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+<title>FastLeaderElection (Apache ZooKeeper - Server 3.8.1 API)</title>
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+<li>Summary:&nbsp;</li>
+<li><a href="#nested.class.summary">Nested</a>&nbsp;|&nbsp;</li>
+<li><a href="#field.summary">Field</a>&nbsp;|&nbsp;</li>
+<li><a href="#constructor.summary">Constr</a>&nbsp;|&nbsp;</li>
+<li><a href="#method.summary">Method</a></li>
+</ul>
+<ul class="subNavList">
+<li>Detail:&nbsp;</li>
+<li><a href="#field.detail">Field</a>&nbsp;|&nbsp;</li>
+<li><a href="#constructor.detail">Constr</a>&nbsp;|&nbsp;</li>
+<li><a href="#method.detail">Method</a></li>
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+<!-- ======== START OF CLASS DATA ======== -->
+<div class="header">
+<div class="subTitle">org.apache.zookeeper.server.quorum</div>
+<h2 title="Class FastLeaderElection" class="title">Class FastLeaderElection</h2>
+</div>
+<div class="contentContainer">
+<ul class="inheritance">
+<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
+<li>
+<ul class="inheritance">
+<li>org.apache.zookeeper.server.quorum.FastLeaderElection</li>
+</ul>
+</li>
+</ul>
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt>All Implemented Interfaces:</dt>
+<dd><a href="../../../../../org/apache/zookeeper/server/quorum/Election.html" title="interface in org.apache.zookeeper.server.quorum">Election</a></dd>
+</dl>
+<hr>
+<br>
+<pre>public class <span class="typeNameLabel">FastLeaderElection</span>
+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/zookeeper/server/quorum/Election.html" title="interface in org.apache.zookeeper.server.quorum">Election</a></pre>
+<div class="block">Implementation of leader election using TCP. It uses an object of the class
+ QuorumCnxManager to manage connections. Otherwise, the algorithm is push-based
+ as with the other UDP implementations.
+
+ There are a few parameters that can be tuned to change its behavior. First,
+ finalizeWait determines the amount of time to wait until deciding upon a leader.
+ This is part of the leader election algorithm.</div>
+</li>
+</ul>
+</div>
+<div class="summary">
+<ul class="blockList">
+<li class="blockList">
+<!-- ======== NESTED CLASS SUMMARY ======== -->
+<ul class="blockList">
+<li class="blockList"><a name="nested.class.summary">
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+</a>
+<h3>Nested Class Summary</h3>
+<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Nested Class Summary table, listing nested classes, and an explanation">
+<caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Class and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code>protected class&nbsp;</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.Messenger.html" title="class in org.apache.zookeeper.server.quorum">FastLeaderElection.Messenger</a></span></code>
+<div class="block">Multi-threaded implementation of message handler.</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code>static class&nbsp;</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.Notification.html" title="class in org.apache.zookeeper.server.quorum">FastLeaderElection.Notification</a></span></code>
+<div class="block">Notifications are messages that let other peers know that
+ a given peer has changed its vote, either because it has
+ joined leader election or because it learned of another
+ peer with higher zxid or same zxid and higher server id</div>
+</td>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code>static class&nbsp;</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.ToSend.html" title="class in org.apache.zookeeper.server.quorum">FastLeaderElection.ToSend</a></span></code>
+<div class="block">Messages that a peer wants to send to other peers.</div>
+</td>
+</tr>
+</table>
+</li>
+</ul>
+<!-- =========== FIELD SUMMARY =========== -->
+<ul class="blockList">
+<li class="blockList"><a name="field.summary">
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+</a>
+<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">&nbsp;</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>static <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></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#MAX_NOTIFICATION_INTERVAL">MAX_NOTIFICATION_INTERVAL</a></span></code>
+<div class="block">Maximum notification interval, default is 60s</div>
+</td>
+</tr>
+<tr class="rowColor">
+<td class="colFirst"><code>static <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></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#MIN_NOTIFICATION_INTERVAL">MIN_NOTIFICATION_INTERVAL</a></span></code>
+<div class="block">Minimum notification interval, default is equal to finalizeWait</div>
+</td>
+</tr>
+</table>
+</li>
+</ul>
+<!-- ======== CONSTRUCTOR SUMMARY ======== -->
+<ul class="blockList">
+<li class="blockList"><a name="constructor.summary">
+<!-- -->
+</a>
+<h3>Constructor Summary</h3>
+<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
+<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
+<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/zookeeper/server/quorum/FastLeaderElection.html#FastLeaderElection-org.apache.zookeeper.server.quorum.QuorumPeer-org.apache.zookeeper.server.quorum.QuorumCnxManager-">FastLeaderElection</a></span>(<a href="../../../../../org/apache/zookeeper/server/quorum/QuorumPeer.html" title="class in org.apache.zookeeper.server.quorum">QuorumPeer</a>&nbsp;self,
+ <a href="../../../../../org/apache/zookeeper/server/quorum/QuorumCnxManager.html" title="class in org.apache.zookeeper.server.quorum">QuorumCnxManager</a>&nbsp;manager)</code>
+<div class="block">Constructor of FastLeaderElection.</div>
+</td>
+</tr>
+</table>
+</li>
+</ul>
+<!-- ========== METHOD SUMMARY =========== -->
+<ul class="blockList">
+<li class="blockList"><a name="method.summary">
+<!-- -->
+</a>
+<h3>Method Summary</h3>
+<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
+<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
+<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>protected boolean</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#checkLeader-java.util.Map-long-long-">checkLeader</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>,<a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a>&gt;&nbsp;votes,
+ long&nbsp;leader,
+ long&nbsp;electionEpoch)</code>
+<div class="block">In the case there is a leader elected, and a quorum supporting
+ this leader, we have to check if the leader has voted and acked
+ that it is leading.</div>
+</td>
+</tr>
+<tr id="i1" class="rowColor">
+<td class="colFirst"><code><a href="../../../../../org/apache/zookeeper/server/quorum/QuorumCnxManager.html" title="class in org.apache.zookeeper.server.quorum">QuorumCnxManager</a></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#getCnxManager--">getCnxManager</a></span>()</code>&nbsp;</td>
+</tr>
+<tr id="i2" class="altColor">
+<td class="colFirst"><code>long</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#getLogicalClock--">getLogicalClock</a></span>()</code>
+<div class="block">Returns the current value of the logical clock counter</div>
+</td>
+</tr>
+<tr id="i3" class="rowColor">
+<td class="colFirst"><code><a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#getVote--">getVote</a></span>()</code>&nbsp;</td>
+</tr>
+<tr id="i4" class="altColor">
+<td class="colFirst"><code>protected <a href="../../../../../org/apache/zookeeper/server/quorum/SyncedLearnerTracker.html" title="class in org.apache.zookeeper.server.quorum">SyncedLearnerTracker</a></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#getVoteTracker-java.util.Map-org.apache.zookeeper.server.quorum.Vote-">getVoteTracker</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>,<a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a>&gt;&nbsp;votes,
+ <a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a>&nbsp;vote)</code>
+<div class="block">Given a set of votes, return the SyncedLearnerTracker which is used to
+ determines if have sufficient to declare the end of the election round.</div>
+</td>
+</tr>
+<tr id="i5" class="rowColor">
+<td class="colFirst"><code><a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a></code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#lookForLeader--">lookForLeader</a></span>()</code>
+<div class="block">Starts a new round of leader election.</div>
+</td>
+</tr>
+<tr id="i6" class="altColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#shutdown--">shutdown</a></span>()</code>&nbsp;</td>
+</tr>
+<tr id="i7" class="rowColor">
