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Re: some questions about HA and secondary name node - HDFS - [mail # user]
...Hi,  On Wed, Jul 31, 2013 at 7:03 AM, ch huang  wrote:  With HA setup, you do not need to run the SecondaryNameNode daemon.   The Standby state NameNode automatically beh...
   Author: Harsh J, 2013-07-31, 02:18
Re: Suspecting Namenode Filesystem Corrupt!! - HDFS - [mail # user]
...What do you mean by you "can't get back a result"? The command hangs, errors out, gives an incorrect result, what does it do? Can you post your error please? On Jul 30, 2013 1:31 AM, "Sathis...
   Author: Harsh J, 2013-07-30, 02:42
Re: Error on running a hadoop job - HDFS - [mail # user]
...You could see this if you had removed away /wordcount_raw/ when the reducer was running perhaps. Otherwise the path had an attempt ID so am not seeing how it could have had two writers confl...
   Author: Harsh J, 2013-07-29, 18:19
Re: problem about starting datanode - HDFS - [mail # user]
...You have one datanode data volume (dfs.datanode.data.dir) configured, but you've specified tolerated failures as 3. The state of 3 > 1 is invalid and hence the error. You cannot enable di...
   Author: Harsh J, 2013-07-26, 05:48
Re: issure about create fence method - HDFS - [mail # user]
...The fencing happens at the NameNodes, so I guess just on the two NNs should suffice.  On Fri, Jul 26, 2013 at 6:26 AM, ch huang  wrote:    Harsh J...
   Author: Harsh J, 2013-07-26, 03:02
Re: issure about config namenode HA - HDFS - [mail # user]
...If you have already configured QJM for NN's edits storage, then yes, it needs to be available.  On Fri, Jul 26, 2013 at 8:24 AM, ch huang  wrote:    Harsh J...
   Author: Harsh J, 2013-07-26, 03:00
[HDFS-3302] Review and improve HDFS trash documentation - HDFS - [issue]
...Improve Trash documentation for users.(0.23 published release docs are missing original HDFS docs btw...)A set of FAQ-like questions can be found on HDFS-2740I'll update the ticket shortly w...
http://issues.apache.org/jira/browse/HDFS-3302    Author: Harsh J, 2013-07-25, 21:37
Re: Get the tree structure of a HDFS dir, similar to dir/files - HDFS - [mail # user]
...The FileSystem interface provides a recursive option for this. See http://hadoop.apache.org/docs/current/api/org/apache/hadoop/fs/FileSystem.html#listFiles(org.apache.hadoop.fs.Path,%20boole...
   Author: Harsh J, 2013-07-24, 05:24
Re: Two simple question about hadoop 2 - HDFS - [mail # user]
...Hi,  On Mon, Jul 22, 2013 at 7:26 AM, Yexi Jiang  wrote:  No fixed date yet, but probably later this year. There is a formal beta that should release soon (2.1.0-beta), which ...
   Author: Harsh J, 2013-07-22, 05:54
[HDFS-4278] Log an ERROR when DFS_BLOCK_ACCESS_TOKEN_ENABLE config  is disabled but security is turned on. - HDFS - [issue]
...When enabling security, one has to manually enable the config DFS_BLOCK_ACCESS_TOKEN_ENABLE (dfs.block.access.token.enable). Since these two are coupled, we could make it turn itself on auto...
http://issues.apache.org/jira/browse/HDFS-4278    Author: Harsh J, 2013-07-19, 08:45
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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