Nanda kumar created HDDS-1888:
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Summary: 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
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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