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Re: Hadoop 2.0.0 stopping itself - Hadoop - [mail # user]
...The general@ mailing list is NOT for end-user questions anddiscussion. Please use the [EMAIL PROTECTED] mailing list forsuch issues.Please also read http://hadoop.apache.org/mailing_lists.ht...
   Author: Harsh J, 2014-09-03, 11:03
Re: cannot start tasktracker because java.lang.NullPointerException - Hadoop - [mail # user]
...It appears you have made changes to the source and recompiled it. Theactual release source line 247 of the failing class can be seen athttps://github.com/apache/hadoop-common/blob/release-1....
   Author: Harsh J, 2014-09-01, 15:15
Re: Hadoop HDFS slow after upgrade vom 0.20 -> to 2.0 - Hadoop - [mail # user]
...Hi Norbert,Can you check the DN daemon's GC activity (you can look for theJvmPauseMonitor messages in logs too, in 4.7)? Is it increased frompre-upgrade, or generally seems high to you? What...
   Author: Harsh J, 2014-08-19, 13:33
Re: Don't want to read during namenode is in safemode - Hadoop - [mail # user]
...You can use org.apache.hadoop.hdfs.DistributedFileSystem#isInSafeMode()API call to check if the NameNode is in safe-mode. It returns a simpleboolean result.On Fri, Aug 15, 2014 at 10:26 PM, ...
   Author: Harsh J, 2014-08-16, 04:28
[expand - 1 more] - RE: hadoop/yarn and task parallelization on non-hdfs filesystems - Hadoop - [mail # user]
...The split configurations in FIF mentioned earlier would work for localfiles as well. They aren't deemed unsplitable, just considered as onesingle block.If the FS in use has its advantages it...
   Author: Harsh J, 2014-08-15, 16:15
Re: Hadoop 2.2 Built-in Counters - Hadoop - [mail # user]
...You can see them in the MR Job HistoryServer UI if you have oneconfigured. You can find config properties and launch command inhttp://hadoop.apache.org/docs/stable2/hadoop-project-dist/hadoo...
   Author: Harsh J, 2014-08-14, 07:27
[HADOOP-9567] Provide auto-renewal for keytab based logins - Hadoop - [issue]
...We do a renewal for cached tickets (obtained via kinit before using a Hadoop application) but we explicitly seem to avoid doing a renewal for keytab based logins (done from within the client...
http://issues.apache.org/jira/browse/HADOOP-9567    Author: Harsh J, 2014-08-07, 17:51
[expand - 1 more] - Re: Ideal number of mappers and reducers to increase performance - Hadoop - [mail # user]
...Felix has already explained most of the characteristics that definethe parallelism of MR jobs.How many mappers does your program run? Your parallel performancedepends on how much parallelism...
   Author: Harsh J, 2014-08-07, 10:37
[HADOOP-8027] Visiting /jmx on the daemon web interfaces may print unnecessary error in logs - Hadoop - [issue]
...Logs that follow a /jmx servlet visit:11/11/22 12:09:52 ERROR jmx.JMXJsonServlet: getting attribute UsageThreshold of java.lang:type=MemoryPool,name=Par Eden Space threw an exceptionjavax.ma...
http://issues.apache.org/jira/browse/HADOOP-8027    Author: Harsh J, 2014-08-07, 05:12
Re: Hadoop 2.4.0 How to change "Configured Capacity" - Hadoop - [mail # user]
...You will need to set them up in the hdfs-site.xml.P.s. Their default is present in the hdfs-default.xml you linked to:http://hadoop.apache.org/docs/r2.4.1/hadoop-project-dist/hadoop-hdfs/hdf...
   Author: Harsh J, 2014-08-02, 11:53
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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