SparkConf (Spark 2.2.3 JavaDoc)

Object
- org.apache.spark.SparkConf

All Implemented Interfaces:

java.io.Serializable, Cloneable, Logging
```
public class SparkConf
extends Object
implements scala.Cloneable, Logging, scala.Serializable
```
Configuration for a Spark application. Used to set various Spark parameters as key-value pairs.
Most of the time, you would create a SparkConf object with new SparkConf(), which will load values from any spark.* Java system properties set in your application as well. In this case, parameters you set directly on the SparkConf object take priority over system properties.
For unit tests, you can also call new SparkConf(false) to skip loading external settings and get the same configuration no matter what the system properties are.
All setter methods in this class support chaining. For example, you can write new SparkConf().setMaster("local").setAppName("My app").
param: loadDefaults whether to also load values from Java system properties

See Also:

Serialized Form

Note:

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.

Constructor Summary

Constructors
Constructor and Description

SparkConf()
Create a SparkConf that loads defaults from system properties and the classpath

SparkConf(boolean loadDefaults)

Constructors
Constructor and Description
`SparkConf()` Create a SparkConf that loads defaults from system properties and the classpath
`SparkConf(boolean loadDefaults)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`SparkConf`	`clone()` Copy this object
`boolean`	`contains(String key)` Does the configuration contain a given parameter?
`String`	`get(String key)` Get a parameter; throws a NoSuchElementException if it's not set
`String`	`get(String key, String defaultValue)` Get a parameter, falling back to a default if not set
`scala.Tuple2<String,String>[]`	`getAll()` Get all parameters as a list of pairs
`scala.Tuple2<String,String>[]`	`getAllWithPrefix(String prefix)` Get all parameters that start with `prefix`
`String`	`getAppId()` Returns the Spark application id, valid in the Driver after TaskScheduler registration and from the start in the Executor.
`scala.collection.immutable.Map<Object,String>`	`getAvroSchema()` Gets all the avro schemas in the configuration used in the generic Avro record serializer
`boolean`	`getBoolean(String key, boolean defaultValue)` Get a parameter as a boolean, falling back to a default if not set
`static scala.Option<String>`	`getDeprecatedConfig(String key, SparkConf conf)` Looks for available deprecated keys for the given config option, and return the first value available.
`double`	`getDouble(String key, double defaultValue)` Get a parameter as a double, falling back to a default if not set
`scala.collection.Seq<scala.Tuple2<String,String>>`	`getExecutorEnv()` Get all executor environment variables set on this SparkConf
`int`	`getInt(String key, int defaultValue)` Get a parameter as an integer, falling back to a default if not set
`long`	`getLong(String key, long defaultValue)` Get a parameter as a long, falling back to a default if not set
`scala.Option<String>`	`getOption(String key)` Get a parameter as an Option
`long`	`getSizeAsBytes(String key)` Get a size parameter as bytes; throws a NoSuchElementException if it's not set.
`long`	`getSizeAsBytes(String key, long defaultValue)` Get a size parameter as bytes, falling back to a default if not set.
`long`	`getSizeAsBytes(String key, String defaultValue)` Get a size parameter as bytes, falling back to a default if not set.
`long`	`getSizeAsGb(String key)` Get a size parameter as Gibibytes; throws a NoSuchElementException if it's not set.
`long`	`getSizeAsGb(String key, String defaultValue)` Get a size parameter as Gibibytes, falling back to a default if not set.
`long`	`getSizeAsKb(String key)` Get a size parameter as Kibibytes; throws a NoSuchElementException if it's not set.
`long`	`getSizeAsKb(String key, String defaultValue)` Get a size parameter as Kibibytes, falling back to a default if not set.
`long`	`getSizeAsMb(String key)` Get a size parameter as Mebibytes; throws a NoSuchElementException if it's not set.
`long`	`getSizeAsMb(String key, String defaultValue)` Get a size parameter as Mebibytes, falling back to a default if not set.
`long`	`getTimeAsMs(String key)` Get a time parameter as milliseconds; throws a NoSuchElementException if it's not set.
`long`	`getTimeAsMs(String key, String defaultValue)` Get a time parameter as milliseconds, falling back to a default if not set.
`long`	`getTimeAsSeconds(String key)` Get a time parameter as seconds; throws a NoSuchElementException if it's not set.
`long`	`getTimeAsSeconds(String key, String defaultValue)` Get a time parameter as seconds, falling back to a default if not set.
`static boolean`	`isExecutorStartupConf(String name)` Return whether the given config should be passed to an executor on start-up.
`static boolean`	`isSparkPortConf(String name)` Return true if the given config matches either `spark..port` or `spark.port.`.
`static void`	`logDeprecationWarning(String key)` Logs a warning message if the given config key is deprecated.
`SparkConf`	`registerAvroSchemas(scala.collection.Seq<org.apache.avro.Schema> schemas)` Use Kryo serialization and register the given set of Avro schemas so that the generic record serializer can decrease network IO
`SparkConf`	`registerKryoClasses(Class<?>[] classes)` Use Kryo serialization and register the given set of classes with Kryo.
`SparkConf`	`remove(String key)` Remove a parameter from the configuration
`SparkConf`	`set(String key, String value)` Set a configuration variable.
`SparkConf`	`setAll(scala.collection.Traversable<scala.Tuple2<String,String>> settings)` Set multiple parameters together
`SparkConf`	`setAppName(String name)` Set a name for your application.
`SparkConf`	`setExecutorEnv(scala.collection.Seq<scala.Tuple2<String,String>> variables)` Set multiple environment variables to be used when launching executors.
`SparkConf`	`setExecutorEnv(String variable, String value)` Set an environment variable to be used when launching executors for this application.
`SparkConf`	`setExecutorEnv(scala.Tuple2<String,String>[] variables)` Set multiple environment variables to be used when launching executors.
`SparkConf`	`setIfMissing(String key, String value)` Set a parameter if it isn't already configured
`SparkConf`	`setJars(scala.collection.Seq<String> jars)` Set JAR files to distribute to the cluster.
`SparkConf`	`setJars(String[] jars)` Set JAR files to distribute to the cluster.
`SparkConf`	`setMaster(String master)` The master URL to connect to, such as "local" to run locally with one thread, "local[4]" to run locally with 4 cores, or "spark://master:7077" to run on a Spark standalone cluster.
`SparkConf`	`setSparkHome(String home)` Set the location where Spark is installed on worker nodes.
`String`	`toDebugString()` Return a string listing all keys and values, one per line.

