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Re: Code example of Simple Authenication using Hadoop - HDFS - [mail # dev]
...Hello Rahul,Hadoop processes, including the map and reduce tasks of a MapReduce job,handle Kerberos authentication transparently after the user submitting thejob runs kinit to obtain a ticke...
   Author: Chris Nauroth, 2015-02-23, 18:55
[HDFS-7714] Simultaneous restart of HA NameNodes and DataNode can cause DataNode to register successfully with only one NameNode. - HDFS - [issue]
...In an HA deployment, DataNodes must register with both NameNodes and send periodic heartbeats and block reports to both.  However, if NameNodes and DataNodes are restarted simultaneousl...
http://issues.apache.org/jira/browse/HDFS-7714    Author: Chris Nauroth, 2015-02-17, 08:12
[HDFS-4919] Improve documentation of dfs.permissions.enabled flag. - HDFS - [issue]
...The description of dfs.permissions.enabled in hdfs-default.xml does not state that permissions are always checked on certain calls regardless of this configuration.  The HDFS permission...
http://issues.apache.org/jira/browse/HDFS-4919    Author: Chris Nauroth, 2015-02-05, 01:44
[HDFS-7632] MiniDFSCluster configures DataNode data directories incorrectly if using more than 1 DataNode and more than 2 storage locations per DataNode. - HDFS - [issue]
...MiniDFSCluster allows the caller to set the number of storage locations per DataNode.  If this number is set higher than 2, and if the cluster is configured with more than 1 DataNode, t...
http://issues.apache.org/jira/browse/HDFS-7632    Author: Chris Nauroth, 2015-01-17, 15:41
[HDFS-7635] Remove TestCorruptFilesJsp from branch-2. - HDFS - [issue]
...HDFS-6252 removed corrupt_files.jsp, but there is still a test suite named TestCorruptFilesJsp in branch-2.  The tests attempt to call corrupt_files.jsp and fail on an HTTP 404 error re...
http://issues.apache.org/jira/browse/HDFS-7635    Author: Chris Nauroth, 2015-01-17, 15:41
[HDFS-7636] Support sorting by columns in the Datanode Information tables of the NameNode web UI. - HDFS - [issue]
...During discussion of HDFS-7604, we mentioned that it would be nice to be able to sort the Datanode Information tables by count of Failed Volumes.  This issue proposes to implement sorti...
http://issues.apache.org/jira/browse/HDFS-7636    Author: Chris Nauroth, 2015-01-16, 19:17
[HDFS-7591] hdfs classpath command should support same options as hadoop classpath. - HDFS - [issue]
...HADOOP-10903 enhanced the hadoop classpath command to support optional expansion of the wildcards and bundling the classpath into a jar file containing a manifest with the Class-Path attribu...
http://issues.apache.org/jira/browse/HDFS-7591    Author: Chris Nauroth, 2015-01-16, 17:40
Re: Getting a list of all StorageInfo - HDFS - [mail # dev]
...Hi Youssef,You might want to review the code for BlockPlacementPolicyDefault to get asense for how an implementation works.  Perhaps you could even start yourown work by copying and mod...
   Author: Chris Nauroth, 2015-01-07, 21:22
[HDFS-5620] NameNode: implement Global ACL Set as a memory optimization. - HDFS - [issue]
...The AclManager can maintain a Global ACL Set to store all distinct ACLs in use by the file system.  All inodes that have the same ACL entries can share the same ACL instance....
http://issues.apache.org/jira/browse/HDFS-5620    Author: Chris Nauroth, 2014-12-05, 19:09
Re: Clarification related to ACL with setPermission - HDFS - [mail # dev]
...Hi Vinay,The behavior you described is correct according to the POSIX ACL model.The reason for this is that once a file has an ACL, its group permissionbits are then used as the mask entry, ...
   Author: Chris Nauroth, 2014-11-25, 22:16
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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