/// <summary>
/// Query task info
/// </summary>
private void QueryTaskInfo()
{
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Verbose, "[JobMonitorEntry] Enters QueryTaskInfo method.");
if (Interlocked.Increment(ref this.registerdPullTask) != 1)
{
// register count doesn't change from 0 to 1 means somebody is pulling task, quit
return;
}
bool shouldExit = false;
List <TaskInfo> taskInfoList = null;
this.pullTaskGap = PullTaskMinGap;
while (true)
{
try
{
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Verbose, "[JobMonitorEntry] Starting get job counters.");
ISchedulerJobCounters counters = this.schedulerJob.GetCounters();
JobInfo jobInfo = new JobInfo(this.sessionid, counters);
JobState state = this.schedulerJob.State;
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Information, "[JobMonitorEntry] Starting query task info: JobState = {0}\nJobInfo: {1}", state, jobInfo);
if (state != this.previousState)
{
this.previousState = state;
if (this.context != null)
{
// Bug 7144: dispose JobMonitorEntry instance and unsubscribe events if job state changed to Canceled/Finished/Failed
shouldExit = (0 == isRequeuingJob) && (state == JobState.Canceled || state == JobState.Finished || state == JobState.Failed);
try
{
// ignore JobState change that happened during job requeue operation.
// Note: requeue job takes 3 steps: cancel job, configure job, submit job. Job state transitions during job requeue, i.e.,
// (running) -> cancelling -> cancelled -> configuring -> submitted -> validating ->(queued), will all be ignored.
if (0 == this.isRequeuingJob)
{
ISchedulerNotify proxy = this.context;
proxy.JobStateChanged(JobStateConverter.FromHpcJobState(state)).ContinueWith(this.OnEndJobStateChanged);
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Information, "[JobMonitorEntry] Job state change event triggered, new state: {0}", state);
}
}
catch (CommunicationException e)
{
// Channel is aborted, set the context to null
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Error, "[JobMonitorEntry] Callback channel is aborted: {0}", e);
this.context = null;
}
catch (Exception e)
{
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Error, "[JobMonitorEntry] Failed to trigger job state change event: {0}", e);
}
}
}
if (this.context != null && (taskInfoList == null || !jobInfo.Equals(this.previousJobInfo)))
{
try
{
taskInfoList = this.GetTaskInfo();
if (taskInfoList != null)
{
ISchedulerNotify proxy = this.context;
proxy.TaskStateChanged(taskInfoList).ContinueWith(this.OnEndTaskStateChanged, jobInfo);
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Information, "[JobMonitorEntry] Task state change event triggered.");
}
}
catch (CommunicationException e)
{
// Channel is aborted, set the context to null
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Error, "[JobMonitorEntry] Callback channel is aborted: {0}", e);
this.context = null;
}
catch (Exception e)
{
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Error, "[JobMonitorEntry] Failed to trigger task state change event: {0}", e);
}
}
}
catch (Exception e)
{
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Warning, "[JobMonitorEntry] Exception thrown when querying task info: {0}", e);
}
// pull task is not registered, quit
if (Interlocked.Decrement(ref this.registerdPullTask) == 0)
{
break;
}
TraceHelper.TraceEvent(this.sessionid, TraceEventType.Information, "[JobMonitorEntry] Waiting {0} miliseconds and start another round of getting task info.", this.pullTaskGap);
// Sleep and pull task again, clear the register pull task flag
Thread.Sleep(this.pullTaskGap);
if (this.pullTaskGap < PullTaskMaxGap)
{
this.pullTaskGap *= 2;
if (this.pullTaskGap > PullTaskMaxGap)
{
this.pullTaskGap = PullTaskMaxGap;
}
}
this.registerdPullTask = 1;
}
if (shouldExit)
{
if (this.Exit != null)
{
this.Exit(this, EventArgs.Empty);
}
}
}