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MapReduce >> mail # user >> Re: mapper and reducer task failure


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Re: mapper and reducer task failure
Two things you can validate.

1. Check the directory permission on your DN side, because there is some
issue while creating symbolic link.

2. Check the allocated memory at DN side for mapper/reducer.

Thanks
On Thu, Aug 15, 2013 at 8:38 PM, Pradeep Singh <[EMAIL PROTECTED]>wrote:

>  hadoop-1.2.1
> Regards
> Pradeep Singh
>
>
> On Thu, Aug 15, 2013 at 8:22 PM, Jitendra Yadav <
> [EMAIL PROTECTED]> wrote:
>
>> Which version of hadoop you are using?
>>
>>
>> On Thu, Aug 15, 2013 at 8:05 PM, Pradeep Singh <[EMAIL PROTECTED]>wrote:
>>
>>>  Hi RaJ,
>>> I am using ubuntu 13.04 . and running hadoop with root user
>>> Regards
>>> Pradeep Singh
>>>
>>>
>>> On Thu, Aug 15, 2013 at 7:29 PM, Raj K Singh <[EMAIL PROTECTED]>wrote:
>>>
>>>>  it seems that you are running hadoop locally on windows using cygwin
>>>> and having a problem of permission.
>>>>
>>>> ::::::::::::::::::::::::::::::::::::::::
>>>> Raj K Singh
>>>> http://www.rajkrrsingh.blogspot.com
>>>> Mobile  Tel: +91 (0)9899821370
>>>>
>>>>
>>>> On Thu, Aug 15, 2013 at 7:10 PM, Pradeep Singh <
>>>> [EMAIL PROTECTED]> wrote:
>>>>
>>>>>   Hi all ,
>>>>> I am new to Hadoop .I am not sure if my question is stupid or not .
>>>>> But still .
>>>>> I am running wordcount example and getting below error :
>>>>> Command to run :
>>>>> bin/hadoop jar hadoop-examples-1.2.1.jar WordCount /user/root/input/*
>>>>> /user/root/output
>>>>>
>>>>> MapAttempt TASK_TYPE="SETUP" TASKID="task_201308151750_0011_m_000003"
>>>>> TASK_ATTEMPT_ID="attempt_201308151750_0011_m_000003_1" TASK_STATUS="FAILED"
>>>>> FINISH_TIME="1376572981053" HOSTNAME="pradeep-pc"
>>>>> ERROR="java\.lang\.Throwable: Child Error
>>>>>     at
>>>>> org\.apache\.hadoop\.mapred\.TaskRunner\.run(TaskRunner\.java:271)
>>>>> Also i have attachmet my log file from dfs
>>>>> Regards
>>>>> Pradeep
>>>>>
>>>>
>>>>
>>>
>>
>
+
Pradeep Singh 2013-08-15, 13:40
+
Raj K Singh 2013-08-15, 13:59
+
Pradeep Singh 2013-08-15, 14:35
+
Jitendra Yadav 2013-08-15, 14:52
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB