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<h2 title="Class MasterRegionServerList" class="title">Class MasterRegionServerList</h2>
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<li>org.apache.hadoop.hbase.master.MasterRegionServerList</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html" title="interface in org.apache.hadoop.hbase.master">RegionServerList</a></dd>
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<pre>@InterfaceAudience.Private
public class <a href="../../../../../src-html/org/apache/hadoop/hbase/master/MasterRegionServerList.html#line.53">MasterRegionServerList</a>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html" title="interface in org.apache.hadoop.hbase.master">RegionServerList</a></pre>
<div class="block"><a href="../../../../../org/apache/hadoop/hbase/master/region/MasterRegion.html" title="class in org.apache.hadoop.hbase.master.region"><code>MasterRegion</code></a> based <a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html" title="interface in org.apache.hadoop.hbase.master"><code>RegionServerList</code></a>.
<p/>
This is useful when we want to restart a cluster with only the data on file system, as when
restarting, we need to get the previous live region servers for scheduling SCP. Before we have
this class, we need to scan the WAL directory on WAL file system to find out the previous live
region servers, which means we can not restart a cluster without the previous WAL file system,
even if we have flushed all the data.
<p/>
Please see HBASE-26245 for more details.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/MasterRegionServerList.html#abortable">abortable</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private static org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/MasterRegionServerList.html#LOG">LOG</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/master/region/MasterRegion.html" title="class in org.apache.hadoop.hbase.master.region">MasterRegion</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/MasterRegionServerList.html#region">region</a></span></code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/MasterRegionServerList.html#MasterRegionServerList-org.apache.hadoop.hbase.master.region.MasterRegion-org.apache.hadoop.hbase.Abortable-">MasterRegionServerList</a></span>(<a href="../../../../../org/apache/hadoop/hbase/master/region/MasterRegion.html" title="class in org.apache.hadoop.hbase.master.region">MasterRegion</a>&nbsp;region,
<a href="../../../../../org/apache/hadoop/hbase/Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a>&nbsp;abortable)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/MasterRegionServerList.html#expired-org.apache.hadoop.hbase.ServerName-">expired</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;sn)</code>
<div class="block">Called when a region server is dead.</div>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/MasterRegionServerList.html#getAll--">getAll</a></span>()</code>
<div class="block">Get all live region servers.</div>
</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/MasterRegionServerList.html#started-org.apache.hadoop.hbase.ServerName-">started</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;sn)</code>
<div class="block">Called when a region server join the cluster.</div>
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<pre>private static final&nbsp;org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/master/MasterRegionServerList.html#line.55">LOG</a></pre>
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<pre>private final&nbsp;<a href="../../../../../org/apache/hadoop/hbase/master/region/MasterRegion.html" title="class in org.apache.hadoop.hbase.master.region">MasterRegion</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/master/MasterRegionServerList.html#line.57">region</a></pre>
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<pre>public&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/master/MasterRegionServerList.html#line.61">MasterRegionServerList</a>(<a href="../../../../../org/apache/hadoop/hbase/master/region/MasterRegion.html" title="class in org.apache.hadoop.hbase.master.region">MasterRegion</a>&nbsp;region,
<a href="../../../../../org/apache/hadoop/hbase/Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a>&nbsp;abortable)</pre>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/master/MasterRegionServerList.html#line.67">started</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;sn)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html#started-org.apache.hadoop.hbase.ServerName-">RegionServerList</a></code></span></div>
<div class="block">Called when a region server join the cluster.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html#started-org.apache.hadoop.hbase.ServerName-">started</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html" title="interface in org.apache.hadoop.hbase.master">RegionServerList</a></code></dd>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/master/MasterRegionServerList.html#line.82">expired</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&nbsp;sn)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html#expired-org.apache.hadoop.hbase.ServerName-">RegionServerList</a></code></span></div>
<div class="block">Called when a region server is dead.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html#expired-org.apache.hadoop.hbase.ServerName-">expired</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html" title="interface in org.apache.hadoop.hbase.master">RegionServerList</a></code></dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>&gt;&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/master/MasterRegionServerList.html#line.96">getAll</a>()
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html#getAll--">RegionServerList</a></code></span></div>
<div class="block">Get all live region servers.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html#getAll--">getAll</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerList.html" title="interface in org.apache.hadoop.hbase.master">RegionServerList</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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