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[MAPREDUCE-5402] DynamicInputFormat should allow overriding of MAX_CHUNKS_TOLERABLE - MapReduce - [issue]
...In MAPREDUCE-2765, which provided the design spec for DistCpV2, the author describes the implementation of DynamicInputFormat, with one of the main motivations cited being to reduce the chan...
http://issues.apache.org/jira/browse/MAPREDUCE-5402    Author: David Rosenstrauch, 2014-08-15, 06:47
[MAPREDUCE-5549] distcp app should fail if m/r job fails - MapReduce - [issue]
...I run distcpv2 in a scripted manner.  The script checks if the distcp step fails and, if so, aborts the rest of the script.  However, I ran into an issue today where the distcp job...
http://issues.apache.org/jira/browse/MAPREDUCE-5549    Author: David Rosenstrauch, 2014-07-08, 03:47
Inconsistent results when reading from s3n - MapReduce - [mail # user]
...Ran into a puzzling - and worrisome - issue late last night.  I was running a Hadoop streaming job, which reads input from 2 different  buckets in Amazon S3 (using s3n://).  W...
   Author: David Rosenstrauch, 2013-05-07, 21:06
Re: Combine data from different HDFS FS - MapReduce - [mail # user]
...I don't think you need a special input format.  I think you just need to  specify your list of input files like this:  hdfs://HOST1/folder-name/file-name,hdfs://HOST2/folder-n...
   Author: David Rosenstrauch, 2013-04-09, 13:37
Distcp reliability issue - MapReduce - [mail # user]
...I've run into an issue with the reliability of distcp.  Specifically, I  have a distcp job that seems to have not copied over a few files - and  yet didn't fail the job.  ...
   Author: David Rosenstrauch, 2013-02-28, 06:12
Re: Large static structures in M/R heap - MapReduce - [mail # user]
...On 02/27/2013 01:42 PM, Adam Phelps wrote:  We use a similar solution to what you suggested to address this issue.  Though, the in-memory app we run on each datanode is a proprieta...
   Author: David Rosenstrauch, 2013-02-27, 18:53
[MAPREDUCE-2293] Enhance MultipleOutputs to allow additional characters in the named output name - MapReduce - [issue]
...Currently you are only allowed to use alpha-numeric characters in a named output name in the MultipleOutputs class.  This is a bit of an onerous restriction, as it would be extremely co...
http://issues.apache.org/jira/browse/MAPREDUCE-2293    Author: David Rosenstrauch, 2013-01-27, 17:47
[expand - 1 more] - Re: How do find the version of Hadoop inside a running Map or reduce task - MapReduce - [mail # user]
...On 11/05/2012 04:02 PM, David Rosenstrauch wrote:  Sorry, make that "hadoop version".  Also, FYI, it looks like that command just calls out to methods in  http://hadoop.apache...
   Author: David Rosenstrauch, 2012-11-05, 21:08
[MAPREDUCE-2001] Enhancement to SequenceFileOutputFormat to allow user to set MetaData - MapReduce - [issue]
...The org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat class currently does not provide a way for the user to pass in a MetaData object to be written to the SequenceFile.Current...
http://issues.apache.org/jira/browse/MAPREDUCE-2001    Author: David Rosenstrauch, 2012-10-17, 05:01
Re: Task Attempt Failed - MapReduce - [mail # user]
...I get those too.  It's probably this issue:  https://issues.apache.org/jira/browse/MAPREDUCE-2374  If you go look in the task tracker log on the node that had the failed  ...
   Author: David Rosenstrauch, 2012-10-08, 14:31
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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