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https://issues.apache.org/jira/browse/FLINK-22006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17311451#comment-17311451
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Yang Wang commented on FLINK-22006:
-----------------------------------
Yes, Fabric8 Kubernetes client supports to watch multiple ConfigMaps using a
single connection. Actually, we are watching all the TaskManager pods in a same
way.
For the implementation, wrapping {{Fabric8FlinkKubeClient#watchConfigMaps}}
with a dispatcher and single connection is a good solution. Then the caller
will not care about the implementation details and we do not need any changes
to the {{DefaultLeaderRetrievalService}} and
{{KubernetesLeaderRetrievalDriver}}.
> Could not run more than 20 jobs in a native K8s session when K8s HA enabled
> ---------------------------------------------------------------------------
>
> Key: FLINK-22006
> URL: https://issues.apache.org/jira/browse/FLINK-22006
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 1.12.2, 1.13.0
> Reporter: Yang Wang
> Priority: Critical
> Labels: k8s-ha
> Attachments: image-2021-03-24-18-08-42-116.png
>
>
> Currently, if we start a native K8s session cluster when K8s HA enabled, we
> could not run more than 20 streaming jobs.
>
> The latest job is always initializing, and the previous one is created and
> waiting to be assigned. It seems that some internal resources have been
> exhausted, e.g. okhttp thread pool , tcp connections or something else.
> !image-2021-03-24-18-08-42-116.png!
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