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Re: 2.0.3-alpha in pseudodristributed mode: How to force examples to run on yarn? - HDFS - [mail # user]
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...Do you have a mapred-site.xml configured with mapreduce.framework.name set to yarn? On Wed, Mar 20, 2013 at 12:28 AM, Jens Scheidtmann wrote: Harsh J...
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Author: Harsh J,
2013-03-20, 00:06
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Re: What happens when you have fewer input files than mapper slots? - HDFS - [mail # user]
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...Correction to my previous post: I completely missed https://issues.apache.org/jira/browse/MAPREDUCE-4520 which covers the MR config ends already in 2.0.3. My bad :) On Wed, Mar 20, 201...
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Author: Harsh J,
2013-03-20, 00:05
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Re: What happens when you have fewer input files than mapper slots? - HDFS - [mail # user]
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...You can leverage YARN's CPU Core scheduling feature for this purpose. It was added to the 2.0.3 release via https://issues.apache.org/jira/browse/YARN-2 and seems to fit your need exactly. H...
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Author: Harsh J,
2013-03-20, 00:04
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[HDFS-2541] For a sufficiently large value of blocks, the DN Scanner may request a random number with a negative seed value. - HDFS - [issue]
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...Running off 0.20-security, I noticed that one could get the following exception when scanners are used:DataXceiver java.lang.IllegalArgumentException: n must be positive at java.util.Random....
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http://issues.apache.org/jira/browse/HDFS-2541
Author: Harsh J,
2013-03-19, 17:59
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Re: java.lang.NoSuchMethodError ThreadSafeClientConnManager - HDFS - [mail # user]
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...It shouldn't be cached anywhere but try roll-restarting your tasktrackers after having done the replacement. On Tue, Mar 19, 2013 at 9:55 PM, Aji Janis wrote: Harsh ...
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Author: Harsh J,
2013-03-19, 16:48
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Re: java.lang.NoSuchMethodError ThreadSafeClientConnManager - HDFS - [mail # user]
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...Depending on the version of Hadoop in use, you'd either set mapreduce.task.classpath.user.precedence, mapreduce.user.classpath.first or mapreduce.job.user.classpath.first in your Job's confi...
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Author: Harsh J,
2013-03-19, 16:48
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Re: java.lang.NoSuchMethodError ThreadSafeClientConnManager - HDFS - [mail # user]
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...ZK is showing its runtime JVM classpath (from the JVM that invoked a ZK client), and not the ZK server's classpath. The path reported is the below, which is part of /opt/hadoop/lib itself: &...
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Author: Harsh J,
2013-03-19, 16:19
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Re: Need your help with Hadoop - HDFS - [mail # user]
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...You'd probably want to recheck your configuration of dfs.data.dir on the node16 (perhaps its overriding the usual default), to see if it is perhaps including more dirs than normal (and they ...
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Author: Harsh J,
2013-03-19, 14:57
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Re: On a small cluster can we double up namenode/master with tasktrackers? - HDFS - [mail # user]
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...I think its fine to keep it so long as you also monitor the nodes for issues during heavy load times and tweak slave configs appropriately when some resource is overused. On Mon, Mar 1...
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Author: Harsh J,
2013-03-19, 07:30
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Re: Question regarding job execution - HDFS - [mail # user]
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...I am assuming you refer to the YARN's CapacityScheduler. The CS in YARN does support parallel job (the right term is application, or 'app', not 'job' anymore, when speaking in YARN's c...
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Author: Harsh J,
2013-03-19, 05:54
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