="line-48"> private final ServerName sourceServer;</span> |
| <span class="source-line-no">049</span><span id="line-49"> private final Connection conn;</span> |
| <span class="source-line-no">050</span><span id="line-50"> private final Admin admin;</span> |
| <span class="source-line-no">051</span><span id="line-51"></span> |
| <span class="source-line-no">052</span><span id="line-52"> MoveWithAck(Connection conn, RegionInfo regionInfo, ServerName sourceServer,</span> |
| <span class="source-line-no">053</span><span id="line-53"> ServerName targetServer, List<RegionInfo> movedRegions) throws IOException {</span> |
| <span class="source-line-no">054</span><span id="line-54"> this.conn = conn;</span> |
| <span class="source-line-no">055</span><span id="line-55"> this.region = regionInfo;</span> |
| <span class="source-line-no">056</span><span id="line-56"> this.targetServer = targetServer;</span> |
| <span class="source-line-no">057</span><span id="line-57"> this.movedRegions = movedRegions;</span> |
| <span class="source-line-no">058</span><span id="line-58"> this.sourceServer = sourceServer;</span> |
| <span class="source-line-no">059</span><span id="line-59"> this.admin = conn.getAdmin();</span> |
| <span class="source-line-no">060</span><span id="line-60"> }</span> |
| <span class="source-line-no">061</span><span id="line-61"></span> |
| <span class="source-line-no">062</span><span id="line-62"> @Override</span> |
| <span class="source-line-no">063</span><span id="line-63"> public Boolean call() throws IOException, InterruptedException {</span> |
| <span class="source-line-no">064</span><span id="line-64"> boolean moved = false;</span> |
| <span class="source-line-no">065</span><span id="line-65"> int count = 0;</span> |
| <span class="source-line-no">066</span><span id="line-66"> int retries = admin.getConfiguration().getInt(RegionMover.MOVE_RETRIES_MAX_KEY,</span> |
| <span class="source-line-no">067</span><span id="line-67"> RegionMover.DEFAULT_MOVE_RETRIES_MAX);</span> |
| <span class="source-line-no">068</span><span id="line-68"> int maxWaitInSeconds = admin.getConfiguration().getInt(RegionMover.MOVE_WAIT_MAX_KEY,</span> |
| <span class="source-line-no">069</span><span id="line-69"> RegionMover.DEFAULT_MOVE_WAIT_MAX);</span> |
| <span class="source-line-no">070</span><span id="line-70"> long startTime = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">071</span><span id="line-71"> boolean sameServer = true;</span> |
| <span class="source-line-no">072</span><span id="line-72"> // Assert we can scan the region in its current location</span> |
| <span class="source-line-no">073</span><span id="line-73"> isSuccessfulScan(region);</span> |
| <span class="source-line-no">074</span><span id="line-74"> LOG.info("Moving region: {} from {} to {}", region.getRegionNameAsString(), sourceServer,</span> |
| <span class="source-line-no">075</span><span id="line-75"> targetServer);</span> |
| <span class="source-line-no">076</span><span id="line-76"> while (count < retries && sameServer) {</span> |
| <span class="source-line-no">077</span><span id="line-77"> if (count > 0) {</span> |
| <span class="source-line-no">078</span><span id="line-78"> LOG.debug("Retry {} of maximum {} for region: {}", count, retries,</span> |
| <span class="source-line-no">079</span><span id="line-79"> region.getRegionNameAsString());</span> |
| <span class="source-line-no">080</span><span id="line-80"> }</span> |
| <span class="source-line-no">081</span><span id="line-81"> count = count + 1;</span> |
| <span class="source-line-no">082</span><span id="line-82"> admin.move(region.getEncodedNameAsBytes(), targetServer);</span> |
| <span class="source-line-no">083</span><span id="line-83"> long maxWait = startTime + (maxWaitInSeconds * 1000);</span> |
| <span class="source-line-no">084</span><span id="line-84"> while (EnvironmentEdgeManager.currentTime() < maxWait) {</span> |
| <span class="source-line-no">085</span><span id="line-85"> sameServer = isSameServer(region, sourceServer);</span> |
| <span class="source-line-no">086</span><span id="line-86"> if (!sameServer) {</span> |
| <span class="source-line-no">087</span><span id="line-87"> break;</span> |
| <span class="source-line-no">088</span><span id="line-88"> }</span> |
| <span class="source-line-no">089</span><span id="line-89"> Thread.sleep(1000);</span> |
| <span class="source-line-no">090</span><span id="line-90"> }</span> |
| <span class="source-line-no">091</span><span id="line-91"> }</span> |
| <span class="source-line-no">092</span><span id="line-92"> if (sameServer) {</span> |
| <span class="source-line-no">093</span><span id="line-93"> LOG.error("Region: {} stuck on {} for {} sec , newServer={}", region.getRegionNameAsString(),</span> |
| <span class="source-line-no">094</span><span id="line-94"> this.sourceServer, getTimeDiffInSec(startTime), this.targetServer);</span> |
| <span class="source-line-no">095</span><span id="line-95"> } else {</span> |
| <span class="source-line-no">096</span><span id="line-96"> isSuccessfulScan(region);</span> |
| <span class="source-line-no">097</span><span id="line-97"> LOG.info("Moved Region {} , cost (sec): {}", region.getRegionNameAsString(),</span> |
| <span class="source-line-no">098</span><span id="line-98"> getTimeDiffInSec(startTime));</span> |
| <span class="source-line-no">099</span><span id="line-99"> moved = true;</span> |
| <span class="source-line-no">100</span><span id="line-100"> movedRegions.add(region);</span> |