Methods inherited from class Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.spark.internal.Logging
initializeLogging, initializeLogIfNecessary, isTraceEnabled, log_, log, logDebug, logDebug, logError, logError, logInfo, logInfo, logName, logTrace, logTrace, logWarning, logWarning

- Constructor Detail
  - SparkConf
```
public SparkConf(boolean loadDefaults)
```
  - SparkConf
```
public SparkConf()
```
    Create a SparkConf that loads defaults from system properties and the classpath
- Method Detail
  - isExecutorStartupConf
```
public static boolean isExecutorStartupConf(String name)
```
    Return whether the given config should be passed to an executor on start-up.
    Certain authentication configs are required from the executor when it connects to the scheduler, while the rest of the spark configs can be inherited from the driver later.
    
    Parameters:
    
    name - (undocumented)
    
    Returns:
    
    (undocumented)
  - isSparkPortConf
```
public static boolean isSparkPortConf(String name)
```
    Return true if the given config matches either spark.*.port or spark.port.*.
    
    Parameters:
    
    name - (undocumented)
    
    Returns:
    
    (undocumented)
  - getDeprecatedConfig
```
public static scala.Option<String> getDeprecatedConfig(String key,
                                                       SparkConf conf)
```
    Looks for available deprecated keys for the given config option, and return the first value available.
    
    Parameters:
    
    key - (undocumented)
    
    conf - (undocumented)
    
    Returns:
    
    (undocumented)
  - logDeprecationWarning
```
public static void logDeprecationWarning(String key)
```
    Logs a warning message if the given config key is deprecated.
    
    Parameters:
    
    key - (undocumented)
  - set
```
public SparkConf set(String key,
                     String value)
```
    Set a configuration variable.
  - setMaster
```
public SparkConf setMaster(String master)
```
    The master URL to connect to, such as "local" to run locally with one thread, "local[4]" to run locally with 4 cores, or "spark://master:7077" to run on a Spark standalone cluster.
    
    Parameters:
    
    master - (undocumented)
    
    Returns:
    
    (undocumented)
  - setAppName
```
public SparkConf setAppName(String name)
```
    Set a name for your application. Shown in the Spark web UI.
  - setJars
```
public SparkConf setJars(scala.collection.Seq<String> jars)
```
    Set JAR files to distribute to the cluster.
  - setJars
```
public SparkConf setJars(String[] jars)
```
    Set JAR files to distribute to the cluster. (Java-friendly version.)
  - setExecutorEnv
```
public SparkConf setExecutorEnv(String variable,
                                String value)
```
    Set an environment variable to be used when launching executors for this application. These variables are stored as properties of the form spark.executorEnv.VAR_NAME (for example spark.executorEnv.PATH) but this method makes them easier to set.
    
