hadoop-common-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HADOOP-15449) Frequent Namenode Flipover affecting user Jobs.
Date Mon, 07 May 2018 14:31:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arpit Agarwal reassigned HADOOP-15449:
--------------------------------------

    Assignee: Karthik Palanisamy

> 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
>            Assignee: 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 is 5000 ms, seems very low in any production environment.  I would suggest
10000 ms as default session timeout.
>  
> {code}
> ..
> 2018-05-04 03:54:36,848 INFO  zookeeper.ClientCnxn (ClientCnxn.java:run(1140)) - Client
session timed out, have not heard from server in 4689ms for sessionid 0x260e24bac500aa3, closing
socket connection and attempting reconnect 
> 2018-05-04 03:56:49,088 INFO  zookeeper.ClientCnxn (ClientCnxn.java:run(1140)) - Client
session timed out, have not heard from server in 3981ms for sessionid 0x360fd152b8700fe, closing
socket connection and attempting reconnect
> .. 
> {code}



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: common-issues-help@hadoop.apache.org


Mime
View raw message