| <span class="source-line-no">101</span><span id="line-101"> }</span> |
| <span class="source-line-no">102</span><span id="line-102"> return moved;</span> |
| <span class="source-line-no">103</span><span id="line-103"> }</span> |
| <span class="source-line-no">104</span><span id="line-104"></span> |
| <span class="source-line-no">105</span><span id="line-105"> private static String getTimeDiffInSec(long startTime) {</span> |
| <span class="source-line-no">106</span><span id="line-106"> return String.format("%.3f", (float) (EnvironmentEdgeManager.currentTime() - startTime) / 1000);</span> |
| <span class="source-line-no">107</span><span id="line-107"> }</span> |
| <span class="source-line-no">108</span><span id="line-108"></span> |
| <span class="source-line-no">109</span><span id="line-109"> /**</span> |
| <span class="source-line-no">110</span><span id="line-110"> * Tries to scan a row from passed region</span> |
| <span class="source-line-no">111</span><span id="line-111"> */</span> |
| <span class="source-line-no">112</span><span id="line-112"> private void isSuccessfulScan(RegionInfo region) throws IOException {</span> |
| <span class="source-line-no">113</span><span id="line-113"> Scan scan = new Scan().withStartRow(region.getStartKey()).withStopRow(region.getEndKey(), false)</span> |
| <span class="source-line-no">114</span><span id="line-114"> .setRaw(true).setOneRowLimit().setMaxResultSize(1L).setCaching(1)</span> |
| <span class="source-line-no">115</span><span id="line-115"> .setFilter(new FirstKeyOnlyFilter()).setCacheBlocks(false);</span> |
| <span class="source-line-no">116</span><span id="line-116"> try (Table table = conn.getTable(region.getTable());</span> |
| <span class="source-line-no">117</span><span id="line-117"> ResultScanner scanner = table.getScanner(scan)) {</span> |
| <span class="source-line-no">118</span><span id="line-118"> scanner.next();</span> |
| <span class="source-line-no">119</span><span id="line-119"> } catch (IOException e) {</span> |
| <span class="source-line-no">120</span><span id="line-120"> LOG.error("Could not scan region: {}", region.getEncodedName(), e);</span> |
| <span class="source-line-no">121</span><span id="line-121"> throw e;</span> |
| <span class="source-line-no">122</span><span id="line-122"> }</span> |
| <span class="source-line-no">123</span><span id="line-123"> }</span> |
| <span class="source-line-no">124</span><span id="line-124"></span> |
| <span class="source-line-no">125</span><span id="line-125"> /**</span> |
| <span class="source-line-no">126</span><span id="line-126"> * Returns true if passed region is still on serverName when we look at hbase:meta.</span> |
| <span class="source-line-no">127</span><span id="line-127"> * @return true if region is hosted on serverName otherwise false</span> |
| <span class="source-line-no">128</span><span id="line-128"> */</span> |
| <span class="source-line-no">129</span><span id="line-129"> private boolean isSameServer(RegionInfo region, ServerName serverName) throws IOException {</span> |
| <span class="source-line-no">130</span><span id="line-130"> ServerName serverForRegion = getServerNameForRegion(region, admin, conn);</span> |
| <span class="source-line-no">131</span><span id="line-131"> return serverForRegion != null && serverForRegion.equals(serverName);</span> |
| <span class="source-line-no">132</span><span id="line-132"> }</span> |
| <span class="source-line-no">133</span><span id="line-133"></span> |
| <span class="source-line-no">134</span><span id="line-134"> /**</span> |
| <span class="source-line-no">135</span><span id="line-135"> * Get servername that is up in hbase:meta hosting the given region. this is hostname + port +</span> |
| <span class="source-line-no">136</span><span id="line-136"> * startcode comma-delimited. Can return null</span> |
| <span class="source-line-no">137</span><span id="line-137"> * @return regionServer hosting the given region</span> |
| <span class="source-line-no">138</span><span id="line-138"> */</span> |
| <span class="source-line-no">139</span><span id="line-139"> static ServerName getServerNameForRegion(RegionInfo region, Admin admin, Connection conn)</span> |
| <span class="source-line-no">140</span><span id="line-140"> throws IOException {</span> |
| <span class="source-line-no">141</span><span id="line-141"> if (!admin.isTableEnabled(region.getTable())) {</span> |
| <span class="source-line-no">142</span><span id="line-142"> return null;</span> |
| <span class="source-line-no">143</span><span id="line-143"> }</span> |
| <span class="source-line-no">144</span><span id="line-144"> HRegionLocation loc = conn.getRegionLocator(region.getTable())</span> |
| <span class="source-line-no">145</span><span id="line-145"> .getRegionLocation(region.getStartKey(), region.getReplicaId(), true);</span> |
| <span class="source-line-no">146</span><span id="line-146"> if (loc != null) {</span> |
| <span class="source-line-no">147</span><span id="line-147"> return loc.getServerName();</span> |
| <span class="source-line-no">148</span><span id="line-148"> } else {</span> |
| <span class="source-line-no">149</span><span id="line-149"> return null;</span> |
| <span class="source-line-no">150</span><span id="line-150"> }</span> |
| <span class="source-line-no">151</span><span id="line-151"> }</span> |
| <span class="source-line-no">152</span><span id="line-152"></span> |
| <span class="source-line-no">153</span><span id="line-153">}</span> |
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