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[expand - 1 more] - Re: the different size of file through hadoop streaming - HDFS - [mail # user]
...I have known why.  When an executable is specified for mappers, each mapper task will launch the executable as a separate process when the mapper is initialized. As the mapper task runs...
   Author: 周梦想, 2013-02-01, 06:31
[expand - 2 more] - Re: how to start hadoop 1.0.4 backup node? - HDFS - [mail # user]
...yes, 1.1.x not appear, but document of  1.0.4 is still there.  2012/12/29 Harsh J  ...
   Author: 周梦想, 2012-12-29, 07:15
[expand - 2 more] - Re: why not hadoop backup name node data to local disk daily or hourly? - HDFS - [mail # user]
...thanks Tariq, Now we are trying to recover data,but some data has lost forever.  the logs just reported NULL Point Exception:   2012-12-17 17:09:05,646 ERROR org.apache.hadoop.hdfs...
   Author: 周梦想, 2012-12-25, 02:22
Re: How to troubleshoot OutOfMemoryError - HDFS - [mail # user]
...I encountered the OOM problem, because i don't set ulimit open files limit. It had nothing to do with Memory. Memory is sufficient.  Best Regards, Andy  2012/12/22 Manoj Babu  ...
   Author: 周梦想, 2012-12-24, 03:30
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