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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-3558) Warnings if RS times are out of sync
Date Tue, 12 Aug 2014 19:25:12 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3558?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell resolved HBASE-3558.
-----------------------------------

    Resolution: Not a Problem

Current releases include logic for logging this warning

> Warnings if RS times are out of sync
> ------------------------------------
>
>                 Key: HBASE-3558
>                 URL: https://issues.apache.org/jira/browse/HBASE-3558
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 0.89.20100924
>            Reporter: Sean Sechrist
>            Priority: Minor
>
> Last night we ran into a problem with the times on RSs being out of sync by 1 minute.
The times were being reset by ~70s often because we were getting different responses from
pool.ntpd.org.
> This caused lost ZK sessions and problems writing to datanodes,  so all the RSs kept
shutting down.
> I think it would be useful to have HBaseFsck check to see if the times on the region
servers are out of sync. Or maybe put a warning on the master web ui or something. 
> This seems related to HBASE-3168, but applies when region servers become out of sync
once they already joined the cluster (due to NTP issues or something else).



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