Karthik Palanisamy created HADOOP-15449:
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Summary: 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
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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