    Parameters:
    
    variable - (undocumented)
    
    value - (undocumented)
    
    Returns:
    
    (undocumented)
  - setExecutorEnv
```
public SparkConf setExecutorEnv(scala.collection.Seq<scala.Tuple2<String,String>> variables)
```
    Set multiple environment variables to be used when launching executors. These variables are stored as properties of the form spark.executorEnv.VAR_NAME (for example spark.executorEnv.PATH) but this method makes them easier to set.
    
    Parameters:
    
    variables - (undocumented)
    
    Returns:
    
    (undocumented)
  - setExecutorEnv
```
public SparkConf setExecutorEnv(scala.Tuple2<String,String>[] variables)
```
    Set multiple environment variables to be used when launching executors. (Java-friendly version.)
    
    Parameters:
    
    variables - (undocumented)
    
    Returns:
    
    (undocumented)
  - setSparkHome
```
public SparkConf setSparkHome(String home)
```
    Set the location where Spark is installed on worker nodes.
    
    Parameters:
    
    home - (undocumented)
    
    Returns:
    
    (undocumented)
  - setAll
```
public SparkConf setAll(scala.collection.Traversable<scala.Tuple2<String,String>> settings)
```
    Set multiple parameters together
  - setIfMissing
```
public SparkConf setIfMissing(String key,
                              String value)
```
    Set a parameter if it isn't already configured
  - registerKryoClasses
```
public SparkConf registerKryoClasses(Class<?>[] classes)
```
    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.
    
    Parameters:
    
    classes - (undocumented)
    
    Returns:
    
    (undocumented)
  - registerAvroSchemas
```
public SparkConf registerAvroSchemas(scala.collection.Seq<org.apache.avro.Schema> schemas)
```
    Use Kryo serialization and register the given set of Avro schemas so that the generic record serializer can decrease network IO
    
    Parameters:
    
    schemas - (undocumented)
    
    Returns:
    
    (undocumented)
  - getAvroSchema
```
public scala.collection.immutable.Map<Object,String> getAvroSchema()
```
    Gets all the avro schemas in the configuration used in the generic Avro record serializer
  - remove
```
public SparkConf remove(String key)
```
    Remove a parameter from the configuration
  - get
```
public String get(String key)
```
    Get a parameter; throws a NoSuchElementException if it's not set
  - get
```
public String get(String key,
                  String defaultValue)
```
    Get a parameter, falling back to a default if not set
  - getTimeAsSeconds
```
public long getTimeAsSeconds(String key)
```
    Get a time parameter as seconds; throws a NoSuchElementException if it's not set. If no suffix is provided then seconds are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    Returns:
    
    (undocumented)
    
    Throws:
    
    java.util.NoSuchElementException - If the time parameter is not set
  - getTimeAsSeconds
```
public long getTimeAsSeconds(String key,
                             String defaultValue)
```
    Get a time parameter as seconds, falling back to a default if not set. If no suffix is provided then seconds are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    defaultValue - (undocumented)
    
    Returns:
    
    (undocumented)
  - getTimeAsMs
```
public long getTimeAsMs(String key)
```
    Get a time parameter as milliseconds; throws a NoSuchElementException if it's not set. If no suffix is provided then milliseconds are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    Returns:
    
    (undocumented)
    
    Throws:
    
    java.util.NoSuchElementException - If the time parameter is not set
  - getTimeAsMs
```
public long getTimeAsMs(String key,
                        String defaultValue)
```
    Get a time parameter as milliseconds, falling back to a default if not set. If no suffix is provided then milliseconds are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    defaultValue - (undocumented)
    
    Returns:
    
    (undocumented)
  - getSizeAsBytes
```
public long getSizeAsBytes(String key)
```
    Get a size parameter as bytes; throws a NoSuchElementException if it's not set. If no suffix is provided then bytes are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    Returns:
    
    (undocumented)
    
    Throws:
    
    java.util.NoSuchElementException - If the size parameter is not set
  - getSizeAsBytes
```
public long getSizeAsBytes(String key,
                           String defaultValue)
```
    Get a size parameter as bytes, falling back to a default if not set. If no suffix is provided then bytes are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    defaultValue - (undocumented)
    
    Returns:
    
    (undocumented)
  - getSizeAsBytes
```
public long getSizeAsBytes(String key,
                           long defaultValue)
```
    Get a size parameter as bytes, falling back to a default if not set.
    
