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<h2 title="Class SparkConf" class="title">Class SparkConf</h2>
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<li>java.lang.Object</li>
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<pre>public class <span class="strong">SparkConf</span>
extends java.lang.Object
implements scala.Cloneable, <a href="../../../org/apache/spark/Logging.html" title="interface in org.apache.spark">Logging</a></pre>
<div class="block">Configuration for a Spark application. Used to set various Spark parameters as key-value pairs.
<p>
Most of the time, you would create a SparkConf object with <code>new SparkConf()</code>, which will load
values from any <code>spark.*</code> Java system properties set in your application as well. In this case,
parameters you set directly on the <code>SparkConf</code> object take priority over system properties.
<p>
For unit tests, you can also call <code>new SparkConf(false)</code> to skip loading external settings and
get the same configuration no matter what the system properties are.
<p>
All setter methods in this class support chaining. For example, you can write
<code>new SparkConf().setMaster("local").setAppName("My app")</code>.
<p>
Note that once a SparkConf object is passed to Spark, it is cloned and can no longer be modified
by the user. Spark does not support modifying the configuration at runtime.
<p>
param: loadDefaults whether to also load values from Java system properties</div>
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<td class="colOne"><code><strong><a href="../../../org/apache/spark/SparkConf.html#SparkConf()">SparkConf</a></strong>()</code>
<div class="block">Create a SparkConf that loads defaults from system properties and the classpath</div>
</td>
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<td class="colOne"><code><strong><a href="../../../org/apache/spark/SparkConf.html#SparkConf(boolean)">SparkConf</a></strong>(boolean loadDefaults)</code> </td>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code><a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a></code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#clone()">clone</a></strong>()</code>
<div class="block">Copy this object</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#contains(java.lang.String)">contains</a></strong>(java.lang.String key)</code>
<div class="block">Does the configuration contain a given parameter?</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#get(java.lang.String)">get</a></strong>(java.lang.String key)</code>
<div class="block">Get a parameter; throws a NoSuchElementException if it's not set</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#get(java.lang.String, java.lang.String)">get</a></strong>(java.lang.String key,
java.lang.String defaultValue)</code>
<div class="block">Get a parameter, falling back to a default if not set</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>scala.collection.Seq<scala.Tuple2<java.lang.String,java.lang.String>></code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getAkkaConf()">getAkkaConf</a></strong>()</code>
<div class="block">Get all akka conf variables set on this SparkConf</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>scala.Tuple2<java.lang.String,java.lang.String>[]</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getAll()">getAll</a></strong>()</code>
<div class="block">Get all parameters as a list of pairs</div>
</td>
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<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getAppId()">getAppId</a></strong>()</code>
<div class="block">Returns the Spark application id, valid in the Driver after TaskScheduler registration and
from the start in the Executor.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>scala.collection.immutable.Map<java.lang.Object,java.lang.String></code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getAvroSchema()">getAvroSchema</a></strong>()</code>
<div class="block">Gets all the avro schemas in the configuration used in the generic Avro record serializer</div>
</td>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getBoolean(java.lang.String, boolean)">getBoolean</a></strong>(java.lang.String key,
boolean defaultValue)</code>
<div class="block">Get a parameter as a boolean, falling back to a default if not set</div>
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<td class="colFirst"><code>static scala.Option<java.lang.String></code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getDeprecatedConfig(java.lang.String, org.apache.spark.SparkConf)">getDeprecatedConfig</a></strong>(java.lang.String key,
<a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a> conf)</code>
<div class="block">Looks for available deprecated keys for the given config option, and return the first
value available.</div>
</td>
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<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getDouble(java.lang.String, double)">getDouble</a></strong>(java.lang.String key,
double defaultValue)</code>
<div class="block">Get a parameter as a double, falling back to a default if not set</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>scala.collection.Seq<scala.Tuple2<java.lang.String,java.lang.String>></code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getExecutorEnv()">getExecutorEnv</a></strong>()</code>
<div class="block">Get all executor environment variables set on this SparkConf</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getInt(java.lang.String, int)">getInt</a></strong>(java.lang.String key,
int defaultValue)</code>
<div class="block">Get a parameter as an integer, falling back to a default if not set</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getLong(java.lang.String, long)">getLong</a></strong>(java.lang.String key,
long defaultValue)</code>
<div class="block">Get a parameter as a long, falling back to a default if not set</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>scala.Option<java.lang.String></code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getOption(java.lang.String)">getOption</a></strong>(java.lang.String key)</code>
<div class="block">Get a parameter as an Option</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getSizeAsBytes(java.lang.String)">getSizeAsBytes</a></strong>(java.lang.String key)</code>
