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apache / hadoop-site / 952d547359cafef280f0a0324055741b2ed55be1 / . / content / docs / r3.3.1 / hadoop-project-dist / hadoop-hdfs-client / build / source / hadoop-hdfs-project / hadoop-hdfs-client / target / api / org / apache / hadoop / hdfs / server / namenode / ha / IPFailoverProxyProvider.html
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<div class="subTitle">org.apache.hadoop.hdfs.server.namenode.ha</div>
<h2 title="Class IPFailoverProxyProvider" class="title">Class IPFailoverProxyProvider&lt;T&gt;</h2>
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<li><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">org.apache.hadoop.hdfs.server.namenode.ha.AbstractNNFailoverProxyProvider</a>&lt;T&gt;</li>
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<li>org.apache.hadoop.hdfs.server.namenode.ha.IPFailoverProxyProvider&lt;T&gt;</li>
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<pre>public class <span class="typeNameLabel">IPFailoverProxyProvider&lt;T&gt;</span>
extends <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider</a>&lt;T&gt;</pre>
<div class="block">A NNFailoverProxyProvider implementation which works on IP failover setup.
Only one proxy is used to connect to both servers and switching between
the servers is done by the environment/infrastructure, which guarantees
clients can consistently reach only one node at a time.
Clients with a live connection will likely get connection reset after an
IP failover. This case will be handled by the
FailoverOnNetworkExceptionRetry retry policy. I.e. if the call is
not idempotent, it won't get retried.
A connection reset while setting up a connection (i.e. before sending a
request) will be handled in ipc client.
The namenode URI must contain a resolvable host name.</div>
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<code><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="type parameter in AbstractNNFailoverProxyProvider.NNProxyInfo">T</a>&gt;</code></li>
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<h3>Nested classes/interfaces inherited from interface&nbsp;org.apache.hadoop.io.retry.FailoverProxyProvider</h3>
<code>org.apache.hadoop.io.retry.FailoverProxyProvider.ProxyInfo&lt;T&gt;</code></li>
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<code><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#conf">conf</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#factory">factory</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#fallbackToSimpleAuth">fallbackToSimpleAuth</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#LOG">LOG</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#ugi">ugi</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#xface">xface</a></code></li>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html#IPFailoverProxyProvider-org.apache.hadoop.conf.Configuration-java.net.URI-java.lang.Class-org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory-">IPFailoverProxyProvider</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;uri,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="type parameter in IPFailoverProxyProvider">T</a>&gt;&nbsp;xface,
org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="type parameter in IPFailoverProxyProvider">T</a>&gt;&nbsp;factory)</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/hdfs/server/namenode/ha/IPFailoverProxyProvider.html#close--">close</a></span>()</code>
<div class="block">Close the proxy,</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="type parameter in IPFailoverProxyProvider">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html#getProxy--">getProxy</a></span>()</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/hdfs/server/namenode/ha/IPFailoverProxyProvider.html#performFailover-T-">performFailover</a></span>(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="type parameter in IPFailoverProxyProvider">T</a>&nbsp;currentProxy)</code>
<div class="block">Nothing to do for IP failover</div>
</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html#useLogicalURI--">useLogicalURI</a></span>()</code>
<div class="block">Logical URI is not used for IP failover.</div>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.hdfs.server.namenode.ha.<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider</a></h3>
<code><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#createProxyIfNeeded-org.apache.hadoop.hdfs.server.namenode.ha.AbstractNNFailoverProxyProvider.NNProxyInfo-">createProxyIfNeeded</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#getFallbackToSimpleAuth--">getFallbackToSimpleAuth</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#getInterface--">getInterface</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#getProxyAddresses-java.net.URI-java.lang.String-">getProxyAddresses</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#getRandomOrder-org.apache.hadoop.conf.Configuration-java.net.URI-">getRandomOrder</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#setFallbackToSimpleAuth-java.util.concurrent.atomic.AtomicBoolean-">setFallbackToSimpleAuth</a></code></li>
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<h3>Constructor Detail</h3>
<a name="IPFailoverProxyProvider-org.apache.hadoop.conf.Configuration-java.net.URI-java.lang.Class-org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory-">
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<h4>IPFailoverProxyProvider</h4>
<pre>public&nbsp;IPFailoverProxyProvider(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;uri,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="type parameter in IPFailoverProxyProvider">T</a>&gt;&nbsp;xface,
org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="type parameter in IPFailoverProxyProvider">T</a>&gt;&nbsp;factory)</pre>
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<h4>getProxy</h4>
<pre>public&nbsp;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="type parameter in IPFailoverProxyProvider">T</a>&gt;&nbsp;getProxy()</pre>
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<h4>performFailover</h4>
<pre>public&nbsp;void&nbsp;performFailover(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="type parameter in IPFailoverProxyProvider">T</a>&nbsp;currentProxy)</pre>
<div class="block">Nothing to do for IP failover</div>
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<h4>close</h4>
<pre>public&nbsp;void&nbsp;close()
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">Close the proxy,</div>
<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>useLogicalURI</h4>
<pre>public&nbsp;boolean&nbsp;useLogicalURI()</pre>
<div class="block">Logical URI is not used for IP failover.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#useLogicalURI--">useLogicalURI</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="type parameter in IPFailoverProxyProvider">T</a>&gt;</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if logical HA URI is used. false, if not used.</dd>
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