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From "Hui Fei (Jira)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-15616) Disable Observer NameNode to trigger edit log roll
Date Thu, 09 Sep 2021 11:25:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-15616?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hui Fei reassigned HDFS-15616:
------------------------------

    Assignee: Janus Chow

> Disable Observer NameNode to trigger edit log roll
> --------------------------------------------------
>
>                 Key: HDFS-15616
>                 URL: https://issues.apache.org/jira/browse/HDFS-15616
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs
>            Reporter: Janus Chow
>            Assignee: Janus Chow
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HDFS-15616.001.patch, HDFS-15616.002.patch, HDFS-15616.003.patch
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> Currently when Observer is transitioned from StandbyState, the editLogTailer will still
send the request to roll editLog to ActiveNN, which should be disabled to keep the definition
of "logRollPeriodMs" clear.
> One thing I'm not sure is for a cluster with multi standby Namenode, all the standby
NN will trigger the roll. Should this feature be extended to all standby NNs or implementing
on observers first?



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