<div class="block">Get a size parameter as bytes; throws a NoSuchElementException if it's not set.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getSizeAsBytes(java.lang.String, long)">getSizeAsBytes</a></strong>(java.lang.String key,
long defaultValue)</code>
<div class="block">Get a size parameter as bytes, falling back to a default if not set.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><strong><a href="../../../org/apache/spark/SparkConf.html#getSizeAsBytes(java.lang.String, java.lang.String)">getSizeAsBytes</a></strong>(java.lang.String key,
java.lang.String defaultValue)</code>
<div class="block">Get a size parameter as bytes, falling back to a default if not set.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>long</code></td>
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<td class="colFirst"><code>long</code></td>
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<td class="colFirst"><code>long</code></td>
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<td class="colFirst"><code>static boolean</code></td>
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<td class="colFirst"><code><a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a></code></td>
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<td class="colFirst"><code><a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a></code></td>
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<td class="colFirst"><code><a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a></code></td>
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<td class="colFirst"><code>java.lang.String</code></td>
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<pre>public SparkConf()</pre>
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<pre>public static boolean isAkkaConf(java.lang.String name)</pre>
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<p>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>name</code> - (undocumented)</dd>
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<div class="block">Looks for available deprecated keys for the given config option, and return the first
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<div class="block">Set an environment variable to be used when launching executors for this application.
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<pre>public <a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a> setSparkHome(java.lang.String home)</pre>
<div class="block">Set the location where Spark is installed on worker nodes.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>home</code> - (undocumented)</dd>
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<pre>public <a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a> setAll(scala.collection.Traversable<scala.Tuple2<java.lang.String,java.lang.String>> settings)</pre>
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<pre>public <a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a> setIfMissing(java.lang.String key,
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<pre>public <a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a> registerKryoClasses(java.lang.Class<?>[] classes)</pre>
<div class="block">Use Kryo serialization and register the given set of classes with Kryo.
If called multiple times, this will append the classes from all calls together.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>classes</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>public <a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a> registerAvroSchemas(scala.collection.Seq<org.apache.avro.Schema> schemas)</pre>
<div class="block">Use Kryo serialization and register the given set of Avro schemas so that the generic
record serializer can decrease network IO</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>schemas</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>public scala.collection.immutable.Map<java.lang.Object,java.lang.String> getAvroSchema()</pre>
<div class="block">Gets all the avro schemas in the configuration used in the generic Avro record serializer</div>
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<h4>remove</h4>
<pre>public <a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a> remove(java.lang.String key)</pre>
<div class="block">Remove a parameter from the configuration</div>
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<h4>get</h4>
<pre>public java.lang.String get(java.lang.String key)</pre>
<div class="block">Get a parameter; throws a NoSuchElementException if it's not set</div>
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<pre>public java.lang.String get(java.lang.String key,
java.lang.String defaultValue)</pre>
<div class="block">Get a parameter, falling back to a default if not set</div>
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<pre>public long getTimeAsSeconds(java.lang.String key)</pre>
<div class="block">Get a time parameter as seconds; throws a NoSuchElementException if it's not set. If no
suffix is provided then seconds are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>NoSuchElementException</code></dd></dl>
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<pre>public long getTimeAsSeconds(java.lang.String key,
java.lang.String defaultValue)</pre>
<div class="block">Get a time parameter as seconds, falling back to a default if not set. If no
suffix is provided then seconds are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd><dd><code>defaultValue</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>public long getTimeAsMs(java.lang.String key)</pre>
<div class="block">Get a time parameter as milliseconds; throws a NoSuchElementException if it's not set. If no
suffix is provided then milliseconds are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>NoSuchElementException</code></dd></dl>
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<pre>public long getTimeAsMs(java.lang.String key,
java.lang.String defaultValue)</pre>
<div class="block">Get a time parameter as milliseconds, falling back to a default if not set. If no
suffix is provided then milliseconds are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd><dd><code>defaultValue</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>public long getSizeAsBytes(java.lang.String key)</pre>
