Manikandan R created YUNIKORN-2665:
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Summary: Gang app originator pod changes after restart
Key: YUNIKORN-2665
URL: https://issues.apache.org/jira/browse/YUNIKORN-2665
Project: Apache YuniKorn
Issue Type: Bug
Components: shim - kubernetes
Affects Versions: 1.5.0, 1.4.0, 1.3.0, 1.5.1, 1.5.2
Reporter: Manikandan R
Assignee: Manikandan R
Gang app choose the first pod (who created the app) as originator pod which
becomes the real driver pod later. While processing gang app specifically after
the placeholder creation and in the process of replacement, restart can lead to
the below described incorrect behaviour:
During restore, there is no guarantee on the ordering of pods from K8s lister
especially when all the pods created with the same second timestamp. k8s use
the seconds based timestamp, which means all pods created with in same second
has same timestamp. During this situation, which pod comes first from lister,
YK designate it as originator pod. So, any placeholder could become the
originator pod and actual originator pod has lost. This change could cause
rippling effects and needs to be fixed.
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