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https://issues.apache.org/jira/browse/HDFS-11844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoyu Yao resolved HDFS-11844.
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Resolution: Duplicate
> Ozone: Recover SCM state when SCM is restarted
> ----------------------------------------------
>
> Key: HDFS-11844
> URL: https://issues.apache.org/jira/browse/HDFS-11844
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone, scm
> Reporter: Weiwei Yang
> Assignee: Anu Engineer
>
> SCM losses its state once being restarted. This issue can be found by a
> simple test with following steps
> # Start NN, DN, SCM
> # Create several containers via SCM CLI
> # Restart DN
> # Get existing container info via SCM CLI, this step will fail with container
> doesn't exist error.
> {{ContainerManagerImpl}} maintains a cache of container mapping
> {{containerMap}}, if DN is restarted, this information is lost. We need a way
> to restore the state from DB in a background thread.
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