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Re: Thinking ahead to hadoop-2.6 - MapReduce - [mail # dev]
...Just to give a quick update about the current status of HDFS-6584 (archivalstorage). So far after HDFS-7081 got committed this morning, the mainfunctionalities have already been finished. As...
   Author: Jing Zhao, 2014-09-25, 01:19
[MAPREDUCE-5899] Support incremental data copy in DistCp - MapReduce - [issue]
...Currently when doing distcp with -update option, for two files with the same file names but with different file length or checksum, we overwrite the whole file. It will be good if we can det...
http://issues.apache.org/jira/browse/MAPREDUCE-5899    Author: Jing Zhao, 2014-08-15, 06:47
Re: Hadoop 2 Namenode HA not working properly - MapReduce - [mail # user]
...Hi Bruno,      Could you post your configuration? Also, when you killed one of the NN, you mean only killing the NN process or you shutdown the whole machine?  Thanks, -J...
   Author: Jing Zhao, 2014-01-20, 18:44
Re: HDFS authentication - MapReduce - [mail # user]
...You can setup Kerberos for HDFS or even the whole Hadoop. The link http://docs.hortonworks.com/HDPDocuments/HDP2/HDP- contains deta...
   Author: Jing Zhao, 2014-01-10, 18:20
Re: high availability - MapReduce - [mail # user]
..."it is unclear to me if the transition in this case is also rapid but the fencing takes long while the new namenode is already active, or if in this period i am stuck without an active namen...
   Author: Jing Zhao, 2013-10-15, 04:38
Re: hadoop 2.0.5 datanode heartbeat issue - MapReduce - [mail # user]
...You may need to make sure the configuration of your DN has also been updated for HA. If your DN's configuration still uses the old URL (e.g., one of your NN's host+port) for "fs.defaultFS", ...
   Author: Jing Zhao, 2013-08-30, 18:23
Re: Hadoop HA error "JOURNAL is not supported in state standby" - MapReduce - [mail # user]
...Looks like you have some incompatibility between your client side and the server side? Are you also running 2.0.5 in your client side?  As Harsh mentioned, the NN side warning msg is no...
   Author: Jing Zhao, 2013-08-29, 20:40
Re: Eclipse plugin - MapReduce - [mail # user]
...Hi Bharati,      Usually you only need to run "ant clean jar jar-test" and "ant eclipse" on your code base, and then import the project into your eclipse. Can you provide some...
   Author: Jing Zhao, 2013-05-22, 21:42
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