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[HDFS-7456] De-duplicate AclFeature instances with same AclEntries do reduce memory footprint of NameNode - HDFS - [issue]
...As discussed  in HDFS-7454 here, de-duplication of AclFeature helps in reducing the memory footprint of the namenode....
http://issues.apache.org/jira/browse/HDFS-7456    Author: Vinayakumar B, 2014-12-17, 05:04
[HDFS-6440] Support more than 2 NameNodes - HDFS - [issue]
...Most of the work is already done to support more than 2 NameNodes (one active, one standby). This would be the last bit to support running multiple standby NameNodes; one of the standbys sho...
http://issues.apache.org/jira/browse/HDFS-6440    Author: Jesse Yates, 2014-12-17, 00:26
[HDFS-7537] dfs.namenode.replication.min > 1 && missing replicas && NN restart is confusing - HDFS - [issue]
...If minimum replication is set to 2 or higher and some of those replicas are missing and the namenode restarts, it isn't always obvious that the missing replicas are the reason why the nameno...
http://issues.apache.org/jira/browse/HDFS-7537    Author: Allen Wittenauer, 2014-12-16, 22:15
[HDFS-7534] how to enable namenode GC logging - HDFS - [issue]
...Hey Team,Could you please let me know how to enable GC logging for hadoop namenode. ?I tried below method :modified HADOOP_NAMENODE_OPTS in /etc/hadoop/conf/hadoop-env.sh as below and restar...
http://issues.apache.org/jira/browse/HDFS-7534    Author: Kuldeep Kulkarni, 2014-12-16, 21:01
[HDFS-7535] Utilize Snapshot diff report for distcp - HDFS - [issue]
...Currently HDFS snapshot diff report can identify file/directory creation, deletion, rename and modification under a snapshottable directory. We can use the diff report for distcp between the...
http://issues.apache.org/jira/browse/HDFS-7535    Author: Jing Zhao, 2014-12-16, 20:47
[HDFS-2825] Add test hook to turn off the writer preferring its local DN - HDFS - [issue]
...Currently, the default block placement policy always places the first replica in the pipeline on the local node if there is a valid DN running there. In some network designs, within-rack ban...
http://issues.apache.org/jira/browse/HDFS-2825    Author: Todd Lipcon, 2014-12-16, 19:19
[HDFS-7533] Datanode sometimes does not shutdown on receiving upgrade shutdown command - HDFS - [issue]
...When datanode is told to shutdown via the dfsadmin command during rolling upgrade, it may not shutdown.  This is because not all writers have responder running, but sendOOB() tries anyw...
http://issues.apache.org/jira/browse/HDFS-7533    Author: Kihwal Lee, 2014-12-16, 18:42
[HDFS-7005] DFS input streams do not timeout - HDFS - [issue]
...Input streams lost their timeout.  The problem appears to be DFSClient#newConnectedPeer does not set the read timeout.  During a temporary network interruption the server will clos...
http://issues.apache.org/jira/browse/HDFS-7005    Author: Daryn Sharp, 2014-12-16, 16:40
[HDFS-7471] TestDatanodeManager#testNumVersionsReportedCorrect occasionally fails - HDFS - [issue]
...From https://builds.apache.org/job/Hadoop-Hdfs-trunk/1957/ :FAILED:  org.apache.hadoop.hdfs.server.blockmanagement.TestDatanodeManager.testNumVersionsReportedCorrectError Message:The ma...
http://issues.apache.org/jira/browse/HDFS-7471    Author: Ted Yu, 2014-12-16, 16:24
[HDFS-6919] Enforce a single limit for RAM disk usage and replicas cached via locking - HDFS - [issue]
...The DataNode can have a single limit for memory usage which applies to both replicas cached via CCM and replicas on RAM disk.See comments 1, 2 and 3 for discussion....
http://issues.apache.org/jira/browse/HDFS-6919    Author: Arpit Agarwal, 2014-12-16, 15:45
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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