[
https://issues.apache.org/jira/browse/HDFS-9391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15800144#comment-15800144
]
Manoj Govindassamy commented on HDFS-9391:
------------------------------------------
Yes, in the example you gave both maintenanceOnlyReplicas and
outOfServiceOnlyReplicas are incremented. I see outOfServiceOnlyReplicas as
more of a cumulative number of both decommission and maintenance. The final
counts would be 2 for maintenanceOnlyReplicas and 3 for
outOfServiceOnlyReplicas.
>> In other words, maintenanceOnlyReplicas isn't strictly "all 3 replicas are
>> maintenance". Maybe this new definition is more desirable.
Yes, in the above example, all 3 replicas are in some sort of maintenance and
it is ok to have EnteringMaintenance page display "OutOfServiceOnlyReplicas".
But, in an another example, where only one node is in decommission and no other
nodes are in maintenance,
-- the Decommissioning page will rightly show 1 node in decommission. There is
no problem with this page.
-- the EnteringMaintenance page, if we start to use the new cumulative
"OutOfServiceOnlyReplicas", then this page also will show 1 node in maintenance
the same one which is decommissioning.
Hopefully you have thought about this case as well. The EnteringMaintenance
page behavior for the second example sounds ok to you ? Please let me know.
{noformat}
.put("maintenanceOnlyReplicas",
node.getLeavingServiceStatus().getOutOfServiceOnlyReplicas())
{noformat}
Once this open question is resolved, will attach the new patch incorporating
all pending changes. Thanks [~mingma].
> Update webUI/JMX to display maintenance state info
> --------------------------------------------------
>
> Key: HDFS-9391
> URL: https://issues.apache.org/jira/browse/HDFS-9391
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: 3.0.0-alpha1
> Reporter: Ming Ma
> Assignee: Manoj Govindassamy
> Attachments: HDFS-9391-MaintenanceMode-WebUI.pdf, HDFS-9391.01.patch,
> HDFS-9391.02.patch, Maintenance webUI.png
>
>
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
