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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11448) JN log segment syncing should support HA upgrade
Date Thu, 04 May 2017 20:11:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15997365#comment-15997365
] 

Jing Zhao commented on HDFS-11448:
----------------------------------

+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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