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https://issues.apache.org/jira/browse/YUNIKORN-2933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17891814#comment-17891814
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wangzhihui commented on YUNIKORN-2933:
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hi, [~wilfreds]
At present, Yunikorn isn't ready to support the "duplicate name" feature.
Suppose duplicate names have different resources and different tolerations.
Then Yunikorn is unable to handle them now. which could lead to some unexpected
results. Before that, we should restrict the usage methods.
> Don't add duplicated taskGroup to app
> -------------------------------------
>
> Key: YUNIKORN-2933
> URL: https://issues.apache.org/jira/browse/YUNIKORN-2933
> Project: Apache YuniKorn
> Issue Type: Bug
> Components: shim - kubernetes
> Affects Versions: 1.3.0, 1.5.2
> Reporter: Xiaobao Wu
> Priority: Minor
> Labels: pull-request-available
>
> When the app processes the _yunikorn.apache.org/task-groups_ annotation
> on Pod, it did not consider the case of taskgroup with the same name (i.e.
> taskgroup with the same {*}name{*}).For example, the following task-groups
> information is defined:
>
> {code:java}
> yunikorn.apache.org/task-groups='
> [{
> "name": "spark-executor",
> "minMember": 2,
> "minResource": {
> "cpu": "1",
> "memory": "1Gi"
> }
> }, {
> "name": "spark-driver",
> "minMember": 1,
> "minResource": {
> "cpu": "1",
> "memory": "1Gi"
> }
> },
> {
> "name": "spark-executor",
> "minMember": 1,
> "minResource": {
> "cpu": "2",
> "memory": "2Gi"
> }
> }
> ]
> '{code}
> From the above example, it can be seen that there are two task-group with
> *the same name* in the task-groups. So, after these ph Tasks are created, if
> an executor task (2C 2G)
> try to allocate placeholder‘s resource, it may erroneously release the ph
> task in the *spark-executor* group with a resource specification of 1C 1G
> (because the resource specification cannot meet 2C 2G). In this regard, I
> think that before properly handling ph tasks with different resource
> specifications within the same task group, it is necessary to avoid having
> two task-group with the same name but different resource specifications in
> the app.
>
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