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[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
Re: Best practices for adding services to Hadoop cluster? - HDFS - [mail # user]
...Can the mapper not directly talk to whatever application server the Windows server runs? Is the work needed to be done in the map step (i.e. per record)? If not, you can perhaps also conside...
   Author: Harsh J, 2013-03-07, 05:21
Re: location of log files for mapreduce job run through eclipse - HDFS - [mail # user]
...If you've not changed any configs, look under /tmp/hadoop-${user.name}/ perhaps.  On Thu, Mar 7, 2013 at 3:19 AM, Sayan Kole  wrote:    Harsh J...
   Author: Harsh J, 2013-03-07, 01:01
Re: preferential distribution of tasks to tasktracker by jobtracker based on specific criteria (cpu frequency) - HDFS - [mail # user]
...MRv1: Both the CapacityScheduler and FairScheduler support some form of resource aware scheduling (Capacity supports memory provisions while Fair provides an interface you can plug into to i...
   Author: Harsh J, 2013-03-07, 01:00
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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