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https://issues.apache.org/jira/browse/HDDS-1649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16890407#comment-16890407
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Hudson commented on HDDS-1649:
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FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #16965 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/16965/])
HDDS-1649. On installSnapshot notification from OM leader, download (arp7: rev
cdc36fe286708b5ff12675599da8c7650744f064)
* (edit) hadoop-ozone/common/src/main/proto/OzoneManagerProtocol.proto
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OMDBCheckpointServlet.java
* (edit) hadoop-hdds/common/src/main/resources/ozone-default.xml
* (edit)
hadoop-hdds/common/src/main/java/org/apache/hadoop/ozone/OzoneConsts.java
* (edit)
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestOzoneManagerHA.java
* (edit)
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/MiniOzoneCluster.java
* (add)
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestOMRatisSnapshots.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OzoneManager.java
* (edit)
hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/MiniOzoneHAClusterImpl.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/ratis/OzoneManagerStateMachine.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/ratis/OzoneManagerRatisServer.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OMMetrics.java
* (edit)
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/snapshot/OzoneManagerSnapshotProvider.java
* (edit)
hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/exceptions/OMException.java
* (edit)
hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/OMConfigKeys.java
* (edit)
hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/protocol/OzoneManagerHAProtocol.java
> On installSnapshot notification from OM leader, download checkpoint and
> reload OM state
> ---------------------------------------------------------------------------------------
>
> Key: HDDS-1649
> URL: https://issues.apache.org/jira/browse/HDDS-1649
> Project: Hadoop Distributed Data Store
> Issue Type: Sub-task
> Reporter: Hanisha Koneru
> Assignee: Hanisha Koneru
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.5.0
>
> Time Spent: 13h 10m
> Remaining Estimate: 0h
>
> Installing a DB checkpoint on the OM involves following steps:
> 1. When an OM follower receives installSnapshot notification from OM leader,
> it should initiate a new checkpoint on the OM leader and download that
> checkpoint through Http.
> 2. After downloading the checkpoint, the StateMachine must be paused so that
> the old OM DB can be replaced with the new downloaded checkpoint.
> 3. The OM should be reloaded with the new state . All the services having a
> dependency on the OM DB (such as MetadataManager, KeyManager etc.) must be
> re-initialized/ restarted.
> 4. Once the OM is ready with the new state, the state machine must be
> unpaused to resume participating in the Ratis ring.
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