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Re: 2.0.3-alpha in pseudodristributed mode: How to force examples to run on yarn? - HDFS - [mail # user]
...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...
   Author: Harsh J, 2013-03-20, 00:06
[expand - 1 more] - Re: What happens when you have fewer input files than mapper slots? - HDFS - [mail # user]
...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...
   Author: Harsh J, 2013-03-20, 00:05
[HDFS-2541] For a sufficiently large value of blocks, the DN Scanner may request a random number with a negative seed value. - HDFS - [issue]
...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....
http://issues.apache.org/jira/browse/HDFS-2541    Author: Harsh J, 2013-03-19, 17:59
[expand - 2 more] - Re: java.lang.NoSuchMethodError ThreadSafeClientConnManager - HDFS - [mail # user]
...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 ...
   Author: Harsh J, 2013-03-19, 16:48
Re: On a small cluster can we double up namenode/master with tasktrackers? - HDFS - [mail # user]
...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...
   Author: Harsh J, 2013-03-19, 07:30
Re: Question regarding job execution - HDFS - [mail # user]
...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...
   Author: Harsh J, 2013-03-19, 05:54
Re: access hadoop cluster from ubuntu on laptop - HDFS - [mail # user]
...What George's suggested is more of a hack. If you want to write proper impersonation code that works despite the security toggle, follow http://hadoop.apache.org/docs/stable/Secure_Impersona...
   Author: Harsh J, 2013-03-18, 07:24
Re: OutOfMemory during Plain Java MapReduce - HDFS - [mail # user]
...Paul's way is much more easier than doing the serialization way I mentioned earlier. I didn't pay attention to the logic used but just the implementation, my bad :)  On Fri, Mar 8, 2013...
   Author: Harsh J, 2013-03-09, 00:55
Re: Job driver and 3rd party jars - HDFS - [mail # user]
...To be precise, did you use -libjar or -libjars? The latter is the right option.  On Fri, Mar 8, 2013 at 12:18 AM, Barak Yaish  wrote:    Harsh J...
   Author: Harsh J, 2013-03-08, 00:27
Re: mapred.max.tracker.failures - HDFS - [mail # user]
...It is a per-job config which controls the automatic job-level blacklist: If, for a single job, a specific tracker has failed 4 (or X) total tasks, then as prevent scheduling anymore of the j...
   Author: Harsh J, 2013-03-07, 06:02
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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