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| <h2 title="Class RegionServerTracker" class="title">Class RegionServerTracker</h2> |
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| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">org.apache.hadoop.hbase.zookeeper.ZKListener</a></li> |
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| <li>org.apache.hadoop.hbase.master.RegionServerTracker</li> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/master/RegionServerTracker.html#line.62">RegionServerTracker</a> |
| extends <a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKListener</a></pre> |
| <div class="block">Tracks the online region servers via ZK. |
| <p/> |
| Handling of new RSs checking in is done via RPC. This class is only responsible for watching for |
| expired nodes. It handles listening for changes in the RS node list. The only exception is when |
| master restart, we will use the list fetched from zk to construct the initial set of live region |
| servers. |
| <p/> |
| If an RS node gets deleted, this automatically handles calling of |
| <a href="../../../../../org/apache/hadoop/hbase/master/ServerManager.html#expireServer-org.apache.hadoop.hbase.ServerName-"><code>ServerManager.expireServer(ServerName)</code></a></div> |
| </li> |
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| <h3>Field Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#executor">executor</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <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/RegionServerTracker.html#LOG">LOG</a></span></code> </td> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>private <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><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#regionServers">regionServers</a></span></code> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#server">server</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/master/ServerManager.html" title="class in org.apache.hadoop.hbase.master">ServerManager</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#serverManager">serverManager</a></span></code> </td> |
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| <h3>Fields inherited from class org.apache.hadoop.hbase.zookeeper.<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKListener</a></h3> |
| <code><a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html#watcher">watcher</a></code></li> |
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| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#RegionServerTracker-org.apache.hadoop.hbase.zookeeper.ZKWatcher-org.apache.hadoop.hbase.master.MasterServices-org.apache.hadoop.hbase.master.ServerManager-">RegionServerTracker</a></span>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> watcher, |
| <a href="../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a> server, |
| <a href="../../../../../org/apache/hadoop/hbase/master/ServerManager.html" title="class in org.apache.hadoop.hbase.master">ServerManager</a> serverManager)</code> </td> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>,org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.RegionServerInfo></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#getServerInfo-java.lang.String-">getServerInfo</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#nodeChildrenChanged-java.lang.String-">nodeChildrenChanged</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> path)</code> |
| <div class="block">Called when an existing node has a child node added or removed.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#refresh--">refresh</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#start-java.util.Set-java.util.Set-java.util.Set-">start</a></span>(<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><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> deadServersFromPE, |
| <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><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> liveServersFromWALDir, |
| <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><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> splittingServersFromWALDir)</code> |
| <div class="block">Starts the tracking of online RegionServers.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/master/RegionServerTracker.html#stop--">stop</a></span>()</code> </td> |
| </tr> |
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| <h3>Methods inherited from class org.apache.hadoop.hbase.zookeeper.<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKListener</a></h3> |
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| <pre>private static final org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/master/RegionServerTracker.html#line.63">LOG</a></pre> |
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| <pre>private final <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><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/master/RegionServerTracker.html#line.64">regionServers</a></pre> |
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| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/master/RegionServerTracker.html#line.72">RegionServerTracker</a>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> watcher, |
| <a href="../../../../../org/apache/hadoop/hbase/master/MasterServices.html" title="interface in org.apache.hadoop.hbase.master">MasterServices</a> server, |
| <a href="../../../../../org/apache/hadoop/hbase/master/ServerManager.html" title="class in org.apache.hadoop.hbase.master">ServerManager</a> serverManager)</pre> |
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| throws org.apache.zookeeper.KeeperException, |
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| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.zookeeper.KeeperException</code></dd> |
| <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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| <h4>start</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/master/RegionServerTracker.html#line.122">start</a>(<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><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> deadServersFromPE, |
| <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><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> liveServersFromWALDir, |
| <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><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> splittingServersFromWALDir) |
| throws org.apache.zookeeper.KeeperException, |
| <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">Starts the tracking of online RegionServers. All RSes will be tracked after this method is |
| called. |
| <p/> |
| In this method, we will also construct the region server sets in <a href="../../../../../org/apache/hadoop/hbase/master/ServerManager.html" title="class in org.apache.hadoop.hbase.master"><code>ServerManager</code></a>. If a |
| region server is dead between the crash of the previous master instance and the start of the |
| current master instance, we will schedule a SCP for it. This is done in |
| <a href="../../../../../org/apache/hadoop/hbase/master/ServerManager.html#findDeadServersAndProcess-java.util.Set-java.util.Set-"><code>ServerManager.findDeadServersAndProcess(Set, Set)</code></a>, we call it here under the lock |
| protection to prevent concurrency issues with server expiration operation.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>deadServersFromPE</code> - the region servers which already have SCP associated.</dd> |
| <dd><code>liveServersFromWALDir</code> - the live region servers from wal directory.</dd> |
| <dd><code>splittingServersFromWALDir</code> - Servers whose WALs are being actively 'split'.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.zookeeper.KeeperException</code></dd> |
| <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> |
| </dl> |
| </li> |
| </ul> |
| <a name="stop--"> |
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| <h4>stop</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/master/RegionServerTracker.html#line.157">stop</a>()</pre> |
| </li> |
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| <h4>refresh</h4> |
| <pre>private void <a href="../../../../../src-html/org/apache/hadoop/hbase/master/RegionServerTracker.html#line.161">refresh</a>()</pre> |
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| <h4>nodeChildrenChanged</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/master/RegionServerTracker.html#line.199">nodeChildrenChanged</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> path)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html#nodeChildrenChanged-java.lang.String-">ZKListener</a></code></span></div> |
| <div class="block">Called when an existing node has a child node added or removed.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html#nodeChildrenChanged-java.lang.String-">nodeChildrenChanged</a></code> in class <code><a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKListener</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>path</code> - full path of the node whose children have changed</dd> |
| </dl> |
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