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Re: Hadoop C++ HDFS test running Exception - MapReduce - [mail # user]
...I've found in past that the native code runtime somehow doesn't support wildcarded classpaths. If you add the jars explicitly to the CLASSPATH, your app will work. You could use a simple she...
   Author: Harsh J, 2014-01-14, 02:39
Re: Error in starting DFS - message says JAVA_HOME not set though the workstation has working java - MapReduce - [mail # user]
...You'll need to set JAVA_HOME under the $HADOOP_CONF_DIR/hadoop-env.sh explicitly. This variable is not a system global one.  On Fri, Jan 10, 2014 at 7:17 AM, srinivas  wrote:  ...
   Author: Harsh J, 2014-01-10, 04:22
Re: Wordcount Hadoop pipes C++ Running issue - MapReduce - [mail # user]
...Hello,  Do you have a proper MR cluster configured? Does your hadoop-1.2.1/bin/conf/mapred-site.xml point mapred.job.tracker to a specific hostname and port, and a JT+TT is running? &nb...
   Author: Harsh J, 2014-01-10, 02:17
Re: Block size - MapReduce - [mail # user]
...XG,  The newer default is 128 MB [HDFS-4053]. The minimum, however, can be as low as io.bytes.per.checksum (default: 512 bytes) if the user so wishes it. To administratively set a limit...
   Author: Harsh J, 2014-01-04, 07:23
Re: Reduce task hang[EMERGENCE] - MapReduce - [mail # user]
...Hi again,  I did not mention the TaskTracker log, but the actual Task JVM's syslog/stderr/stdout. Do those log *any* problems at all?  On Fri, Jan 3, 2014 at 11:16 AM, Azuryy Yu &n...
   Author: Harsh J, 2014-01-03, 05:59
[MAPREDUCE-5492] Suppress expected log output stated on MAPREDUCE-5 - MapReduce - [issue]
...Jetty in MR1 may produce an expected EOFException during its operation that we shouldn't log out in ERROR form.This shouldn't affect MR2, however, as it uses Netty.See MAPREDUCE-5 (Jothi's c...
http://issues.apache.org/jira/browse/MAPREDUCE-5492    Author: Harsh J, 2014-01-03, 04:19
Re: Job fails while re attempting the task in multiple outputs case - MapReduce - [mail # user]
...Are you using the MultipleOutputs class shipped with Apache Hadoop or one of your own?  If its the latter, please take a look at gotchas to take care of described at http://wiki.apache....
   Author: Harsh J, 2013-12-30, 14:12
Re: conf.set() and conf.get() - MapReduce - [mail # user]
...If you can store your object in a string format, you should be able to use Configuration to do so, and I would advise using serialised files via DistributedCache if it is larger in size, suc...
   Author: Harsh J, 2013-12-30, 05:46
Re: issue about corrupt block test - MapReduce - [mail # user]
...Your find expression includes the genstamp, try it without the genstamp:  find /data -name 'blk_-5451264646515882190*'  On Wed, Dec 11, 2013 at 2:46 PM, ch huang  wrote:  ...
   Author: Harsh J, 2013-12-11, 09:36
Re: about hadoop-2.2.0 "mapred.child.java.opts" - MapReduce - [mail # user]
...Actually, its the other way around (thanks Sandy for catching this error in my post). The presence of mapreduce.map|reduce.java.opts overrides mapred.child.java.opts, not the other way round...
   Author: Harsh J, 2013-12-04, 08:20
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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