ambari-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Alejandro Fernandez (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-9485) RU - Add more debugging information to HDFS prepare and finalize steps
Date Thu, 05 Feb 2015 20:04:34 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-9485?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alejandro Fernandez updated AMBARI-9485:
----------------------------------------
    Attachment:     (was: AMBARI-9485.patch)

> RU - Add more debugging information to HDFS prepare and finalize steps
> ----------------------------------------------------------------------
>
>                 Key: AMBARI-9485
>                 URL: https://issues.apache.org/jira/browse/AMBARI-9485
>             Project: Ambari
>          Issue Type: Task
>          Components: ambari-server
>    Affects Versions: 2.0.0
>            Reporter: Alejandro Fernandez
>            Assignee: Alejandro Fernandez
>             Fix For: 2.0.0
>
>         Attachments: AMBARI-9485.patch
>
>
> Add more debugging information for HDFS prepare and finalize steps.
> Prepare:
> 1. With HA setup, the current code requires the NameNode NOT in safemode when starting
RU.
> 2. With non-HA setup, the current code requires the NameNode in safemode when start RU.
> The reason is that for non-HA setup, we need to do an extra checkpoint in the single
NN (by calling saveNamespace), which requires the NN to be in safemode (to avoid namespace
modification during the checkpoint). But for HA-setup, the checkpoint is done by the standby
NN, thus we do not need to put the active NN into the safemode and in this way we can avoid
service downtime.
> We need to log what the original state is.
> Finalize:
> This has a confusing message related to https://issues.apache.org/jira/secure/attachment/12679263/HDFS-7340.001.patch
> {code}
> [root@c6404 ~]# su - hdfs -c 'hdfs dfsadmin -rollingUpgrade query'
> QUERY rolling upgrade ...
> Proceed with rolling upgrade:
>   Block Pool ID: BP-819970438-192.168.64.104-1423091248521
>      Start Time: Thu Feb 05 01:15:16 UTC 2015 (=1423098916798)
>   Finalize Time: <NOT FINALIZED>
> [root@c6404 ~]# su - hdfs -c 'hdfs dfsadmin -rollingUpgrade finalize'
> FINALIZE rolling upgrade ...
> There is no rolling upgrade in progress or rolling upgrade has already been finalized.
> [root@c6404 ~]# su - hdfs -c 'hdfs dfsadmin -rollingUpgrade query'
> QUERY rolling upgrade ...
> There is no rolling upgrade in progress or rolling upgrade has already been finalized.
> {code}
> This means that the finalize did happen.
> We should run another "hdfs dfsadmin -rollingUpgrade query" after finalize to ensure
this happened.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message