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https://issues.apache.org/jira/browse/HDFS-16902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tao Li resolved HDFS-16902.
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Fix Version/s: 3.3.9
Resolution: Fixed
> Add Namenode status to BPServiceActor metrics and improve logging in
> offerservice
> ---------------------------------------------------------------------------------
>
> Key: HDFS-16902
> URL: https://issues.apache.org/jira/browse/HDFS-16902
> Project: Hadoop HDFS
> Issue Type: Task
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0, 3.2.5, 3.3.9
>
>
> Recently came across an k8s environment where randomly some datanode pods are
> not able to stay connected to all namenode pods (e.g. last heartbeat time
> stays higher than 2 hr sometimes). When any standby namenode becomes active,
> any datanode that is not heartbeating to it for quite sometime would not be
> able to send any further block reports, leading to missing replicas
> immediately after namenode failover, which could only be resolved with
> datanode pod restart.
> While the issue seems env specific, BPServiceActor's offer service could use
> some logging improvements. It is also good to get namenode status exposed
> with BPServiceActorInfo to identify any lags from datanode side in
> recognizing updated Active namenode status with heartbeats.
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