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https://issues.apache.org/jira/browse/TEZ-1742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14200161#comment-14200161
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Rajesh Balamohan commented on TEZ-1742:
---------------------------------------
Any reason why request is added to highestPriRequests when the priorities are
the same
{code}
else if (request.getPriority().equals(highestPriRequest.getPriority())) {
highestPriRequests.add(request);
}
{code}
{code}
List<CookieContainerRequest> highestPriRequests
{code}
This is used for checking the number of highest priority requests. Is it
possible to maintain an int instead of list?
Please remove the unused LinkedHashSet import statement.
> Improve response time of internal preemption
> --------------------------------------------
>
> Key: TEZ-1742
> URL: https://issues.apache.org/jira/browse/TEZ-1742
> Project: Apache Tez
> Issue Type: Task
> Reporter: Bikas Saha
> Assignee: Bikas Saha
> Attachments: TEZ-1742.1.patch
>
>
> Tez YARN Task Scheduler currently preempts 1 running task at a time when a
> higher priority task is waiting and there are no available resources. When a
> large number of higher priority tasks are pending then it can take a long
> time to preempt the required number of lower priority tasks.
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