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Re: NameNode low on available disk space
Can somebody answer me on this plz ?
On Wed, Jan 23, 2013 at 11:44 AM, Mohit Vadhera <
[EMAIL PROTECTED]> wrote:

> Thanks Guys, As you said the level is already pretty low i.e 100 MB but in
> my case the root fs / has 14 G available.  What can be the root cause then ?
>
> /dev/mapper/vg_operamast1-lv_root
>                        50G   33G   14G  71% /
>
> As per logs.
>     2013-01-21 01:22:52,217 WARN
> org.apache.hadoop.hdfs.server.namenode.NameNodeResourceChecker: Space
> available on volume '/dev/mapper/vg_operamast1-lv_root' is 10653696, which
> is below the configured reserved amount 104857600
>
>
> On Wed, Jan 23, 2013 at 11:13 AM, Harsh J <[EMAIL PROTECTED]> wrote:
>
>> Hi again,
>>
>> Yes, you need to add it to hdfs-site.xml and restart the NN.
>>
>> > Thanks Harsh, Do I need to add parameters in hdfs-site.xml and restart
>> service namenode.
>> > +  public static final String  DFS_NAMENODE_DU_RESERVED_KEY >> "dfs.namenode.resource.du.
>> reserved";
>> > +  public static final long    DFS_NAMENODE_DU_RESERVED_DEFAULT = 1024
>> * 1024 * 100; // 100 MB
>>
>>
>> On Wed, Jan 23, 2013 at 10:12 AM, Harsh J <[EMAIL PROTECTED]> wrote:
>>
>>> Edit your hdfs-site.xml (or whatever place of config your NN uses) to
>>> lower the value of property "dfs.namenode.resource.du.reserved". Create a
>>> new property if one does not exist, and set the value of space to a
>>> suitable level. The default itself is pretty low - 100 MB in bytes.
>>>
>>>
>>> On Wed, Jan 23, 2013 at 9:13 AM, Mohit Vadhera <
>>> [EMAIL PROTECTED]> wrote:
>>>
>>>> Ok Steve. I am forwarding my issue again to the list that you said. The
>>>> version is
>>>>
>>>> Hi,
>>>>
>>>> Namenode switches into safemode when it has low disk space on the root
>>>> fs / i have to manually run a command to leave it. Below are log messages
>>>> for low space on root / fs. Is there any parameter so that i can reduce
>>>> reserved amount.Hadoop 2.0.0-cdh4.1.2
>>>>
>>>> 2013-01-21 01:22:52,217 WARN
>>>> org.apache.hadoop.hdfs.server.namenode.NameNodeResourceChecker: Space
>>>> available on volume '/dev/mapper/vg_lv_root' is 10653696, which is below
>>>> the configured reserved amount 104857600
>>>> 2013-01-21 01:22:52,218 WARN
>>>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: NameNode low on
>>>> available disk space. Entering safe mode.
>>>> 2013-01-21 01:22:52,218 INFO org.apache.hadoop.hdfs.StateChange: STATE*
>>>> Safe mode is ON.
>>>>
>>>>
>>>>
>>>> On Wed, Jan 23, 2013 at 2:50 AM, Steve Loughran <
>>>> [EMAIL PROTECTED]> wrote:
>>>>
>>>>> [EMAIL PROTECTED]ist
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> Harsh J
>>>
>>
>>
>>
>> --
>> Harsh J
>>
>
>