+<td class="colFirst"><code>void</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#start--">start</a></span>()</code>
+<div class="block">This method starts the sender and receiver threads.</div>
+</td>
+</tr>
+<tr id="i8" class="altColor">
+<td class="colFirst"><code>protected boolean</code></td>
+<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/zookeeper/server/quorum/FastLeaderElection.html#totalOrderPredicate-long-long-long-long-long-long-">totalOrderPredicate</a></span>(long&nbsp;newId,
+ long&nbsp;newZxid,
+ long&nbsp;newEpoch,
+ long&nbsp;curId,
+ long&nbsp;curZxid,
+ long&nbsp;curEpoch)</code>
+<div class="block">Check if a pair (server id, zxid) succeeds our
+ current vote.</div>
+</td>
+</tr>
+</table>
+<ul class="blockList">
+<li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
+<!-- -->
+</a>
+<h3>Methods inherited from class&nbsp;java.lang.<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></h3>
+<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="details">
+<ul class="blockList">
+<li class="blockList">
+<!-- ============ FIELD DETAIL =========== -->
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+<li class="blockList"><a name="field.detail">
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+<pre>public static final&nbsp;<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> MIN_NOTIFICATION_INTERVAL</pre>
+<div class="block">Minimum notification interval, default is equal to finalizeWait</div>
+<dl>
+<dt><span class="seeLabel">See Also:</span></dt>
+<dd><a href="../../../../../constant-values.html#org.apache.zookeeper.server.quorum.FastLeaderElection.MIN_NOTIFICATION_INTERVAL">Constant Field Values</a></dd>
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+<div class="block">Maximum notification interval, default is 60s</div>
+<dl>
+<dt><span class="seeLabel">See Also:</span></dt>
+<dd><a href="../../../../../constant-values.html#org.apache.zookeeper.server.quorum.FastLeaderElection.MAX_NOTIFICATION_INTERVAL">Constant Field Values</a></dd>
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+</ul>
+<!-- ========= CONSTRUCTOR DETAIL ======== -->
+<ul class="blockList">
+<li class="blockList"><a name="constructor.detail">
+<!-- -->
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+<h3>Constructor Detail</h3>
+<a name="FastLeaderElection-org.apache.zookeeper.server.quorum.QuorumPeer-org.apache.zookeeper.server.quorum.QuorumCnxManager-">
+<!-- -->
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+<h4>FastLeaderElection</h4>
+<pre>public&nbsp;FastLeaderElection(<a href="../../../../../org/apache/zookeeper/server/quorum/QuorumPeer.html" title="class in org.apache.zookeeper.server.quorum">QuorumPeer</a>&nbsp;self,
+ <a href="../../../../../org/apache/zookeeper/server/quorum/QuorumCnxManager.html" title="class in org.apache.zookeeper.server.quorum">QuorumCnxManager</a>&nbsp;manager)</pre>
+<div class="block">Constructor of FastLeaderElection. It takes two parameters, one
+ is the QuorumPeer object that instantiated this object, and the other
+ is the connection manager. Such an object should be created only once
+ by each peer during an instance of the ZooKeeper service.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>self</code> - QuorumPeer that created this object</dd>
+<dd><code>manager</code> - Connection manager</dd>
+</dl>
+</li>
+</ul>
+</li>
+</ul>
+<!-- ============ METHOD DETAIL ========== -->
+<ul class="blockList">
+<li class="blockList"><a name="method.detail">
+<!-- -->
+</a>
+<h3>Method Detail</h3>
+<a name="getLogicalClock--">
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+<li class="blockList">
+<h4>getLogicalClock</h4>
+<pre>public&nbsp;long&nbsp;getLogicalClock()</pre>
+<div class="block">Returns the current value of the logical clock counter</div>
+</li>
+</ul>
+<a name="start--">
+<!-- -->
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+<ul class="blockList">
+<li class="blockList">
+<h4>start</h4>
+<pre>public&nbsp;void&nbsp;start()</pre>
+<div class="block">This method starts the sender and receiver threads.</div>
+</li>
+</ul>
+<a name="getCnxManager--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getCnxManager</h4>
