[
https://issues.apache.org/jira/browse/HADOOP-1133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12483759
]
dhruba borthakur commented on HADOOP-1133:
------------------------------------------
Hi Raghu, thanks for your comments. I am printing the datanodes in the log
because I am looking at this as a support tool and would liekto capture as much
data as possible in the log. I can then ask a cluster administrator to run this
tool and i will have everything I need to analyze the cluster. I would hate to
ask the cluster admin to run multiple commands to generate the info I need.
Regarding the locking question: you are right that we might be a getting a
consistent picture of all the data structures that are being dumped. But each
structure is locked individually, this should avoid causing any exceptions.
> Tools to analyze and debug namenode on a production cluster
> -----------------------------------------------------------
>
> Key: HADOOP-1133
> URL: https://issues.apache.org/jira/browse/HADOOP-1133
> Project: Hadoop
> Issue Type: Improvement
> Components: dfs
> Reporter: dhruba borthakur
> Assigned To: dhruba borthakur
> Attachments: metasave.patch
>
>
> I would like to have a tool that dumps namenode data structures to a log
> file. This is especially useful in debugging a production cluster where
> attaching a debugger to the namenode is not a feasible option.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
