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Re: How to fail the Name Node or how to crash the Name Node for testing Purpose. - MapReduce - [mail # user]
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...If I understand correctly, what you want to do is crash the namenode manually and recover it using secondary namenode? and you want to know both how to crash the namenode as well how t...
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Author: Nitin Pawar,
2013-06-19, 07:31
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Re: How to fail the Name Node or how to crash the Name Node for testing Purpose. - MapReduce - [mail # user]
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...are you testing it for HA? which version of hadoop are you using? can you explain your test scenario in detail On Wed, Jun 19, 2013 at 12:08 PM, Pavan Kumar Polineni wrote...
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Author: Nitin Pawar,
2013-06-19, 06:44
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Re: Unexpected end of input stream: how to locate related file(s)/ - MapReduce - [mail # user]
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...I think they are using hive, can he look at "INPUT__FILE__NAME" in hive. I have never tried it, so please pardon me if I am wrong On Wed, Jun 19, 2013 at 11:58 AM, Arun C ...
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Author: Nitin Pawar,
2013-06-19, 06:42
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Re: Application errors with one disk on datanode getting filled up to 100% - MapReduce - [mail # user]
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...Can you check individual datanode's storage health. As you said you got 80 servers writing parallely to hdfs, I am not sure can that be an issue. As suggested in past threads, you can do a r...
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Author: Nitin Pawar,
2013-06-10, 10:09
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Re: Application errors with one disk on datanode getting filled up to 100% - MapReduce - [mail # user]
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...when you say application errors out .. does that mean your mapreduce job is erroring? In that case apart from hdfs space you will need to look at mapred tmp directory space as well. yo...
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Author: Nitin Pawar,
2013-06-10, 09:41
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Re: Error while running a command - MapReduce - [mail # user]
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...can you check this http://www.params.me/2012/11/failed-to-load-class.html if you are hitting the same issue On Mon, May 27, 2013 at 4:02 PM, Aditya exalter wrote: ...
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Author: Nitin Pawar,
2013-05-27, 11:46
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Re: Read namenode data from primary memory - MapReduce - [mail # user]
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...if you want to use savenamespace then yes. Normally to have a backup copy of the FSImage, previously there was a secondary namenode and now there is checkpoint NN. SNN was deprecated b...
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Author: Nitin Pawar,
2013-05-14, 07:43
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Re: Read namenode data from primary memory - MapReduce - [mail # user]
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...every 5 minutes seems too much. why not do a daily or say 8 hours basis On Tue, May 14, 2013 at 12:51 PM, Sandeep Nemuri wrote: Nitin Pawar...
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Author: Nitin Pawar,
2013-05-14, 07:23
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Re: Read namenode data from primary memory - MapReduce - [mail # user]
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...if you do not put namenode in safemode that means your namenode can still accept request to write or delete files from hdfs. This may cause your snapshot to be a problematic in case you want...
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Author: Nitin Pawar,
2013-05-14, 07:01
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Re: Install Hadoop on Linux Pseudo Distributed Mode - Root Required? - MapReduce - [mail # user]
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...You do not root if you want to install everything in your home directory and assuming sun jdk is installed On May 13, 2013 8:13 PM, "Raj Hadoop" wrote: ...
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Author: Nitin Pawar,
2013-05-13, 14:47
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