    Parameters:
    
    key - (undocumented)
    
    defaultValue - (undocumented)
    
    Returns:
    
    (undocumented)
  - getSizeAsKb
```
public long getSizeAsKb(String key)
```
    Get a size parameter as Kibibytes; throws a NoSuchElementException if it's not set. If no suffix is provided then Kibibytes are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    Returns:
    
    (undocumented)
    
    Throws:
    
    java.util.NoSuchElementException - If the size parameter is not set
  - getSizeAsKb
```
public long getSizeAsKb(String key,
                        String defaultValue)
```
    Get a size parameter as Kibibytes, falling back to a default if not set. If no suffix is provided then Kibibytes are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    defaultValue - (undocumented)
    
    Returns:
    
    (undocumented)
  - getSizeAsMb
```
public long getSizeAsMb(String key)
```
    Get a size parameter as Mebibytes; throws a NoSuchElementException if it's not set. If no suffix is provided then Mebibytes are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    Returns:
    
    (undocumented)
    
    Throws:
    
    java.util.NoSuchElementException - If the size parameter is not set
  - getSizeAsMb
```
public long getSizeAsMb(String key,
                        String defaultValue)
```
    Get a size parameter as Mebibytes, falling back to a default if not set. If no suffix is provided then Mebibytes are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    defaultValue - (undocumented)
    
    Returns:
    
    (undocumented)
  - getSizeAsGb
```
public long getSizeAsGb(String key)
```
    Get a size parameter as Gibibytes; throws a NoSuchElementException if it's not set. If no suffix is provided then Gibibytes are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    Returns:
    
    (undocumented)
    
    Throws:
    
    java.util.NoSuchElementException - If the size parameter is not set
  - getSizeAsGb
```
public long getSizeAsGb(String key,
                        String defaultValue)
```
    Get a size parameter as Gibibytes, falling back to a default if not set. If no suffix is provided then Gibibytes are assumed.
    
    Parameters:
    
    key - (undocumented)
    
    defaultValue - (undocumented)
    
    Returns:
    
    (undocumented)
  - getOption
```
public scala.Option<String> getOption(String key)
```
    Get a parameter as an Option
  - getAll
```
public scala.Tuple2<String,String>[] getAll()
```
    Get all parameters as a list of pairs
  - getAllWithPrefix
```
public scala.Tuple2<String,String>[] getAllWithPrefix(String prefix)
```
    Get all parameters that start with prefix
    
    Parameters:
    
    prefix - (undocumented)
    
    Returns:
    
    (undocumented)
  - getInt
```
public int getInt(String key,
                  int defaultValue)
```
    Get a parameter as an integer, falling back to a default if not set
  - getLong
```
public long getLong(String key,
                    long defaultValue)
```
    Get a parameter as a long, falling back to a default if not set
  - getDouble
```
public double getDouble(String key,
                        double defaultValue)
```
    Get a parameter as a double, falling back to a default if not set
  - getBoolean
```
public boolean getBoolean(String key,
                          boolean defaultValue)
```
    Get a parameter as a boolean, falling back to a default if not set
  - getExecutorEnv
```
public scala.collection.Seq<scala.Tuple2<String,String>> getExecutorEnv()
```
    Get all executor environment variables set on this SparkConf
  - getAppId
```
public String getAppId()
```
    Returns the Spark application id, valid in the Driver after TaskScheduler registration and from the start in the Executor.
    
    Returns:
    
    (undocumented)
  - contains
```
public boolean contains(String key)
```
    Does the configuration contain a given parameter?
  - clone
```
public SparkConf clone()
```
    Copy this object
    
    Overrides:
    
    clone in class Object
  - toDebugString
```
public String toDebugString()
```
    Return a string listing all keys and values, one per line. This is useful to print the configuration out for debugging.
    
    Returns:
    
    (undocumented)

Class SparkConf

Constructor Summary

Method Summary

Methods inherited from class Object

Methods inherited from interface org.apache.spark.internal.Logging

Constructor Detail

SparkConf

SparkConf

Method Detail

isExecutorStartupConf

isSparkPortConf

getDeprecatedConfig

logDeprecationWarning

set

setMaster

setAppName

setJars

setJars

setExecutorEnv

setExecutorEnv

setExecutorEnv

setSparkHome

setAll

setIfMissing

registerKryoClasses

registerAvroSchemas

getAvroSchema

remove

get

get

getTimeAsSeconds

getTimeAsSeconds

getTimeAsMs

getTimeAsMs

getSizeAsBytes

getSizeAsBytes

getSizeAsBytes

getSizeAsKb

getSizeAsKb

getSizeAsMb

getSizeAsMb

getSizeAsGb

getSizeAsGb

getOption

getAll

getAllWithPrefix

getInt

getLong

getDouble

getBoolean

getExecutorEnv

getAppId

contains

clone

toDebugString