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https://issues.apache.org/jira/browse/HDDS-1888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDDS-1888 started by Nanda kumar.
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> Add containers to node2container map in SCM as soon as a container is
> allocated
> -------------------------------------------------------------------------------
>
> Key: HDDS-1888
> URL: https://issues.apache.org/jira/browse/HDDS-1888
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: SCM
> Reporter: Nanda kumar
> Assignee: Nanda kumar
> Priority: Major
>
> In SCM node2container and node2pipeline maps are managed by NodeManager and
> pipeline2container map is managed by PipelineManager.
> Currently, when a container is allocated in SCM, it is added to
> pipeline2container map and we are not adding it to node2container map. We
> update the node2container map only when the datanode sends full container
> report.
> When a node is marked as dead, DeadNodeHandler processes the event and it
> gets the list of containers that are hosted by the dead datanode and updates
> the respective container replica state in ContainerManager. The list of
> containers on the datanode is read from node2container map, this map will be
> missing containers which are created recently (after the last container
> report). In such cases we not be able to remove the container replica
> information for those containers. In reality, these containers are under
> replicated, but SCM will never know.
> We should add containers to node2container map in SCM as soon as a container
> is allocated.
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