Package com.cloudbees.jenkins.support.slowrequest

Class SlowRequestThreadDumpsGenerator

java.lang.Object

java.lang.Thread

com.cloudbees.jenkins.support.slowrequest.SlowRequestThreadDumpsGenerator

All Implemented Interfaces:

Runnable

@Extension
public class SlowRequestThreadDumpsGenerator
extends Thread

Thread in charge of generating the set of thread dumps during a slowRequest scenario.

Author:

Ignacio Roncero

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field	Description
static boolean	DISABLED	Provide a means to disable the slow request thread dump checker.
static final int	FREQUENCY_SEC	Time in seconds that we will wait between the ThreadDump generations (under the same slowRequest check)
protected final FileListCap	logs	Thread dumps generated on slowRequest scenario are stored in $JENKINS_HOME/support/slow-request-threaddumps
static final int	MINIMAL_SLOW_REQUEST_COUNT	The minimal number of SlowRequest found at the same time (in the last 3 seconds) to trigger the ThreadDump generation
static final long	RECURRENCE_PERIOD_MIN	How often (at minimum) we will capture the ThreadDump under a slowRequest scenario.
static final int	SLOW_REQUEST_THREAD_DUMPS_TO_RETAIN	Limit the number of thread dumps to retain on slowRequest scenario
static final int	TOTAL_ITERATIONS	Number of ThreadDump that will be generated during the slowRequest scenario

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor	Description
SlowRequestThreadDumpsGenerator()
SlowRequestThreadDumpsGenerator(long iota)

Method Summary

Modifier and Type	Method	Description
static boolean	checkThreadDumpsTrigger(long iota)
void	run()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, onSpinWait, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Details

RECURRENCE_PERIOD_MIN

public static final long RECURRENCE_PERIOD_MIN

How often (at minimum) we will capture the ThreadDump under a slowRequest scenario. For example, if we set this value to 30 minutes, we will not generate any threadDumps the next 30 minutes after the last generated threadDumps even though we are finding slowRequest during those 30 minutes. This value will help us avoid stressing the system regarding performance.

MINIMAL_SLOW_REQUEST_COUNT

public static final int MINIMAL_SLOW_REQUEST_COUNT

The minimal number of SlowRequest found at the same time (in the last 3 seconds) to trigger the ThreadDump generation

TOTAL_ITERATIONS

public static final int TOTAL_ITERATIONS

Number of ThreadDump that will be generated during the slowRequest scenario

FREQUENCY_SEC

public static final int FREQUENCY_SEC

Time in seconds that we will wait between the ThreadDump generations (under the same slowRequest check)

SLOW_REQUEST_THREAD_DUMPS_TO_RETAIN

public static final int SLOW_REQUEST_THREAD_DUMPS_TO_RETAIN

Limit the number of thread dumps to retain on slowRequest scenario

logs

protected final FileListCap logs

Thread dumps generated on slowRequest scenario are stored in $JENKINS_HOME/support/slow-request-threaddumps

DISABLED

public static boolean DISABLED

Provide a means to disable the slow request thread dump checker.

Constructor Details

SlowRequestThreadDumpsGenerator

public SlowRequestThreadDumpsGenerator(long iota)

SlowRequestThreadDumpsGenerator

public SlowRequestThreadDumpsGenerator()

Method Details

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

checkThreadDumpsTrigger

public static boolean checkThreadDumpsTrigger(long iota)