Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: common-user@hadoop.apache.org
Received-SPF: pass (athena.apache.org: domain of prasen.bea@gmail.com
 designates 209.85.216.204 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:sender:in-reply-to:references:date
         :x-google-sender-auth:message-id:subject:from:to:content-type
         :content-transfer-encoding;
        b=C0+xv5FnGMGD6ycQBg0cy5l3CUXwQna+MqO5oQhMvnNK5bc/YNvVlIrzSCK0gCCgO2
         TgpVRU1KeuMhvatuxOcAYTXomlcLi8mWt8/0JigGjZ9Rt/uKDXwLx/Oew9K1DVKbFc13
         gWNMZEOVUvQU4EbU5/VA/phUvVum/e/ixwswk=
MIME-Version: 1.0
Sender: prasen.bea@gmail.com
In-Reply-To: <944750dd1001182254j2f66e37dp445089032c062fb4@mail.gmail.com>
References: <500e4a1e1001182101m90a05er111427f26d8404fa@mail.gmail.com>
	 <C77B3E46.638A%amogh@yahoo-inc.com>
	 <500e4a1e1001182246l4dce739j68ed414d90b5f76@mail.gmail.com>
	 <944750dd1001182254j2f66e37dp445089032c062fb4@mail.gmail.com>
Date: Tue, 19 Jan 2010 12:39:14 +0530
Message-ID: <500e4a1e1001182309i3c81dac2y919b47bfa39ad3e8@mail.gmail.com>
Subject: Re: rmr: org.apache.hadoop.hdfs.server.namenode.SafeModeException:
	Cannot delete /op. Name node is in safe mode.
From: prasenjit mukherjee <pmukherjee@quattrowireless.com>
To: common-user@hadoop.apache.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

That was exactly the reason. Thanks  a bunch.

On Tue, Jan 19, 2010 at 12:24 PM, Mafish Liu <mafish@gmail.com> wrote:
> 2010/1/19 prasenjit mukherjee <pmukherjee@quattrowireless.com>:
>> =A0I run "hadoop fs -rmr .." immediately after start-all.sh =A0 =A0Does =
the
>> namenode always start in safemode and after sometime switches to
>> normal mode ? If that is the problem then your suggestion of waiting
>> might work. Lemme check.
>
> This is the point. Namenode will enter safemode on starting to gather
> metadata information of files, and then switch to normal mode. The
> time spent in safemode depends one the data scale in your HDFS.
>>
>> -Thanks for the pointer.
>> Prasen
>>
>> On Tue, Jan 19, 2010 at 10:47 AM, Amogh Vasekar <amogh@yahoo-inc.com> wr=
ote:
>>> Hi,
>>> When NN is in safe mode, you get a read-only view of the hadoop file sy=
stem. ( since NN is reconstructing its image of FS )
>>> Use =A0"hadoop dfsadmin -safemode get" to check if in safe mode.
>>> "hadoop dfsadmin -safemode leave" to leave safe mode forcefully. Or use=
 "hadoop dfsadmin -safemode wait" to block till NN leaves by itself.
>>>
>>> Amogh
>>>
>>>
>>> On 1/19/10 10:31 AM, "prasenjit mukherjee" <prasen.bea@gmail.com> wrote=
:
>>>
>>> Hmmm. =A0I am actually running it from a batch file. Is "hadoop fs -rmr=
"
>>> not that stable compared to pig's rm OR hadoop's FileSystem ?
>>>
>>> Let me try your suggestion by writing a cleanup script in pig.
>>>
>>> -Thanks,
>>> Prasen
>>>
>>> On Tue, Jan 19, 2010 at 10:25 AM, Rekha Joshi <rekhajos@yahoo-inc.com> =
wrote:
>>>> Can you try with dfs/ without quotes?If using pig to run jobs you can =
use rmf within your script(again w/o quotes) to force remove and avoid erro=
r if file/dir not present.Or if doing this inside hadoop job, you can use F=
ileSystem/FileStatus to delete directories.HTH.
>>>> Cheers,
>>>> /R
>>>>
>>>> On 1/19/10 10:15 AM, "prasenjit mukherjee" <prasen.bea@gmail.com> wrot=
e:
>>>>
>>>> "hadoop fs -rmr /op"
>>>>
>>>> That command always fails. I am trying to run sequential hadoop jobs.
>>>> After the first run all subsequent runs fail while cleaning up ( aka
>>>> removing the hadoop dir created by previous run ). What can I do to
>>>> avoid this ?
>>>>
>>>> here is my hadoop version :
>>>> # hadoop version
>>>> Hadoop 0.20.0
>>>> Subversion https://svn.apache.org/repos/asf/hadoop/core/branches/branc=
h-0.20
>>>> -r 763504
>>>> Compiled by ndaley on Thu Apr =A09 05:18:40 UTC 2009
>>>>
>>>> Any help is greatly appreciated.
>>>>
>>>> -Prasen
>>>>
>>>>
>>>
>>>
>>
>
>
>
> --
> Mafish@gmail.com
>