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Re: simple hadoop MR program to be executed using java - Hadoop - [mail # user]
...Hello Rab,There is actually quite a lot of logic in the "hadoop jar" shell scripts toset up the classpath (including Hadoop configuration file locations) andset up extra arguments (like heap...
   Author: Chris Nauroth, 2015-01-16, 19:05
Re: InterfaceStability and InterfaceAudience stability - Hadoop - [mail # dev]
...Would it really be backwards-incompatible if we added new levels later?That seems counter-intuitive and contrary to this piece of documentation:http://docs.oracle.com/javase/specs/jls/se7/ht...
   Author: Chris Nauroth, 2015-01-15, 19:27
Re: Namenode HA and data loss - Hadoop - [mail # user]
...Yes, if this is an HDFS cluster deployed with HA using the Quorum JournalManager, then it is protected against data loss.  This documentation pagedescribes the configuration and how the...
   Author: Chris Nauroth, 2015-01-13, 23:19
Re: additional command at step 4, executing Hadoop - Hadoop - [mail # user]
...Hello Hylson,Thank you for the offer to contribute a documentation improvement.I'd expect this to work without explicitly running mkdir first.  In fact,creating the directory first yiel...
   Author: Chris Nauroth, 2015-01-12, 18:03
[HADOOP-11464] Reinstate support for launching Hadoop processes on Windows using Cygwin. - Hadoop - [issue]
...The Windows compatibility work removed the dependency on Cygwin as a compatibility layer.  However, some users may still wish to run Cygwin on a personal machine for running Hadoop comm...
http://issues.apache.org/jira/browse/HADOOP-11464    Author: Chris Nauroth, 2015-01-10, 15:27
Re: Running spark 1.2 on Hadoop + Kerberos - Hadoop - [mail # user]
...This kind of error could happen in an HDFS HA deployment if the client isconnecting to a NameNode that happens to be the standby at the momentinstead of the active, and the client is not con...
   Author: Chris Nauroth, 2015-01-09, 18:55
Re: HA Hadoop journal nodes configuration - Hadoop - [mail # user]
...Another source of information is the Apache documentation on highavailability with QJM:http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.htmlTh...
   Author: Chris Nauroth, 2015-01-08, 23:04
[HADOOP-10903] Enhance hadoop classpath command to expand wildcards or write classpath into jar manifest. - Hadoop - [issue]
...The "hadoop classpath" shell command currently prints the classpath variable established by the shell scripts and then exits.  A few enhancements to this command would be desirable to s...
http://issues.apache.org/jira/browse/HADOOP-10903    Author: Chris Nauroth, 2015-01-08, 00:55
Re: Putting multiple files.. - Hadoop - [mail # user]
...Also, bash wildcard expansion should automatically put the full list ofmatching files into the list of local source arguments prior to execution.For example, assuming 3 files named hello1, h...
   Author: Chris Nauroth, 2015-01-07, 23:45
Re: error using MiniDFSCluster in windows - Hadoop - [mail # user]
...Hi Yogendra,This is something that I had fixed as part of HDFS-573.https://issues.apache.org/jira/browse/HDFS-573The relevant portion of hadoop-hdfs-project/hadoop-hdfs/pom.xml is here,where...
   Author: Chris Nauroth, 2015-01-07, 23:37
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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