com.sinacloud.scs.http

类 IdleConnectionReaper

java.lang.Object

java.lang.Thread

com.sinacloud.scs.http.IdleConnectionReaper

所有已实现的接口:

Runnable

public final class IdleConnectionReaper
extends Thread

Daemon thread to periodically check connection pools for idle connections.

Connections sitting around idle in the HTTP connection pool for too long will eventually be terminated by the AWS end of the connection, and will go into CLOSE_WAIT. If this happens, sockets will sit around in CLOSE_WAIT, still using resources on the client side to manage that socket. Many sockets stuck in CLOSE_WAIT can prevent the OS from creating new connections.

This class closes idle connections before they can move into the CLOSE_WAIT state.

This thread is important because by default, we disable Apache HttpClient's stale connection checking, so without this thread running in the background, cleaning up old/inactive HTTP connections, we'd see more IO exceptions when stale connections (i.e. closed on the AWS side) are left in the connection pool, and requests grab one of them to begin executing a request.

嵌套类概要

从类继承的嵌套类/接口 java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

字段概要

从类继承的字段 java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

方法概要

方法

限定符和类型	方法和说明
static void	registerConnectionManager(org.apache.http.conn.ClientConnectionManager connectionManager)
static void	removeConnectionManager(org.apache.http.conn.ClientConnectionManager connectionManager)
void	run()
static void	shutdown() Shuts down the thread, allowing the class and instance to be collected.

从类继承的方法 java.lang.Thread

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

从类继承的方法 java.lang.Object

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

方法详细资料

registerConnectionManager

public static void registerConnectionManager(org.apache.http.conn.ClientConnectionManager connectionManager)

removeConnectionManager

public static void removeConnectionManager(org.apache.http.conn.ClientConnectionManager connectionManager)

run

public void run()

指定者:

run 在接口中 Runnable

覆盖:

run 在类中 Thread

shutdown

public static void shutdown()

Shuts down the thread, allowing the class and instance to be collected.

Since this is a daemon thread, its running will not prevent JVM shutdown. It will, however, prevent this class from being unloaded or garbage collected, in the context of a long-running application, until it is interrupted. This method will stop the thread's execution and clear its state. Any use of a service client will cause the thread to be restarted.