Package org.apache.spark.storage

Class StorageUtils

Object

org.apache.spark.storage.StorageUtils

public class StorageUtils
extends Object

Helper methods for storage-related objects.

Constructor Summary

Constructors

Constructor	Description
StorageUtils()

Method Summary

Modifier and Type	Method	Description
static void	dispose(ByteBuffer buffer)	Attempt to clean up a ByteBuffer if it is direct or memory-mapped.
static int	externalShuffleServicePort(SparkConf conf)	Get the port used by the external shuffle service.
static org.slf4j.Logger	org$apache$spark$internal$Logging$$log_()
static void	org$apache$spark$internal$Logging$$log__$eq(org.slf4j.Logger x$1)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

StorageUtils

public StorageUtils()

Method Details

dispose

public static void dispose(ByteBuffer buffer)

Attempt to clean up a ByteBuffer if it is direct or memory-mapped. This uses an *unsafe* Sun API that will cause errors if one attempts to read from the disposed buffer. However, neither the bytes allocated to direct buffers nor file descriptors opened for memory-mapped buffers put pressure on the garbage collector. Waiting for garbage collection may lead to the depletion of off-heap memory or huge numbers of open files. There's unfortunately no standard API to manually dispose of these kinds of buffers.

Parameters:

buffer - (undocumented)

externalShuffleServicePort

public static int externalShuffleServicePort(SparkConf conf)

Get the port used by the external shuffle service. In Yarn mode, this may be already be set through the Hadoop configuration as the server is launched in the Yarn NM.

Parameters:

conf - (undocumented)

Returns:

(undocumented)

org$apache$spark$internal$Logging$$log_

public static org.slf4j.Logger org$apache$spark$internal$Logging$$log_()

org$apache$spark$internal$Logging$$log__$eq

public static void org$apache$spark$internal$Logging$$log__$eq(org.slf4j.Logger x$1)