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Posted to common-issues@hadoop.apache.org by "Karthik Palanisamy (JIRA)" <ji...@apache.org> on 2018/05/07 07:04:00 UTC
[jira] [Updated] (HADOOP-15449) Frequent Namenode Flipover
affecting user Jobs.
[ https://issues.apache.org/jira/browse/HADOOP-15449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Karthik Palanisamy updated HADOOP-15449:
----------------------------------------
Attachment: HADOOP-15449.patch
> Frequent Namenode Flipover affecting user Jobs.
> -----------------------------------------------
>
> Key: HADOOP-15449
> URL: https://issues.apache.org/jira/browse/HADOOP-15449
> Project: Hadoop Common
> Issue Type: Wish
> Components: common
> Affects Versions: 2.7.4
> Reporter: Karthik Palanisamy
> Priority: Critical
> Attachments: HADOOP-15449.patch
>
>
> We observed from several users regarding Namenode flip-over is due to either zookeeper disk slowness (higher fsync cost) or network issue. We would need to avoid flip-over issue to some extent by increasing HA session timeout, ha.zookeeper.session-timeout.ms.
> Default value 5000 ms, seems very low in any production environment. I would suggest 10000 ms as default session timeout.
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