org.apache.hadoop.util

类 ProcessTree

java.lang.Object

org.apache.hadoop.util.ProcessTree

直接已知子类:

ProcfsBasedProcessTree

public class ProcessTree
extends Object

Process tree related operations

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ProcessTree.Signal The constants for the signals.

字段概要

字段

限定符和类型	字段和说明
static boolean	isSetsidAvailable

构造器概要

构造器

构造器和说明
ProcessTree()

方法概要

方法

限定符和类型	方法和说明
static boolean	isAlive(String pid) Is the process with PID pid still alive?
static boolean	isProcessGroupAlive(String pgrpId) Is the process group with still alive?
static void	killProcess(String pid, ProcessTree.Signal signal) Sends signal to process, forcefully terminating the process.
static void	killProcessGroup(String pgrpId, ProcessTree.Signal signal) Sends signal to all process belonging to same process group, forcefully terminating the process group.

从类继承的方法 java.lang.Object

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

字段详细资料

isSetsidAvailable

public static final boolean isSetsidAvailable

构造器详细资料

ProcessTree

public ProcessTree()

方法详细资料

killProcess

public static void killProcess(String pid,
               ProcessTree.Signal signal)

Sends signal to process, forcefully terminating the process.

参数:

pid - process id

signal - the signal number to send

killProcessGroup

public static void killProcessGroup(String pgrpId,
                    ProcessTree.Signal signal)

Sends signal to all process belonging to same process group, forcefully terminating the process group.

参数:

pgrpId - process group id

signal - the signal number to send

isAlive

public static boolean isAlive(String pid)

Is the process with PID pid still alive? This method assumes that isAlive is called on a pid that was alive not too long ago, and hence assumes no chance of pid-wrapping-around.

参数:

pid - pid of the process to check.

返回:

true if process is alive.

isProcessGroupAlive

public static boolean isProcessGroupAlive(String pgrpId)

Is the process group with still alive? This method assumes that isAlive is called on a pid that was alive not too long ago, and hence assumes no chance of pid-wrapping-around.

参数:

pgrpId - process group id

返回:

true if any of process in group is alive.