Siyao Meng created HDDS-17117:
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Summary: Start OM HTTP server early and show OM startup progress
Key: HDDS-17117
URL: https://issues.apache.org/jira/browse/HDDS-17117
Project: Apache Ozone
Issue Type: Sub-task
Components: Ozone Manager
Reporter: Siyao Meng
Start the OM HTTP server right after Kerberos login in the OzoneManager
constructor, instead of in start(). Initialize metrics before it, start it only
once (including for inactive OMs in MiniOzoneHAClusterImpl), and stop it if the
constructor fails. Gate /serviceList, /snapshotList, /dbCheckpoint and
/v2/dbCheckpoint until OM is ready. Without the gate, /serviceList reports the
OM as LEADER while the Ratis server is not yet created.
Track phases: Initializing, Waiting for SCM, Opening OM DB, Loading snapshot
chain, Loading prefixes, Initializing snapshot manager, Starting Ratis,
Starting services, Replaying Raft log.
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