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Re: reg pig issue - Hadoop - [mail # user]
...Hi mallik,You miss ":" between fieldname and field type, it should be    date_d : chararrayOn Mon, Oct 20, 2014 at 12:50 PM, mallik arjun wrote:Best RegardsJeff Zhang ...
   Author: Jeff Zhang, 2014-10-20, 06:26
Re: Spark vs Tez - Hadoop - [mail # user]
...Tez has a feature called pre-warm which will launch JVM before you use itand you can reuse the container afterwards. So it is also suitable forinteractive queries and is more stable and scal...
   Author: Jeff Zhang, 2014-10-19, 01:07
[HADOOP-10909] Add more documents about command "daemonlog" - Hadoop - [issue]
...In the current document, it does not explain the argument "name" means. People without java knowledge would think it as process name, such as NameNode or DataNode, but actually it is class n...
http://issues.apache.org/jira/browse/HADOOP-10909    Author: Jeff Zhang, 2014-07-30, 22:50
[expand - 1 more] - Re: SIMPLE authentication is not enabled. Available:[TOKEN] - Hadoop - [mail # user]
...Here's my sample for your reference  ( If you are running unmanaged AM inclient side):1.  set token in UserGroupInformation2.  do the registration in the way of UserGroupInfor...
   Author: Jeff Zhang, 2014-03-16, 12:45
Re: Using resource manager as standalone component from hadoop yarn - Hadoop - [mail # user]
...You can start the resource manager without starting any node manager.  Andthe source code of resource manager and node manager are in different subpom project.On Wed, Mar 12, 2014 at 7:...
   Author: Jeff Zhang, 2014-03-12, 00:44
Re: Impact of Tez/Spark to MapReduce - Hadoop - [mail # user]
...I believe in the future the spark functional style api will dominate thebig data world. Very few people will use the native mapreduce API. Even nowusually users use third-party mapreduce lib...
   Author: Jeff Zhang, 2014-03-06, 01:48
[expand - 1 more] - Re: Question on the UnManaged-AM-Launcher - Hadoop - [mail # user]
...I guess I got the answer , the reason is that we need to pass theenvironment to AM, and there's no way to pass that to thread, but it ispossible for process.  Could anyone confirm that ...
   Author: Jeff Zhang, 2014-02-26, 09:36
Re: Logic of isSplittable() of class FileInputFormat - Hadoop - [mail # user]
...Hi Sugandha,Take gz file as an example, It is not splittable because of the compressionalgorithm it is used.  It can not guarantee that one record is located inone block, if one record ...
   Author: Jeff Zhang, 2014-02-26, 08:37
Unmanaged application issue on YARN - Hadoop - [mail # user]
...Hi all,I build an ummanaged application and submit it to yarn ( hadoop 2.2). Butencounter the following exception:Caused by:org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.A...
   Author: Jeff Zhang, 2014-02-26, 05:38
[expand - 1 more] - Re: question about hadoop dfs - Hadoop - [mail # user]
...you can use the fsck command to find the block locations, here's one examplehadoop fsck /user/hadoop/graph_data.txt -blocks -locations -filesOn Sun, Jan 26, 2014 at 2:48 PM, EdwardKing  ...
   Author: Jeff Zhang, 2014-01-28, 02:10
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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