Weiwei Yang created HDFS-11844:
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Summary: 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: Weiwei Yang
SCM losses its state once being restarted. A simple test can be done by
following steps
# Start NN, DN, SCM
# Create several containers via SCM CLI
# Restart SCM
# Get existing container state via SCM CLI, this step will fail with container
doesn't exist error.
{{ContainerManagerImpl}} maintains a cache of container mapping
{{containerMap}}, if SCM is restarted, this information is lost. We need a way
to restore the state from DB in a background thread.
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