<div class="block">Get a size parameter as bytes; throws a NoSuchElementException if it's not set. If no
suffix is provided then bytes are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>NoSuchElementException</code></dd></dl>
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<pre>public long getSizeAsBytes(java.lang.String key,
java.lang.String defaultValue)</pre>
<div class="block">Get a size parameter as bytes, falling back to a default if not set. If no
suffix is provided then bytes are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd><dd><code>defaultValue</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>public long getSizeAsBytes(java.lang.String key,
long defaultValue)</pre>
<div class="block">Get a size parameter as bytes, falling back to a default if not set.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd><dd><code>defaultValue</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>public long getSizeAsKb(java.lang.String key)</pre>
<div class="block">Get a size parameter as Kibibytes; throws a NoSuchElementException if it's not set. If no
suffix is provided then Kibibytes are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>NoSuchElementException</code></dd></dl>
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<pre>public long getSizeAsKb(java.lang.String key,
java.lang.String defaultValue)</pre>
<div class="block">Get a size parameter as Kibibytes, falling back to a default if not set. If no
suffix is provided then Kibibytes are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd><dd><code>defaultValue</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>public long getSizeAsMb(java.lang.String key)</pre>
<div class="block">Get a size parameter as Mebibytes; throws a NoSuchElementException if it's not set. If no
suffix is provided then Mebibytes are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>NoSuchElementException</code></dd></dl>
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<pre>public long getSizeAsMb(java.lang.String key,
java.lang.String defaultValue)</pre>
<div class="block">Get a size parameter as Mebibytes, falling back to a default if not set. If no
suffix is provided then Mebibytes are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd><dd><code>defaultValue</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<pre>public long getSizeAsGb(java.lang.String key)</pre>
<div class="block">Get a size parameter as Gibibytes; throws a NoSuchElementException if it's not set. If no
suffix is provided then Gibibytes are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>NoSuchElementException</code></dd></dl>
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<pre>public long getSizeAsGb(java.lang.String key,
java.lang.String defaultValue)</pre>
<div class="block">Get a size parameter as Gibibytes, falling back to a default if not set. If no
suffix is provided then Gibibytes are assumed.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - (undocumented)</dd><dd><code>defaultValue</code> - (undocumented)</dd>
<dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<h4>getOption</h4>
<pre>public scala.Option<java.lang.String> getOption(java.lang.String key)</pre>
<div class="block">Get a parameter as an Option</div>
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<pre>public scala.Tuple2<java.lang.String,java.lang.String>[] getAll()</pre>
<div class="block">Get all parameters as a list of pairs</div>
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<pre>public int getInt(java.lang.String key,
int defaultValue)</pre>
<div class="block">Get a parameter as an integer, falling back to a default if not set</div>
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<h4>getLong</h4>
<pre>public long getLong(java.lang.String key,
long defaultValue)</pre>
<div class="block">Get a parameter as a long, falling back to a default if not set</div>
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<pre>public double getDouble(java.lang.String key,
double defaultValue)</pre>
<div class="block">Get a parameter as a double, falling back to a default if not set</div>
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<h4>getBoolean</h4>
<pre>public boolean getBoolean(java.lang.String key,
boolean defaultValue)</pre>
<div class="block">Get a parameter as a boolean, falling back to a default if not set</div>
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<a name="getExecutorEnv()">
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<h4>getExecutorEnv</h4>
<pre>public scala.collection.Seq<scala.Tuple2<java.lang.String,java.lang.String>> getExecutorEnv()</pre>
<div class="block">Get all executor environment variables set on this SparkConf</div>
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<a name="getAkkaConf()">
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<h4>getAkkaConf</h4>
<pre>public scala.collection.Seq<scala.Tuple2<java.lang.String,java.lang.String>> getAkkaConf()</pre>
<div class="block">Get all akka conf variables set on this SparkConf</div>
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<h4>getAppId</h4>
<pre>public java.lang.String getAppId()</pre>
<div class="block">Returns the Spark application id, valid in the Driver after TaskScheduler registration and
from the start in the Executor.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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<h4>contains</h4>
<pre>public boolean contains(java.lang.String key)</pre>
<div class="block">Does the configuration contain a given parameter?</div>
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<a name="clone()">
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<h4>clone</h4>
<pre>public <a href="../../../org/apache/spark/SparkConf.html" title="class in org.apache.spark">SparkConf</a> clone()</pre>
<div class="block">Copy this object</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code>clone</code> in class <code>java.lang.Object</code></dd>
</dl>
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<h4>toDebugString</h4>
<pre>public java.lang.String toDebugString()</pre>
<div class="block">Return a string listing all keys and values, one per line. This is useful to print the
configuration out for debugging.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>(undocumented)</dd></dl>
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