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[HDFS-6752] Avoid Address bind errors in TestDatanodeConfig#testMemlockLimit - HDFS - [issue]
...Above test failed due to Address Bind Exception.Set the HTTP port to ephemeral port in Configuration.java.net.BindException: Port in use: 0.0.0.0:50075 at sun.nio.ch.Net.bind(Native Method) ...
http://issues.apache.org/jira/browse/HDFS-6752    Author: Vinayakumar B, 2014-07-25, 11:44
[HDFS-4265] BKJM doesn't take advantage of speculative reads - HDFS - [issue]
...BookKeeperEditLogInputStream reads entry at a time, so it doesn't take advantage of the speculative read mechanism introduced by BOOKKEEPER-336....
http://issues.apache.org/jira/browse/HDFS-4265    Author: Ivan Kelly, 2014-07-25, 11:03
[HDFS-6709] Implement off-heap data structures for NameNode and other HDFS memory optimization - HDFS - [issue]
...We should investigate implementing off-heap data structures for NameNode and other HDFS memory optimization.  These data structures could reduce latency by avoiding the long GC times th...
http://issues.apache.org/jira/browse/HDFS-6709    Author: Colin Patrick McCabe, 2014-07-25, 09:13
[HDFS-5919] FileJournalManager doesn't purge empty and corrupt inprogress edits files - HDFS - [issue]
...FileJournalManager doesn't purge empty and corrupt inprogress edit files.These stale files will be accumulated over time.These should be cleared along with the purging of other edit logs...
http://issues.apache.org/jira/browse/HDFS-5919    Author: Vinayakumar B, 2014-07-25, 09:10
[HDFS-6747] Display the most recent GC info on NN webUI - HDFS - [issue]
...It will be handy if the recent GC information is available on NN webUI. admins don't need to dig out GC logs....
http://issues.apache.org/jira/browse/HDFS-6747    Author: Ming Ma, 2014-07-25, 08:45
[HDFS-6722] Display readable last contact time for dead nodes on NN webUI - HDFS - [issue]
...For dead node info on NN webUI, admins want to know when the nodes became dead, to troubleshoot missing block, etc. Currently the webUI displays the last contact as "the unit of seconds sinc...
http://issues.apache.org/jira/browse/HDFS-6722    Author: Ming Ma, 2014-07-25, 07:36
[HDFS-6746] Support datanode list pagination and filtering for big clusters on NN webUI - HDFS - [issue]
...This isn't a major issue yet. Still it might be good to add support for pagination at some point and maybe some filtering. For example, that is useful to filter out live nodes that belong to...
http://issues.apache.org/jira/browse/HDFS-6746    Author: Ming Ma, 2014-07-25, 07:35
[HDFS-6745] Display the list of "very-under-replicated blocks" as well as the files on NN webUI - HDFS - [issue]
...Sometimes admins want to know the list of "very-under-replicated blocks" before major actions such as decommission; as these blocks are more likely to turn into missing blocks. "very-under-r...
http://issues.apache.org/jira/browse/HDFS-6745    Author: Ming Ma, 2014-07-25, 07:34
[HDFS-6744] Improve decommissioning nodes and dead nodes access on the new NN webUI - HDFS - [issue]
...The new NN webUI lists live node at the top of the page, followed by dead node and decommissioning node. From admins point of view:1. Decommissioning nodes and dead nodes are more interestin...
http://issues.apache.org/jira/browse/HDFS-6744    Author: Ming Ma, 2014-07-25, 07:28
[HDFS-6743] Put IP address into a new column on the new NN webUI - HDFS - [issue]
...The new NN webUI combines hostname and IP into one column in datanode list. It is more convenient for admins if the IP address can be put to a separate column, as in the legacy NN webUI....
http://issues.apache.org/jira/browse/HDFS-6743    Author: Ming Ma, 2014-07-25, 07:27
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