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https://issues.apache.org/jira/browse/HDFS-6023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13913539#comment-13913539
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Jing Zhao commented on HDFS-6023:
---------------------------------

{code}
+  @VisibleForTesting
+  public void triggerRollbackCheckpoint() {
{code}

Looks like this is not necessary. Other than that +1.

> Test whether the standby NN continues  to checkpoint after the prepare stage
> ----------------------------------------------------------------------------
>
>                 Key: HDFS-6023
>                 URL: https://issues.apache.org/jira/browse/HDFS-6023
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, ha, hdfs-client, namenode
>            Reporter: Haohui Mai
>            Assignee: Haohui Mai
>         Attachments: HDFS-6023.000.patch
>
>
> This jira introduces new unit test to ensure that the standby NN continues to 
> checkpoint after it creates the rollback fsimage.



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