Ethan Rose created HDDS-4569:
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Summary: Add pre append gate and marker file to OM prepare state
Key: HDDS-4569
URL: https://issues.apache.org/jira/browse/HDDS-4569
Project: Hadoop Distributed Data Store
Issue Type: Sub-task
Components: OM
Reporter: Ethan Rose
Assignee: Ethan Rose
Add a gate to the pre append step of OzoneManagerStateMachine to block further
write requests from coming in when an ozone manager is prepared. Also add a
marker file that is written when the OM is prepared so that if it is restarted
without a special flag, it automatically enters prepare mode.
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