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Re: hdfs question when replacing dead node... - Hadoop - [mail # user]
...How fast did you re-run fsck after re-joining the node? fsck returns data based on the latest block reports from datanodes -- these are scheduled to run (I think) every 15 minutes, so the Na...
   Author: Aaron Kimball, 2009-07-24, 02:21
Re: Remote access to cluster using user as hadoop - Hadoop - [mail # user]
...The current best practice is to firewall off your cluster, configure a SOCKS proxy/gateway, and only allow traffic to the cluster from the gateway. Being able to SSH into the gateway provide...
   Author: Aaron Kimball, 2009-07-23, 16:17
[expand - 2 more] - Re: Testing Mappers in Hadoop 0.20.0 - Hadoop - [mail # user]
...+CC mapred-dev  Hm.. Making this change is actually really difficult.  After changing Mapper.java, I understand why this was made a non-static member.  By making Context non-s...
   Author: Aaron Kimball, 2009-07-23, 03:17
Re: Eclipse plugin for Hadoop Pipes? - Hadoop - [mail # user]
...If there is one, it's not contributed back to the public project. My guess is probably not :( - Aaron  On Wed, Jul 22, 2009 at 10:00 AM, Alberto Luengo Cabanillas wrote: ing...
   Author: Aaron Kimball, 2009-07-22, 23:54
Re: native-lzo library not available issue with terasort - Hadoop - [mail # user]
...Native LZO support was removed from Hadoop due to licensing restrictions. See http://www.cloudera.com/blog/2009/06/24/parallel-lzo-splittable-compression -for-hadoop/ for a writeup on how to...
   Author: Aaron Kimball, 2009-07-22, 02:09
[expand - 1 more] - Re: datanode auto down - Hadoop - [mail # user]
...I'd say that this is your problem right here:  Heap Size is 972.5 MB / 972.5 MB (100%)  As suspected, your very small block size + many files has completely filled the NameNode hea...
   Author: Aaron Kimball, 2009-07-22, 02:07
Re: Hadoop logging - Hadoop - [mail # user]
...Hm. What version of Hadoop are you running? Have you modified the log4j.properties file in other ways?  The logfiles generated by Hadoop should, by default, switch to a new file every d...
   Author: Aaron Kimball, 2009-07-22, 02:01
Re: Question on setting a new user variable with JobConf - Hadoop - [mail # user]
...And regarding your desire to set things on the command line: If your program implements Tool and is launched via ToolRunner, you can specify "-D myparam=myvalue" on the command line and it'l...
   Author: Aaron Kimball, 2009-07-22, 01:55
Re: Can't compile the example WordCount.java - Hadoop - [mail # user]
...What happens if you recompile with -verbose? Can you paste the output here? - Aaron  On Sat, Jul 18, 2009 at 9:34 PM, Richard Bowser wrote:  ...
   Author: Aaron Kimball, 2009-07-21, 00:17
Re: Running parallel jobs having the same output directory - Hadoop - [mail # user]
...There's likely another gotcha regarding the fact that various logs and job config files are written to the _logs directory under the output directory. You'd need to uniquify that as well. Th...
   Author: Aaron Kimball, 2009-07-21, 00:02
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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