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<div class="subTitle">org.apache.hadoop.ha.protocolPB</div>
<h2 title="Class ZKFCProtocolClientSideTranslatorPB" class="title">Class ZKFCProtocolClientSideTranslatorPB</h2>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a>, org.apache.hadoop.ha.ZKFCProtocol, org.apache.hadoop.ipc.ProtocolTranslator</dd>
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<pre>public class <span class="typeNameLabel">ZKFCProtocolClientSideTranslatorPB</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 org.apache.hadoop.ha.ZKFCProtocol, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>, org.apache.hadoop.ipc.ProtocolTranslator</pre>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/ha/protocolPB/ZKFCProtocolClientSideTranslatorPB.html#ZKFCProtocolClientSideTranslatorPB-java.net.InetSocketAddress-org.apache.hadoop.conf.Configuration-javax.net.SocketFactory-int-">ZKFCProtocolClientSideTranslatorPB</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/InetSocketAddress.html?is-external=true" title="class or interface in java.net">InetSocketAddress</a>&nbsp;addr,
<a href="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a>&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/javax/net/SocketFactory.html?is-external=true" title="class or interface in javax.net">SocketFactory</a>&nbsp;socketFactory,
int&nbsp;timeout)</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/ha/protocolPB/ZKFCProtocolClientSideTranslatorPB.html#cedeActive-int-">cedeActive</a></span>(int&nbsp;millisToCede)</code>
<div class="block">Request that this service yield from the active node election for the
specified time period.</div>
</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/ha/protocolPB/ZKFCProtocolClientSideTranslatorPB.html#close--">close</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code><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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/ha/protocolPB/ZKFCProtocolClientSideTranslatorPB.html#getUnderlyingProxyObject--">getUnderlyingProxyObject</a></span>()</code>
<div class="block">Return the proxy object underlying this protocol translator.</div>
</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/ha/protocolPB/ZKFCProtocolClientSideTranslatorPB.html#gracefulFailover--">gracefulFailover</a></span>()</code>
<div class="block">Request that this node try to become active through a graceful failover.</div>
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<h4>ZKFCProtocolClientSideTranslatorPB</h4>
<pre>public&nbsp;ZKFCProtocolClientSideTranslatorPB(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/InetSocketAddress.html?is-external=true" title="class or interface in java.net">InetSocketAddress</a>&nbsp;addr,
<a href="../../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</a>&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/javax/net/SocketFactory.html?is-external=true" title="class or interface in javax.net">SocketFactory</a>&nbsp;socketFactory,
int&nbsp;timeout)
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>
<dl>
<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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<h4>cedeActive</h4>
<pre>public&nbsp;void&nbsp;cedeActive(int&nbsp;millisToCede)
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>,
<a href="../../../../../org/apache/hadoop/security/AccessControlException.html" title="class in org.apache.hadoop.security">AccessControlException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code>org.apache.hadoop.ha.ZKFCProtocol</code></span></div>
<div class="block">Request that this service yield from the active node election for the
specified time period.
If the node is not currently active, it simply prevents any attempts
to become active for the specified time period. Otherwise, it first
tries to transition the local service to standby state, and then quits
the election.
If the attempt to transition to standby succeeds, then the ZKFC receiving
this RPC will delete its own breadcrumb node in ZooKeeper. Thus, the
next node to become active will not run any fencing process. Otherwise,
the breadcrumb will be left, such that the next active will fence this
node.
After the specified time period elapses, the node will attempt to re-join
the election, provided that its service is healthy.
If the node has previously been instructed to cede active, and is still
within the specified time period, the later command's time period will
take precedence, resetting the timer.
A call to cedeActive which specifies a 0 or negative time period will
allow the target node to immediately rejoin the election, so long as
it is healthy.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>cedeActive</code>&nbsp;in interface&nbsp;<code>org.apache.hadoop.ha.ZKFCProtocol</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>millisToCede</code> - period for which the node should not attempt to
become active</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> - if the operation fails</dd>
<dd><code><a href="../../../../../org/apache/hadoop/security/AccessControlException.html" title="class in org.apache.hadoop.security">AccessControlException</a></code> - if the operation is disallowed</dd>
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<h4>gracefulFailover</h4>
<pre>public&nbsp;void&nbsp;gracefulFailover()
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>,
<a href="../../../../../org/apache/hadoop/security/AccessControlException.html" title="class in org.apache.hadoop.security">AccessControlException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code>org.apache.hadoop.ha.ZKFCProtocol</code></span></div>
<div class="block">Request that this node try to become active through a graceful failover.
If the node is already active, this is a no-op and simply returns success
without taking any further action.
If the node is not healthy, it will throw an exception indicating that it
is not able to become active.
If the node is healthy and not active, it will try to initiate a graceful
failover to become active, returning only when it has successfully become
active. See <code>ZKFailoverController.gracefulFailoverToYou()</code> for the
implementation details.
If the node fails to successfully coordinate the failover, throws an
exception indicating the reason for failure.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>gracefulFailover</code>&nbsp;in interface&nbsp;<code>org.apache.hadoop.ha.ZKFCProtocol</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> - if graceful failover fails</dd>
<dd><code><a href="../../../../../org/apache/hadoop/security/AccessControlException.html" title="class in org.apache.hadoop.security">AccessControlException</a></code> - if the operation is disallowed</dd>
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<h4>close</h4>
<pre>public&nbsp;void&nbsp;close()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true#close--" title="class or interface in java.io">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd>
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<pre>public&nbsp;<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>&nbsp;getUnderlyingProxyObject()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code>org.apache.hadoop.ipc.ProtocolTranslator</code></span></div>
<div class="block">Return the proxy object underlying this protocol translator.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getUnderlyingProxyObject</code>&nbsp;in interface&nbsp;<code>org.apache.hadoop.ipc.ProtocolTranslator</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the proxy object underlying this protocol translator.</dd>
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