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https://issues.apache.org/jira/browse/FLINK-34655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rui Fan resolved FLINK-34655.
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Resolution: Fixed
> Autoscaler doesn't work for flink 1.15
> --------------------------------------
>
> Key: FLINK-34655
> URL: https://issues.apache.org/jira/browse/FLINK-34655
> Project: Flink
> Issue Type: Bug
> Components: Autoscaler
> Reporter: Rui Fan
> Assignee: Rui Fan
> Priority: Major
> Labels: pull-request-available
> Fix For: kubernetes-operator-1.8.0
>
>
> flink-ubernetes-operator is committed to supporting the latest 4 flink minor
> versions, and autoscaler is a part of flink-ubernetes-operator. Currently,
> the latest 4 flink minor versions are 1.15, 1.16, 1.17 and 1.18.
> But autoscaler doesn't work for flink 1.15.
> h2. Root cause:
> * FLINK-28310 added some properties in IOMetricsInfo in flink-1.16
> * IOMetricsInfo is a part of JobDetailsInfo
> * JobDetailsInfo is necessary for autoscaler [1]
> * flink's RestClient doesn't allow miss any property during deserializing the
> json
> That means that the RestClient after 1.15 cannot fetch JobDetailsInfo for
> 1.15 jobs.
> h2. How to fix it properly?
> - [[FLINK-34655](https://issues.apache.org/jira/browse/FLINK-34655)] Copy
> IOMetricsInfo to flink-autoscaler-standalone module
> - Removing them after 1.15 are not supported
> [1]
> https://github.com/apache/flink-kubernetes-operator/blob/ede1a610b3375d31a2e82287eec67ace70c4c8df/flink-autoscaler/src/main/java/org/apache/flink/autoscaler/ScalingMetricCollector.java#L109
> [2]
> https://cwiki.apache.org/confluence/display/FLINK/FLIP-401%3A+REST+API+JSON+response+deserialization+unknown+field+tolerance
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