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[HADOOP-9152] HDFS can report negative DFS Used on clusters with very small amounts of data - Hadoop - [issue]
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...I had a near empty HDFS instance where I was creating a file and deleting it very quickly. I noticed that HDFS sometimes reported a negative DFS used.root@brock0-1 ~]# sudo -u hdfs -i hdfs d...
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http://issues.apache.org/jira/browse/HADOOP-9152
Author: Brock Noland,
2012-12-22, 12:50
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Re: JVM is crashing for systems with NFS - Hadoop - [mail # general]
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...Hi, I have experienced this with non-hadoop applications although we typically saw the SIGBUS with Java 5. When it received the signal the JVM was trying to load a class from a jar on ...
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Author: Brock Noland,
2012-12-08, 17:28
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Re: Suitability of HDFS for live file store - Hadoop - [mail # user]
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...Hi, Harsh makes a good point, there is no explicit way to say "these files should remain in memory". However, I would note that give available RAM on the datanodes, the operating syste...
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Author: Brock Noland,
2012-10-15, 20:18
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Re: Suitability of HDFS for live file store - Hadoop - [mail # user]
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...Hi, Generally I do not see a problem with your plan of using HDFS to store these files, assuming they are updated rarely if ever. Hadoop is traditionally a batch system and MapReduce l...
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Author: Brock Noland,
2012-10-15, 20:05
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Re: [DISCUSS] Spin out MR, HDFS and YARN as their own TLPs and disband Hadoop umbrella project - Hadoop - [mail # general]
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...+1 As an observer, user, and sometimes contributor, I feel as though the project has been going smoothly over the past year. As such, I was quite surprised when this popped up. O...
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Author: Brock Noland,
2012-08-30, 14:43
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[ANNOUNCE] Apache MRUnit 0.9.0-incubating released - Hadoop - [mail # general]
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...The Apache MRUnit team is pleased to announce the release of MRUnit 0.9.0-incubating from the Apache Incubator. This is the fourth release of Apache MRUnit, a Java library that helps d...
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Author: Brock Noland,
2012-05-01, 14:11
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Re: Can't construct instance of class org.apache.hadoop.conf.Configuration - Hadoop - [mail # user]
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...Hi, I would try this: export CLASSPATH=$(hadoop classpath) Brock On Mon, Apr 30, 2012 at 10:15 AM, Ryan Cole wrote: ve at in ) ) thod) ava:308) Apa...
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Author: Brock Noland,
2012-04-30, 15:22
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Re: [VOTE] Rename hadoop branches post hadoop-1.x - Hadoop - [mail # general]
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...2 1 3 4 5 (non-binding) On Mon, Mar 19, 2012 at 5:41 PM, Shaneal Manek wrote: Apache MRUnit - Unit testing MapReduce - http://incubator.apache.org/mrunit/...
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Author: Brock Noland,
2012-03-20, 00:44
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[ANNOUNCE] Apache MRUnit 0.8.0-incubating released - Hadoop - [mail # user]
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...The Apache MRUnit team is pleased to announce the release of MRUnit 0.8.0-incubating from the Apache Incubator. This is the second release of Apache MRUnit, a Java library that helps d...
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Author: Brock Noland,
2012-02-02, 21:47
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Re: race condition in hadoop 0.20.2 (cdh3u1) - Hadoop - [mail # user]
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...Hi, tl;dr DUMMY should not be static. On Tue, Jan 17, 2012 at 3:21 PM, Stan Rosenberg wrote: This class is invalid. A single thread will be executing your mapper or r...
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Author: Brock Noland,
2012-01-17, 23:38
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