About pmj

m_basavaraj · ‎10-21-2017

ORC is best option with in hive and Parquet is best option across Hadoop ecosystem.

kabadou_rawia · ‎09-25-2017

@PJ Thank you for your reply.

Shelton · ‎09-19-2017

@PJ Okay good to know enjoy

ramya · ‎09-18-2017

@PJ You can also look at the .out files which are present in the same yarn log dir location. Alternatively, you can launch the process in the foreground using "yarn nodemanager" CLI to see why the process is shutting down immediately.

mqureshi · ‎07-25-2017

@PJ These directories exists on journal nodes if that's what you are using or whatever disk you will specify in ambari for namenode when you do your install. I think you will find the following link helpful. https://hortonworks.com/blog/hdfs-metadata-directories-explained/

ekoifman · ‎07-10-2017

ACID in Hive is enabled globally and per table. There is no such thing as enabling it per job. Existing queries will not be affected if they started before ACID was enabled.

pardeep_kumar · ‎06-27-2017

Well there are many disadvantages of using replication factor 1 and we strongly do not recommend it for below reasons: 1. Data loss --> One or more datanode or disk failure will result in data loss. 2. Performance issues --> Having replication factor of more than 1 results in more parallelization. 3. Handling Failure --> With replication factor > 1, one or more Datanode doesn't result in job failure.

nshelke · ‎05-31-2017

@PJ This might be problem of your network, due to which heartbeat is interrupting. You can decommission it and commission it back one by one.

adib_elaraki · ‎05-19-2017

hi @Sonu Sahi, i've added nifi as a service in my HDP 2.6, but i'm having some difficulties to connect it to cassandra which is installed on my linux host. I'm wondering if i have to install cassandra in my sandbox too? Can you please take a look here for more details: https://community.hortonworks.com/questions/103622/how-to-use-querycassandra.html

MindGlass · ‎05-11-2017

1. Run this command as hdfs user. hdfs fsck / 2. If you return CORRUPT files, then try it below command. hdfs fsck -list-corruptfileblocks hdfs fsck $hdfsfilepath -location -blocks -files hdfs fsck -delete $corrupt_files_path 3. Complete above procedure, and re-run 1. command. hdfs fsck /

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Cloudera Community

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