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https://issues.apache.org/jira/browse/HDFS-12979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17087738#comment-17087738
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Kihwal Lee commented on HDFS-12979:
-----------------------------------
This breaks rolling upgrade. Filed a blocker, HDFS-15287. I found it
disturbing that the new check in the image servlet is disabled for unit tests
(minidfscluster), but enabled by default.
> StandbyNode should upload FsImage to ObserverNode after checkpointing.
> ----------------------------------------------------------------------
>
> Key: HDFS-12979
> URL: https://issues.apache.org/jira/browse/HDFS-12979
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs
> Reporter: Konstantin Shvachko
> Assignee: Chen Liang
> Priority: Major
> Fix For: 2.10.0, 3.3.0, 3.1.4, 3.2.2
>
> Attachments: HDFS-12979-branch-2.001.patch, HDFS-12979.001.patch,
> HDFS-12979.002.patch, HDFS-12979.003.patch, HDFS-12979.004.patch,
> HDFS-12979.005.patch, HDFS-12979.006.patch, HDFS-12979.007.patch,
> HDFS-12979.008.patch, HDFS-12979.009.patch, HDFS-12979.010.patch,
> HDFS-12979.011.patch, HDFS-12979.012.patch, HDFS-12979.013.patch,
> HDFS-12979.014.patch, HDFS-12979.015.patch
>
>
> ObserverNode does not create checkpoints. So it's fsimage file can get very
> old making bootstrap of ObserverNode too long. A StandbyNode should copy
> latest fsimage to ObserverNode(s) along with ANN.
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