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java.lang.Objectorg.apache.hadoop.util.ProcessTree
public class ProcessTree
Process tree related operations
| Field Summary | |
|---|---|
static long |
DEFAULT_SLEEPTIME_BEFORE_SIGKILL
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static boolean |
isSetsidAvailable
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| Constructor Summary | |
|---|---|
ProcessTree()
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| Method Summary | |
|---|---|
static void |
destroy(String pid,
long sleeptimeBeforeSigkill,
boolean isProcessGroup,
boolean inBackground)
Destroy the process-tree. |
protected static void |
destroyProcess(String pid,
long sleeptimeBeforeSigkill,
boolean inBackground)
Destroy the process. |
protected static void |
destroyProcessGroup(String pgrpId,
long sleeptimeBeforeSigkill,
boolean inBackground)
Destroy the process group. |
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. |
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. |
static void |
killProcess(String pid)
Sends kill signal to process, forcefully terminating the process. |
static void |
killProcessGroup(String pgrpId)
Sends kill signal to all process belonging to same process group, forcefully terminating the process group. |
static void |
terminateProcess(String pid)
Sends terminate signal to the process, allowing it to gracefully exit. |
static void |
terminateProcessGroup(String pgrpId)
Sends terminate signal to all the process belonging to the passed process group, allowing the group to gracefully exit. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public static final long DEFAULT_SLEEPTIME_BEFORE_SIGKILL
public static final boolean isSetsidAvailable
| Constructor Detail |
|---|
public ProcessTree()
| Method Detail |
|---|
public static void destroy(String pid,
long sleeptimeBeforeSigkill,
boolean isProcessGroup,
boolean inBackground)
pid - process id of the root process of the subtree of processes
to be killedsleeptimeBeforeSigkill - The time to wait before sending SIGKILL
after sending SIGTERMisProcessGroup - pid is a process group leader or notinBackground - Process is to be killed in the back ground with
a separate thread
protected static void destroyProcess(String pid,
long sleeptimeBeforeSigkill,
boolean inBackground)
pid - Process id of to-be-killed-processsleeptimeBeforeSigkill - The time to wait before sending SIGKILL
after sending SIGTERMinBackground - Process is to be killed in the back ground with
a separate thread
protected static void destroyProcessGroup(String pgrpId,
long sleeptimeBeforeSigkill,
boolean inBackground)
pgrpId - Process group id of to-be-killed-processessleeptimeBeforeSigkill - The time to wait before sending SIGKILL
after sending SIGTERMinBackground - Process group is to be killed in the back ground with
a separate threadpublic static void terminateProcess(String pid)
pid - pid of the process to be sent SIGTERMpublic static void terminateProcessGroup(String pgrpId)
pgrpId - process group idpublic static void killProcess(String pid)
pid - process idpublic static void killProcessGroup(String pgrpId)
pgrpId - process group idpublic static boolean isAlive(String pid)
pid - pid of the process to check.
public static boolean isProcessGroupAlive(String pgrpId)
pgrpId - process group id
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