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https://issues.apache.org/jira/browse/HDFS-11448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15997365#comment-15997365
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Jing Zhao commented on HDFS-11448:
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+1 for the 03 patch. Thank you for the work [~hanishakoneru]! Thank you for the
review, [~arpitagarwal]!
> JN log segment syncing should support HA upgrade
> ------------------------------------------------
>
> Key: HDFS-11448
> URL: https://issues.apache.org/jira/browse/HDFS-11448
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs
> Reporter: Hanisha Koneru
> Assignee: Hanisha Koneru
> Attachments: HDFS-11448.001.patch, HDFS-11448.002.patch,
> HDFS-11448.003.patch
>
>
> HDFS-4025 adds support for sychronizing past log segments to JNs that missed
> them. But, as pointed out by [~jingzhao], if the segment download happens
> when an admin tries to rollback, it might fail ([see
> comment|https://issues.apache.org/jira/browse/HDFS-4025?focusedCommentId=15850633&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15850633]).
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