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Re: Sqoop installation? - Hadoop - [mail # user]
...Transferring to user list (hdfs-dev bcc'd).  Hi Kevin,  The datanodes are definitely more disposable than the namenodes.  If a Sqoop command unexpectedly consumes a lot of res...
   Author: Chris Nauroth, 2013-04-23, 17:03
Re: How to understand Hadoop source code ? - Hadoop - [mail # dev]
...Is there a specific bug fix or feature that you are trying to contribute?  Specific questions like "how can I help with jira X?" or "what is the main entry point when I run the hdfs com...
   Author: Chris Nauroth, 2013-04-18, 17:14
Re: [VOTE] Release Apache Hadoop 2.0.4-alpha - Hadoop - [mail # dev]
...+1 (non-binding)  - downloaded binary tarball - verified signatures and checksums - deployed to 3 Ubuntu VMs: 1xNN, 1xRM, 2xDN, 2xNM, 1x2NN - tested multiple HDFS operations - ran wordc...
   Author: Chris Nauroth, 2013-04-17, 16:52
Re: [VOTE] Release Apache Hadoop 0.23.7 - Hadoop - [mail # dev]
...+1 (non-binding)  - downloaded binary tarball - verified signatures and checksums - deployed to 3 Ubuntu VMs: 1xNN, 1xRM, 2xDN, 2xNM, 1x2NN - tested multiple HDFS operations - ran wordc...
   Author: Chris Nauroth, 2013-04-17, 16:32
Re: How to run hadoop jar command in a clustered environment - Hadoop - [mail # dev]
...Hello Thoihen,  I'm moving this discussion from common-dev (questions about developing Hadoop) to user (questions about using Hadoop).  If you haven't already seen it, then I recom...
   Author: Chris Nauroth, 2013-04-15, 17:32
Re: Maven build YARN ResourceManager only - Hadoop - [mail # user]
...I don't have an answer to your exact question, but I do have a different suggestion that prevents the need to do frequent rebuilds of the whole Hadoop source tree.  First, do a full bui...
   Author: Chris Nauroth, 2013-04-13, 04:41
[expand - 1 more] - Re: Which java code(file) generates the heartbeat from the datanode and which code(file) listen that heartbeat on the namenode? - Hadoop - [mail # dev]
...No problem.  Glad to help.  :-)  In the last email, I mentioned the sendHeartbeat method in NameNodeRpcServer.java.  This is the method that handles receiving a heartbeat...
   Author: Chris Nauroth, 2013-04-12, 21:17
[HADOOP-9312] JniBasedUnixGroupsMapping#getGroupForUser can potentially leak memory - Hadoop - [issue]
...This method lazily initializes a static variable to contain an empty array of groups.  If multiple threads call the method before the variable has been initialized, then there is potent...
http://issues.apache.org/jira/browse/HADOOP-9312    Author: Chris Nauroth, 2013-03-28, 16:21
[HADOOP-9390] Tests fail when run as root/Administrator. - Hadoop - [issue]
...There is at least one test, TestDiskChecker, that fails when running as root on Linux or Administrator on Windows.  The test assumes that setting file permissions can make a file inacce...
http://issues.apache.org/jira/browse/HADOOP-9390    Author: Chris Nauroth, 2013-03-16, 20:54
[HADOOP-9271] revert Python build scripts from branch-trunk-win - Hadoop - [issue]
...On branch-trunk-win, some work was committed to convert custom build scripting to Python as a cross-platform solution to support builds on both Linux and Windows.  The community has sin...
http://issues.apache.org/jira/browse/HADOOP-9271    Author: Chris Nauroth, 2013-03-13, 20:19
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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