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setJarByClass method semantics - Hadoop - [mail # user]
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...Hi guys: What does the setJarByClass method do, if for example ,a given class does not exist inside of a JAR file? For example, in the case that we are running compiled java clas...
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Author: Jay Vyas,
2012-10-05, 22:00
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Re: resetting conf/ parameters in a life cluster. - Hadoop - [mail # user]
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...hmmm.... I wonder if there is a way to push conf/*xml parameters out to all the slaves, maybe at runtime ? On Sat, Aug 18, 2012 at 4:06 PM, Harsh J wrote: Jay Vyas ...
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Author: Jay Vyas,
2012-08-18, 15:16
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resetting conf/ parameters in a life cluster. - Hadoop - [mail # user]
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...Hi guys: I've reset my max counters as follows : ./hadoop-site.xml: mapreduce.job.counters.limit15000 However, a job is failing (after reducers get to 100%!) at the v...
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Author: Jay Vyas,
2012-08-18, 15:01
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Hadoop idioms for reporting cluster and counter stats. - Hadoop - [mail # user]
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...Hi guys : I want to start automating the output of counter stats, cluster size, etc... at the end of the main map reduce jobs which we run. Is there a simple way to do this ? &nb...
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Author: Jay Vyas,
2012-08-16, 17:07
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Re: Mechanism of hadoop -jar - Hadoop - [mail # user]
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...Sorry for the confusion... To be clear It is TOTALLY okay to jar up a text file and access it in hadoop via the class.getResource(...) api ! 1) Hadoop doesn't do anything funny with th...
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Author: Jay Vyas,
2012-08-12, 02:09
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Mechanism of hadoop -jar - Hadoop - [mail # user]
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...Hi guys: I'm trying to find documentation on how "hadoop jar" actually works i.e. how it copies/runs the jar file across the cluster, in order to debug a jar issue. 1) Where can ...
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Author: Jay Vyas,
2012-08-11, 22:09
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Re: Merge Reducers Output - Hadoop - [mail # user]
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...Its not clear to me that you need custom input formats.... 1) Getmerge might work or 2) Simply run a SINGLE reducer job (have mappers output static final int key=1, or specify nu...
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Author: Jay Vyas,
2012-07-31, 05:08
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EMR classpath overiding over all mappers/reducers - Hadoop - [mail # user]
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...HI guys : I have an EMR job which seems to be loading "old" versions of an aws-sdk-java jar. I looked closer and found that the hadoop nodes im using in fact have a old version o...
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Author: Jay Vyas,
2012-07-27, 04:07
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Simply reading small a hadoop text file. - Hadoop - [mail # user]
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...Hi guys : Whats the idiomatic way to iterate through the k/v pairs in a text file ? been playing with almost everything everything with SequenceFiles and almost forgot :) my text outpu...
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Author: Jay Vyas,
2012-07-14, 00:30
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fixing the java / unixPrincipal hadoop error... Ubuntu. - Hadoop - [mail # user]
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...Hi guys : I run into the following roadblock in my VM - and Im not sure what the right way to install sun java is. Any suggestions? In particular, the question is best described here: ...
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Author: Jay Vyas,
2012-07-08, 21:48
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