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Re: executing hadoop commands from python? - HDFS - [mail # user]
...Instead of 'scraping' this way, consider using a library such as Pydoop (http://pydoop.sourceforge.net) which provides pythonic ways and APIs to interact with Hadoop components. There are al...
   Author: Harsh J, 2013-02-17, 14:09
Re: QJM deployment - HDFS - [mail # user]
...Hi Azuryy,  Thanks for your feedback on the docs! I've filed https://issues.apache.org/jira/browse/HDFS-4508 on your behalf to address them. Feel free to file JIRA with documentation co...
   Author: Harsh J, 2013-02-17, 13:24
Re: building from subversion repository - HDFS - [mail # user]
...Hi George,  The error below is your issue:   To build trunk, a protocol buffers (protobuf) compiler installation of version 2.4 at least is required, cause we have that as a depend...
   Author: Harsh J, 2013-02-17, 13:17
Re: How can I limit reducers to one-per-node? - HDFS - [mail # user]
...The suggestion to add a combiner is to help reduce the shuffle load (and perhaps, reduce # of reducers needed?), but it doesn't affect scheduling of a set number of reduce tasks nor does a s...
   Author: Harsh J, 2013-02-11, 05:48
Re: Secondary Sort example error - HDFS - [mail # user]
...The JIRA https://issues.apache.org/jira/browse/MAPREDUCE-2584 should help such cases, if what I speculated above is indeed the case.  On Fri, Feb 8, 2013 at 12:16 AM, Harsh J  wrot...
   Author: Harsh J, 2013-02-07, 18:49
[HDFS-4277] SocketTimeoutExceptions over the DataXciever service of a DN should print the DFSClient ID - HDFS - [issue]
...Currently, when one faces a SocketTimeoutExceptions (or any exception rather, in a DN log, for a client <-> DN interaction), we fail to print the DFSClient ID. This makes it untraceabl...
http://issues.apache.org/jira/browse/HDFS-4277    Author: Harsh J, 2013-02-07, 00:05
Re: Apache Development Snapshot Repository does not work - HDFS - [mail # user]
...Are you trying to build a specific submodule here, i.e, under what checked out directory are you running the "mvn install" under? I'd recommend running it under the root of the checkout (the...
   Author: Harsh J, 2013-02-01, 19:10
Re: How to find Blacklisted Nodes via cli. - HDFS - [mail # user]
...There isn't a concept of 'blacklist' in HDFS, it exists only in MapReduce (MR1) and YARN.  Dead Nodes (and those that have been excluded) are reported via "hdfs dfsadmin -report" as ind...
   Author: Harsh J, 2013-01-31, 14:02
[HDFS-4259] Improve pipeline DN replacement failure message - HDFS - [issue]
...The current message shown is something such as below:Failed to add a datanode. User may turn off this feature by setting X.policy in configuration, where the current policy is Y. (Nodes: cur...
http://issues.apache.org/jira/browse/HDFS-4259    Author: Harsh J, 2013-01-28, 13:21
Re: reg max map task config - HDFS - [mail # user]
...Hi,  As noted on http://hadoop.apache.org/docs/stable/cluster_setup.html#Configuring+the+Hadoop+Daemons, and by its own name, the config 'mapred.tasktracker.map.tasks.maximum' applies t...
   Author: Harsh J, 2013-01-28, 05:20
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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