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https://issues.apache.org/jira/browse/YARN-10589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17276992#comment-17276992
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Qi Zhu commented on YARN-10589:
-------------------------------
[~ztang] [~tanu.ajmera]
I attached a new patch 003 based 002 , i think return PARTITION_SKIPPED will
return and get next PRIORITY_SKIPPED in :
{code:java}
while (iter.hasNext()) {
FiCaSchedulerNode node = iter.next();
if (reservedContainer == null) {
result = preCheckForNodeCandidateSet(clusterResource, node,
schedulingMode, resourceLimits, schedulerKey);
if (null != result) {
if (result == ContainerAllocation.PARTITION_SKIPPED) {
return result;
} else {
continue;
}
}
}
{code}
Thanks.
> Improve logic of multi-node allocation
> --------------------------------------
>
> Key: YARN-10589
> URL: https://issues.apache.org/jira/browse/YARN-10589
> Project: Hadoop YARN
> Issue Type: Task
> Affects Versions: 3.3.0
> Reporter: Tanu Ajmera
> Assignee: Tanu Ajmera
> Priority: Major
> Attachments: YARN-10589-001.patch, YARN-10589-002.patch,
> YARN-10589-003.patch
>
>
> {code:java}
> for (String partititon : partitions) {
> if (current++ > start) {
> break;
> }
> CandidateNodeSet<FiCaSchedulerNode> candidates =
> cs.getCandidateNodeSet(partititon);
> if (candidates == null) {
> continue;
> }
> cs.allocateContainersToNode(candidates, false);
> }{code}
> In above logic, if we have thousands of node in one partition, we will still
> repeatedly access all nodes of the partition thousands of times. There is no
> break point where if the partition is not same for the first node, it should
> stop checking other nodes in that partition.
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