+<pre>public&nbsp;<a href="../../../../../org/apache/zookeeper/server/quorum/QuorumCnxManager.html" title="class in org.apache.zookeeper.server.quorum">QuorumCnxManager</a>&nbsp;getCnxManager()</pre>
+</li>
+</ul>
+<a name="shutdown--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>shutdown</h4>
+<pre>public&nbsp;void&nbsp;shutdown()</pre>
+<dl>
+<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
+<dd><code><a href="../../../../../org/apache/zookeeper/server/quorum/Election.html#shutdown--">shutdown</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/zookeeper/server/quorum/Election.html" title="interface in org.apache.zookeeper.server.quorum">Election</a></code></dd>
+</dl>
+</li>
+</ul>
+<a name="totalOrderPredicate-long-long-long-long-long-long-">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>totalOrderPredicate</h4>
+<pre>protected&nbsp;boolean&nbsp;totalOrderPredicate(long&nbsp;newId,
+ long&nbsp;newZxid,
+ long&nbsp;newEpoch,
+ long&nbsp;curId,
+ long&nbsp;curZxid,
+ long&nbsp;curEpoch)</pre>
+<div class="block">Check if a pair (server id, zxid) succeeds our
+ current vote.</div>
+</li>
+</ul>
+<a name="getVoteTracker-java.util.Map-org.apache.zookeeper.server.quorum.Vote-">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getVoteTracker</h4>
+<pre>protected&nbsp;<a href="../../../../../org/apache/zookeeper/server/quorum/SyncedLearnerTracker.html" title="class in org.apache.zookeeper.server.quorum">SyncedLearnerTracker</a>&nbsp;getVoteTracker(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>,<a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a>&gt;&nbsp;votes,
+ <a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a>&nbsp;vote)</pre>
+<div class="block">Given a set of votes, return the SyncedLearnerTracker which is used to
+ determines if have sufficient to declare the end of the election round.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>votes</code> - Set of votes</dd>
+<dd><code>vote</code> - Identifier of the vote received last</dd>
+<dt><span class="returnLabel">Returns:</span></dt>
+<dd>the SyncedLearnerTracker with vote details</dd>
+</dl>
+</li>
+</ul>
+<a name="checkLeader-java.util.Map-long-long-">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>checkLeader</h4>
+<pre>protected&nbsp;boolean&nbsp;checkLeader(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a>,<a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a>&gt;&nbsp;votes,
+ long&nbsp;leader,
+ long&nbsp;electionEpoch)</pre>
+<div class="block">In the case there is a leader elected, and a quorum supporting
+ this leader, we have to check if the leader has voted and acked
+ that it is leading. We need this check to avoid that peers keep
+ electing over and over a peer that has crashed and it is no
+ longer leading.</div>
+<dl>
+<dt><span class="paramLabel">Parameters:</span></dt>
+<dd><code>votes</code> - set of votes</dd>
+<dd><code>leader</code> - leader id</dd>
+<dd><code>electionEpoch</code> - epoch id</dd>
+</dl>
+</li>
+</ul>
+<a name="getVote--">
+<!-- -->
+</a>
+<ul class="blockList">
+<li class="blockList">
+<h4>getVote</h4>
+<pre>public&nbsp;<a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a>&nbsp;getVote()</pre>
+</li>
+</ul>
+<a name="lookForLeader--">
+<!-- -->
+</a>
+<ul class="blockListLast">
+<li class="blockList">
+<h4>lookForLeader</h4>
+<pre>public&nbsp;<a href="../../../../../org/apache/zookeeper/server/quorum/Vote.html" title="class in org.apache.zookeeper.server.quorum">Vote</a>&nbsp;lookForLeader()
+ throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre>
+<div class="block">Starts a new round of leader election. Whenever our QuorumPeer
+ changes its state to LOOKING, this method is invoked, and it
+ sends notifications to all other peers.</div>
+<dl>
+<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
+<dd><code><a href="../../../../../org/apache/zookeeper/server/quorum/Election.html#lookForLeader--">lookForLeader</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/zookeeper/server/quorum/Election.html" title="interface in org.apache.zookeeper.server.quorum">Election</a></code></dd>
+<dt><span class="throwsLabel">Throws:</span></dt>
+<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code></dd>
+</dl>
+</li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
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