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Hadoop >> mail # dev >> Re: HDFS-758 in Hadoop-21 , Updates to  Namenode health page

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Re: HDFS-758 in Hadoop-21 , Updates to  Namenode health page
I am in favor of committing this to 0.21 because imo it is
not a new HDFS feature but rather an improvement of web UI.

Allen Wittenauer wrote:
 >     Then you'll have no issues patching other things in 0.21 that are actual
 > bug fixes that also meet this criteria, right?  Or does this only apply to
 > things that Yahoo! is hitting/deemed worthy?

I don't see what is the problem here.
Yahoo! developers detected, fixed and tested the problem, then called for a vote for inclusion.
If others have similar critical problems, they can also fix them and call for a vote.

I might miss some context here, could you please clarify.


> On 11/25/09 12:03 PM, "Tsz Wo (Nicholas), Sze" <[EMAIL PROTECTED]>
> wrote:
>> +1 on committing it to 0.21
>> I also agree that it does not impact the 0.21 release since the patch is
>> already done.  The argument of not committing it to 0.21 would be either (1)
>> the patch is not safe, or (2) the patch is not that useful.  I don't see they
>> are the cases here.
>> Nicholas Sze
>> ----- Original Message ----
>>> From: Jakob Homan <[EMAIL PROTECTED]>
>>> Sent: Wed, November 25, 2009 11:31:08 AM
>>> Subject: Re: HDFS-758 in Hadoop-21 , Updates to  Namenode health page
>>> +1. Backporting this does not in any way impact the release of 21.
>>> -Jakob
>>> Hairong Kuang wrote:
>>>> +1. Although this is a new feature, I'd like to have it committed to 0.21
>>>> since we have so many issues with delayed decomission recently.
>>>> Hairong
>>>> On 11/24/09 6:06 PM, "Suresh Srinivas" wrote:
>>>>> +1. This will also help debug the issues when decommissioning takes a long
>>>>> time to complete.
>>>>> On 11/23/09 7:36 PM, "Jitendra Nath Pandey" wrote:
>>>>>> Hi,
>>>>>>>    We will be committing some changes to the Namenode Health page
>>>>>>> (dfshealth.jsp) as part of the fix in HDFS-758. This will enable us to
>>>>>>> monitor the progress of decommissioning of datanodes more effectively.
>>>>>>>    Summary of changes :
>>>>>>>    1. A new link on the page for Decommissioning nodes.
>>>>>>>    2. This link will point to a new page with details about
>>>>>>> decommissioning
>>>>>>> status for each node which include
>>>>>>>         a) Number of under-relplicated blocks in the node.
>>>>>>>         b) Number of blocks with only no live replica (i.e. All its
>>> replicas
>>>>>>> are on decommissioning nodes).
>>>>>>>         c) Number of under-replicated blocks in open files.
>>>>>>>        d) Time since decommissioning started.
>>>>>>>    3. The main page will also contain total number of under-replicated
>>>>>>> blocks
>>>>>>> in the cluster.
>>>>>>> Thanks
>>>>>>> jitendra