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https://issues.apache.org/jira/browse/HDFS-8821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15347819#comment-15347819
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Hudson commented on HDFS-8821:
------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #10014 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/10014/])
HDFS-8821. Stop tracking CHANGES.txt in the HDFS-1312 feature branch. (arp: rev
4b93ddae07ba4332f40f896542ee2c6d7bf899ed)
* hadoop-hdfs-project/hadoop-hdfs/pom.xml
* hadoop-hdfs-project/hadoop-hdfs/HDFS-1312_CHANGES.txt
> Explain message "Operation category X is not supported in state standby"
> -------------------------------------------------------------------------
>
> Key: HDFS-8821
> URL: https://issues.apache.org/jira/browse/HDFS-8821
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Gautam Gopalakrishnan
> Assignee: Gautam Gopalakrishnan
> Priority: Minor
> Fix For: 2.8.0
>
> Attachments: HDFS-8821-1.patch, HDFS-8821-2.patch
>
>
> There is one message specifically that causes many users to question the
> health of their HDFS cluster, namely "Operation category READ/WRITE is not
> supported in state standby".
> HDFS-3447 is an attempt to lower the logging severity for StandbyException
> related messages but it is not resolved yet. So this jira is an attempt to
> explain this particular message so it appears less scary.
> The text is question 3.17 in the Hadoop Wiki FAQ
> ref:
> https://wiki.apache.org/hadoop/FAQ#What_does_the_message_.22Operation_category_READ.2FWRITE_is_not_supported_in_state_standby.22_mean.3F
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