|
public UpdateAppServerPriority ( |
||
| appServerEndPoint | ||
| priority | int | |
| return | void | |
/// <summary>
/// Event handler that gets fired when a worker process is identified as being healthy after start up.
/// </summary>
private void WorkerIsHealthy(SIPAppServerWorker worker)
{
if (worker.IsHealthy())
{
m_sipCallDispatcherFile.UpdateAppServerPriority(worker.AppServerEndpoint, m_healthyPriority);
}
else
{
logger.Warn("An app server worker was unhealthy after the process initialisation period.");
}
}
/// <summary>
/// Method that gets spawned on a dedicated thread to manage an app server process.
/// </summary>
private void ManageWorker(XmlNode appServerWorkerNode)
{
try
{
SIPAppServerWorker appServerWorker = RecycleAppServer(null, 0, appServerWorkerNode);
string appServerSocket = appServerWorker.AppServerEndpoint.ToString();
Thread.CurrentThread.Name = "manage-" + appServerWorker.AppServerEndpoint.Port;
DateTime lastProbeTime = DateTime.MinValue;
while (!m_exit)
{
// Process checks.
if (!appServerWorker.NeedsImmediateRestart && !appServerWorker.NeedsToRestart)
{
if (appServerWorker.WorkerProcess != null && appServerWorker.WorkerProcess.HasExited)
{
// This is the only case where action is taken to immediately disable the use of a worker process outside of the access controlled
// RecycleAppServer method. The reason being there's no point attempting to use a worker process that has completely gone.
logger.Debug("Worker has disappeared for " + appServerSocket + ". Deactivating and marking for immediate restart.");
appServerWorker.NeedsImmediateRestart = true;
appServerWorker.IsDeactivated = true;
lock (m_appServerWorkers)
{
m_appServerWorkers.Remove(appServerWorker);
}
m_sipCallDispatcherFile.UpdateAppServerPriority(appServerWorker.AppServerEndpoint, m_unhealthyPriority);
}
else
{
appServerWorker.WorkerProcess.Refresh();
if (appServerWorker.WorkerProcess.PrivateMemorySize64 >= MAX_PHYSICAL_MEMORY)
{
logger.Debug("Memory limit reached on worker " + appServerSocket + " pid " + appServerWorker.ProcessID + ". Marking for graceful restart.");
appServerWorker.NeedsToRestart = true;
}
}
}
// Periodically send a SIP call probe to the app server socket.
if (!appServerWorker.NeedsImmediateRestart && !appServerWorker.NeedsToRestart &&
DateTime.Now.Subtract(lastProbeTime).TotalSeconds > m_probePeriodSeconds)
{
appServerWorker.SendProbe();
lastProbeTime = DateTime.Now;
}
// Restarts.
if (appServerWorker.NeedsImmediateRestart || appServerWorker.NeedsToRestart)
{
double secondsSinceLastStart = DateTime.Now.Subtract(appServerWorker.WorkerProcessStartTime).TotalSeconds;
if (secondsSinceLastStart < PROCESS_RESTART_DELAY_SECONDS)
{
int secondsDelay = PROCESS_RESTART_DELAY_SECONDS - Convert.ToInt32(secondsSinceLastStart % Int32.MaxValue);
logger.Debug("Waiting " + secondsDelay + " seconds before attempting to recycle worker on " + appServerSocket + ".");
Thread.Sleep(secondsDelay * 1000);
}
string recycleType = (appServerWorker.NeedsImmediateRestart) ? "immediate" : "graceful";
logger.Debug("Attempting to get lock for " + recycleType + " recycle for " + appServerSocket + " pid " + appServerWorker.ProcessID + ".");
if (Monitor.TryEnter(m_recycleLock, WAIT_FOR_RECYCLE_LOCK_SECONDS * 1000))
{
int recycleDelay = (appServerWorker.NeedsToRestart) ? PROCESS_RESTART_DELAY_SECONDS : 0;
appServerWorker = RecycleAppServer(appServerWorker, recycleDelay, appServerWorkerNode);
lastProbeTime = DateTime.Now;
Monitor.Exit(m_recycleLock);
}
else
{
logger.Debug("Failed to acquire recycle lock for " + appServerSocket + " pid " + appServerWorker.ProcessID + ".");
}
}
Thread.Sleep(CHECK_WORKER_PERIOD_SECONDS * 1000);
}
}
catch (Exception excp)
{
logger.Error("Exception ManageWorker. " + excp.Message);
}
finally
{
try
{
Monitor.Exit(m_recycleLock);
}
catch { }
}
}